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High Pressure Droplet Burning Experiments in Reduced Gravity

High Pressure Droplet Burning Experiments in Reduced Gravity
  • Author : C. Chauveau
  • Publisher :Unknown
  • Release Date :1996
  • Total pages :229
  • ISBN : OCLC:1109606224
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Summary :

Experiments in Reduced Gravity

Experiments in Reduced Gravity
  • Author : Nikolaus Kuhn
  • Publisher :Unknown
  • Release Date :2014-09-06
  • Total pages :50
  • ISBN : 9780128004623
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Summary : Experiments in Reduced Gravity: Sediment Settling on Mars is the first book to be published that reflects experiments conducted on Martian geomorphology in reduced gravity. This brief yet important book on sediment experiments assesses the theoretical and empirical foundation of the models used to analyze the increasing information we have on the past geography on Mars. The book also evaluates the need to develop new methods for analyzing new information by providing a conceptual outline and a case study on how experiments can be used to test current theoretical considerations. The conceptual approach to identifying the need for and role of experiments will be of interest to planetary scientists and geoscientists not necessarily involved with Mars, but those using experiments in their research who can apply the book’s concepts. Includes figures, diagrams, illustrations, and photographs to vividly explore experiments and outcomes in reduced gravity Provides an outline of planned experiments and questions related to Martian geomorphology Features results from the MarsSedEx 1 Experiment in 2012

Feasibility of Reduced Gravity Experiments Involving Quiescent, Uniform Particle Cloud Combustion

Feasibility of Reduced Gravity Experiments Involving Quiescent, Uniform Particle Cloud Combustion
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1989
  • Total pages :40
  • ISBN : NASA:31769000584212
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Summary :

Saltation Threshold Experiments Conducted Under Reduced Gravity Conditions

Saltation Threshold Experiments Conducted Under Reduced Gravity Conditions
  • Author : B.R. White
  • Publisher :Unknown
  • Release Date :1987
  • Total pages :9
  • ISBN : OCLC:1109508879
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Summary :

Computational Fluid Dynamics Models of Electromagnetic Levitation Experiments in Reduced Gravity

Computational Fluid Dynamics Models of Electromagnetic Levitation Experiments in Reduced Gravity
  • Author : Gwendolyn Bracker
  • Publisher :Unknown
  • Release Date :2019
  • Total pages :229
  • ISBN : OCLC:1151628573
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Summary :

The Microgravity Research Experiments (Micrex) Data Base. Volume 1

The Microgravity Research Experiments (Micrex) Data Base. Volume 1
  • Author : National Aeronautics and Space Administration (NASA)
  • Publisher :Unknown
  • Release Date :2018-08-04
  • Total pages :374
  • ISBN : 1724687883
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Summary : An electronic data base identifying over 800 fluids and materials processing experiments performed in a low-gravity environment has been created at NASA Marshall Space Flight Center. The compilation, called MICREX (MICrogravity Research Experiments), was designed to document all such experimental efforts performed (1) on U.S. manned space vehicles, (2) on payloads deployed from U.S. manned space vehicles, and (3) on all domestic and international sounding rockets (excluding those of China and the former U.S.S.R.). Data available on most experiments include (1) principal and co-investigators, (2) low-gravity mission, (3) processing facility, (4) experimental objectives and results, (5) identifying key words, (6) sample materials, (7) applications of the processed materials/research area, (8) experiment descriptive publications, and (9) contacts for more information concerning the experiment. This technical memorandum (1) summarizes the historical interest in reduced-gravity fluid dynamics, (2) describes the experimental facilities employed to examine reduced gravity fluid flow, (3) discusses the importance of a low-gravity fluids and materials processing data base, (4) describes the MICREX data base format and computational World Wide Web access procedures, and (5) documents (in hard-copy form) the descriptions of the first 600 fluids and materials processing experiments entered into MICREX. Winter, C. A. and Jones, J.C. Marshall Space Flight Center NASA-TM-108523-Vol-1, NAS 1.15:108523-Vol-1 ...

Definition of Experiments to Investigate Fire Suppressants in Microgravity

Definition of Experiments to Investigate Fire Suppressants in Microgravity
  • Author : National Aeronautics and Space Administration (NASA)
  • Publisher :Unknown
  • Release Date :2018-07-06
  • Total pages :64
  • ISBN : 1722334584
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Summary : Defined and justified here are the conceptual design and operation of a critical set of experiments expected to yield information on suppressants and on suppressant delivery systems under realistic spacecraft-fire conditions (smoldering). Specific experiment parameters are provided on the solid fuel (carbon), oxidants (habitable spacecraft atmospheres), fuel/oxidant supply, mixing mode, and rate (quiescent and finite; ventilated and replenishable), ignition mode, event, and reignition tendency, fire-zone size, fire conditions, lifetime, and consequences (toxicity), suppressants (CO2, H2O, N2) and suppressant delivery systems, and diagnostics. Candidate suppressants were identified after an analysis of how reduced gravity alters combustion, and how these alterations may influence the modes, mechanisms, and capacities of terrestrial agents to suppress unwanted combustion, or fire. Preferred spacecraft suppression concepts included the local, near-quiescent application of a gas, vapor, or mist that has thermophysical fire-suppression activity and is chemically inert under terrestrial (normal gravity) combustion conditions. The scale, number, and duration (about 1 hour) of the proposed low-gravity experiments were estimated using data not only on the limitations imposed by spacecraft-carrier (Shuttle or Space Station Freedom) accommodations, but also data on the details and experience of standardized smolder-suppression experiments at normal gravity. Deliberately incorporated into the conceptual design was sufficient interchangeability for the prototype experimental package to fly either on Shuttle now or Freedom later. This flexibility is provided by the design concept of up to 25 modular fuel canisters within a containment vessel, which permits both integration into existing low-gravity in-space combustion experiments and simultaneous testing of separate experiments to conserve utilities and time. Reuther, James J. Unspecified Center...

The Motion of Bubbles and Drops in Reduced Gravity

The Motion of Bubbles and Drops in Reduced Gravity
  • Author : R. Shankar Subramanian,R. Balasubramaniam
  • Publisher :Unknown
  • Release Date :2001-04-09
  • Total pages :471
  • ISBN : 0521496055
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Summary : This 2001 book provides a thorough review of the motion of bubbles and drops in reduced gravity.

Two-phase Alkali-metal Experiments in Reduced Gravity

Two-phase Alkali-metal Experiments in Reduced Gravity
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1986
  • Total pages :229
  • ISBN : OCLC:727213394
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Summary : Future space missions envision the use of large nuclear reactors utilizing either a single or a two-phase alkali-metal working fluid. The design and analysis of such reactors require state-of-the-art computer codes that can properly treat alkali-metal flow and heat transfer in a reduced-gravity environment. A literature search of relevant experiments in reduced gravity is reported on here, and reveals a paucity of data for such correlations. The few ongoing experiments in reduced gravity are noted. General plans are put forth for the reduced-gravity experiments which will have to be performed, at NASA facilities, with benign fluids. A similar situation exists regarding two-phase alkali-metal flow and heat transfer, even in normal gravity. Existing data are conflicting and indequate for the task of modeling a space reactor using a two-phase alkali-metal coolant. The major features of past experiments are described here. Data from the reduced-gravity experiments with innocuous fluids are to be combined with normal gravity data from the two-phase alkali-metal experiments. Analyses undertaken here give every expectation that the correlations developed from this data base will provide a valid representation of alkali-metal heat transfer and pressure drop in reduced gravity.

Two-phase Reduced Gravity Experiments for a Space Reactor Design

Two-phase Reduced Gravity Experiments for a Space Reactor Design
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1986
  • Total pages :229
  • ISBN : OCLC:1065834978
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Summary : Future space missions envision the use of large nuclear reactors utilizing either a single or a two-phase alkali-metal working fluid. The design and analysis of such reactors require state-of-the-art computer codes that can properly treat alkali-metal flow and heat transfer in a reduced-gravity environment. New flow regime maps, models, and correlations are required if the codes are to be successfully applied to reduced-gravity flow and heat transfer. General plans are put forth for the reduced-gravity experiments which will have to be performed, at NASA facilities, with benign fluids. Data from the reduced-gravity experiments with innocuous fluids are to be combined with normal gravity data from two-phase alkali-metal experiments. Because these reduced-gravity experiments will be very basic, and will employ small test loops of simple geometry, a large measure of commonality exists between them and experiments planned by other organizations. It is recommended that a committee be formed, to coordinate all ongoing and planned reduced gravity flow experiments.

The Microgravity Research Experiments (Micrex) Data Base, Volume 4

The Microgravity Research Experiments (Micrex) Data Base, Volume 4
  • Author : National Aeronautics and Space Administration (NASA)
  • Publisher :Unknown
  • Release Date :2018-08-04
  • Total pages :512
  • ISBN : 1724687816
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Summary : An electronic data base identifying over 800 fluids and materials processing experiments performed in a low-gravity environment has been created at NASA Marshall Space Flight Center. The compilation, called MICREX (MICrogravity Research Experiments), was designed to document all such experimental efforts performed (1) on U.S. manned space vehicles, (2) on payloads deployed from U.S. manned space vehicles, and (3) on all domestic and international sounding rockets (excluding those of China and the former U.S.S.R.). Data available on most experiments include (1) principal and co-investigators (2) low-gravity mission, (3) processing facility, (4) experimental objectives and results, (5) identifying key words, (6) sample materials, (7) applications of the processed materials/research area, (8) experiment descriptive publications, and (9) contacts for more information concerning the experiment. This technical Memorandum (1) summarizes the historical interest in reduced-gravity fluid dynamics, (2) describes the importance of a low-gravity fluids and materials processing data base, (4) describes the MICREX data base format and computational World Wide Web access procedures, and (5) documents (in hard-copy form) the descriptions of the first 600 fluids and materials processing experiments entered into MICREX. Winter, C. A. and Jones, J. C. Marshall Space Flight Center NASA-TM-108523-Vol-4, NAS 1.15:108523-Vol-4 ...

Recapturing a Future for Space Exploration

Recapturing a Future for Space Exploration
  • Author : National Research Council,Division on Engineering and Physical Sciences,Aeronautics and Space Engineering Board,Space Studies Board,Committee for the Decadal Survey on Biological and Physical Sciences in Space
  • Publisher :Unknown
  • Release Date :2012-01-30
  • Total pages :464
  • ISBN : 9780309163842
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Summary : More than four decades have passed since a human first set foot on the Moon. Great strides have been made in our understanding of what is required to support an enduring human presence in space, as evidenced by progressively more advanced orbiting human outposts, culminating in the current International Space Station (ISS). However, of the more than 500 humans who have so far ventured into space, most have gone only as far as near-Earth orbit, and none have traveled beyond the orbit of the Moon. Achieving humans' further progress into the solar system had proved far more difficult than imagined in the heady days of the Apollo missions, but the potential rewards remain substantial. During its more than 50-year history, NASA's success in human space exploration has depended on the agency's ability to effectively address a wide range of biomedical, engineering, physical science, and related obstacles--an achievement made possible by NASA's strong and productive commitments to life and physical sciences research for human space exploration, and by its use of human space exploration infrastructures for scientific discovery. The Committee for the Decadal Survey of Biological and Physical Sciences acknowledges the many achievements of NASA, which are all the more remarkable given budgetary challenges and changing directions within the agency. In the past decade, however, a consequence of those challenges has been a life and physical sciences research program that was dramatically reduced in both scale and scope, with the result that the agency is poorly positioned to take full advantage of the scientific opportunities offered by the now fully equipped and staffed ISS laboratory, or to effectively pursue the scientific research needed to support the development of advanced human exploration capabilities. Although its review has left it deeply concerned about the current state of NASA's life and physical sciences research, the Committee for the Decadal Survey on Biological and Physical Sciences in Space is nevertheless convinced that a focused science and engineering program can achieve successes that will bring the space community, the U.S. public, and policymakers to an understanding that we are ready for the next significant phase of human space exploration. The goal of this report is to lay out steps and develop a forward-looking portfolio of research that will provide the basis for recapturing the excitement and value of human spaceflight--thereby enabling the U.S. space program to deliver on new exploration initiatives that serve the nation, excite the public, and place the United States again at the forefront of space exploration for the global good.

Earth, Partial, and Reduced Gravity Experiments and Numerical Work on Propane-oxygen Cool Flames at Sub-atmospheric Pressures

Earth, Partial, and Reduced Gravity Experiments and Numerical Work on Propane-oxygen Cool Flames at Sub-atmospheric Pressures
  • Author : Michael Robert Foster,Howard Pearlman
  • Publisher :Unknown
  • Release Date :2006
  • Total pages :226
  • ISBN : OCLC:133204101
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Summary :

Microgravity Combustion Science

Microgravity Combustion Science
  • Author : National Aeronautics and Space Adm Nasa
  • Publisher :Unknown
  • Release Date :2018-10-29
  • Total pages :50
  • ISBN : 1729340849
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Summary : An earlier overview is updated which introduced the promise of microgravity combustion research and provided a brief survey of results and then current research participants, the available set of reduced gravity facilities, and plans for experimental capabilities in the space station era. Since that time, several research studies have been completed in drop towers and aircraft, and the first space based combustion experiments since Skylab have been conducted on the Shuttle. The microgravity environment enables a new range of experiments to be performed since buoyancy induced flows are nearly eliminated, normally obscured forces and flows may be isolated, gravitational settling or sedimentation is nearly eliminated, and larger time or length scales in experiments are feasible. In addition to new examinations of classical problems, (e.g., droplet burning), current areas of interest include soot formation and weak turbulence, as influenced by gravity. Glenn Research Center RTOP 674-22-05...

International Space Station Increment-2 Quick Look Report

International Space Station Increment-2 Quick Look Report
  • Author : National Aeronautics and Space Adm Nasa
  • Publisher :Unknown
  • Release Date :2018-09-20
  • Total pages :70
  • ISBN : 1723853666
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Summary : The objective of this quick look report is to disseminate the International Space Station (ISS) Increment-2 reduced gravity environment preliminary analysis in a timely manner to the microgravity scientific community. This report is a quick look at the processed acceleration data collected by the Microgravity Acceleration Measurement System (MAMS) during the period of May 3 to June 8, 2001. The report is by no means an exhaustive examination of all the relevant activities, which occurred during the time span mentioned above for two reasons. First, the time span being considered in this report is rather short since the MAMS was not active throughout the time span being considered to allow a detailed characterization. Second, as the name of the report implied, it is a quick look at the acceleration data. Consequently, a more comprehensive report, the ISS Increment-2 report, will be published following the conclusion of the Increment-2 tour of duty. NASA sponsors the MAMS and the Space Acceleration Microgravity System (SAMS) to support microgravity science experiments, which require microgravity acceleration measurements. On April 19, 2001, both the MAMS and the SAMS units were launched on STS-100 from the Kennedy Space Center for installation on the ISS. The MAMS unit was flown to the station in support of science experiments requiring quasisteady acceleration data measurements, while the SAMS unit was flown to support experiments requiring vibratory acceleration data measurement. Both acceleration systems are also used in support of the vehicle microgravity requirements verification. The ISS reduced gravity environment analysis presented in this report uses mostly the MAMS acceleration data measurements (the Increment-2 report will cover both systems). The MAMS has two sensors. The MAMS Orbital Acceleration Research Experiment Sensor Subsystem, which is a low frequency range sensor (up to 1 Hz), is used to characterize the quasi-steady environment for payloads and ve

Drop Tower Days 1994 in Bremen

Drop Tower Days 1994 in Bremen
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1994
  • Total pages :271
  • ISBN : OCLC:1075528574
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Summary :

Zero Gravity Research Facility User's Guide

Zero Gravity Research Facility User's Guide
  • Author : National Aeronautics and Space Administration (NASA)
  • Publisher :Unknown
  • Release Date :2018-06-12
  • Total pages :36
  • ISBN : 1721041303
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Summary : The Zero Gravity Research Facility (ZGF) is operated by the Space Experiments Division of the NASA John H. Glenn Research Center (GRC) for investigators sponsored by the Microgravity Science and Applications Division of NASA Headquarters. This unique facility has been utilized by scientists and engineers for reduced gravity experimentation since 1966. The ZGF has provided fundamental scientific information, has been used as an important test facility in the space flight hardware design, development, and test process, and has also been a valuable source of data in the flight experiment definition process. The purpose of this document is to provide information and guidance to prospective researchers regarding the design, buildup, and testing of microgravity experiments.Thompson, Dennis M.Glenn Research CenterMICROGRAVITY; WEIGHTLESSNESS; DROP TOWERS; LOW GRAVITY MANUFACTURING; RESEARCH FACILITIES; TEST FACILITIES; HARDWARE; COMPUTER SYSTEMS DESIGN

Reduced Gravity Boiling and Condensing Experiments Simulated with the COBRA/TRAC Computer Code

Reduced Gravity Boiling and Condensing Experiments Simulated with the COBRA/TRAC Computer Code
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1988
  • Total pages :229
  • ISBN : OCLC:1065871687
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Summary : It is being recognized that there does not currently exist an adequate understanding of flow and heat transfer behavior in reduced- and zero-gravity. There is not a sufficient experimental fluid-thermal data base to develop design correlations for two-phase pressure losses, heat transfer coefficients, and critical heat flux limits in systems proposed for advanced power sources, propulsion, and other thermal management systems in space. Pacific Northwest Laboratory (PNL), is the lead laboratory for thermal hydraulics in the Department of Energy's Multimegawatt Space Power Program, and has the responsibility of developing microgravity thermal-hydraulic analysis capabilities for application to space nuclear power systems. In support of this program, PNL has performed a series of reduced-gravity two-phase flow experiments in the NASA KC-135 aircraft. The objective of the experiment was to supply basic thermal-hydraulic information that could be used in development of analytical design tools. 6 refs., 23 figs., 4 tabs.

Flow Induced Charging of Liquids in Reduced Gravity

Flow Induced Charging of Liquids in Reduced Gravity
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1996
  • Total pages :7
  • ISBN : OCLC:68377316
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Summary : Microgravity experiments on free fluid surfaces of large length scale could be subject to experimental artifact from flow induced charging. Under conditions favorable for flow induced charging, flowing liquids develop a static electrical charge which manifests itself as a force whose magnitude approaches that of surface tension force. Favorable conditions are: a non-conducting liquid, a small diameter non-conducting flow passage, a large flow volume, and a small separation distance between the fluid and another object. We present a method for calculating the magnitude of flow induced charging and scaling arguments so that potential problems can be determined and dealt with at the experimental design phase. A dimensionless ratio of charge force to surface tension force we call the Hula Number should be less than 0.5 to prevent artifact or unwanted fluid motion.

7th International Symposium on Experimental Methods for Microgravity Materials Science

7th International Symposium on Experimental Methods for Microgravity Materials Science
  • Author : Robert Aaron Schiffman
  • Publisher :Unknown
  • Release Date :1995-01-01
  • Total pages :171
  • ISBN : 0873393112
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Summary : This symposium proceedings focuses on the opportunities that a reduced gravity environment can offer in producing unique materials. Discussions of both in-space and on-Earth experiments are included.

Design of A Microgravity Spray Cooling Experiment

Design of A Microgravity Spray Cooling Experiment
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2006
  • Total pages :14
  • ISBN : OCLC:227902743
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Summary : An analytical and experimental study was conducted for the application of spray cooling in a micro gravity and high-g environment. Experiments were carried out aboard the NASA KC-135 reduced gravity aircraft, which provided both the microgravity and high-g environments. In reduced gravity, surface tension flow was observed around the spray nozzle, due to unconstrained liquid in the test chamber and flow reversal at the heat source. A transient analytical model was developed to predict the temperature and the spray heat transfer coefficient within the heated region. Comparison of the experimental transient temperature variation with analytical results showed good agreement for low heat input values. The transient analysis also verified that thermal equilibrium within the heated region could be reached during the 20-25s reduced gravity portion of the flight profile.