1–50 of 61 hits
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    Chemical-release mission of CRRES

    Reasoner, David L. | NTRS | 1992
    from the chemical-release experiments performed to date are (1) demonstration of critical velocity ionization over a narrow range of parameter ...

    Assessment of chemical nonequilibrium for massively ablating graphite.

    Lincoln, K. A. / Howe, J. T. / Liu, T.-M. | NTRS | 1973
    Several types of artificial graphite have been irradiated by laser pulses in vacuum, and the composition of the resulting vapor cloud has ...

    Unmanned planetary spacecraft chemical rocket propulsion.

    Burlage, H., Jr. / Gin, W. / Riebling, R. W. | NTRS | 1972
    Review of some chemical propulsion technology advances suitable for future unmanned spacecraft applications. Discussed system varieties ...

    Chemical recombination in an expansion tube

    Bakos, Robert J. / Morgan, Richard G. | NTRS | 1994
    The note describes the theoretical basis of chemical recombination in an expansion tube which simulates energy, Reynolds number, and stream ...

    Chemical launch system options for microspacecraft

    Sargent, Mark G. | NTRS | 1989
    attention is given to the capabilities of Piggyback, small launch vehicles, and large launch vehicles. It is noted that Piggyback options on the ...

    Chemical analysis experiment for the Surveyor lunar mission.

    Franzgrote, E. / Knolle, K. / Patterson, J. H. et al. | NTRS | 1967
    Lunar surface chemical composition analysis by Surveyor-borne instrument based on alpha interaction with matter ...
    Keywords: CHEMICAL ANALYSIS

    Direct numerical simulations of a reacting mixing layer with chemical heat release

    Mcmurtry, P. A. / Jou, W.-H. / Riley, J. J. et al. | NTRS | 1986

    F-19 chemical shift tensor in group II difluorides.

    Vaughan, R. W. / Elleman, D. D. / Rhim, W.-K. et al. | NTRS | 1972

    Chemical propulsion - The old and the new challenges

    Mccarty, J. P. / Lombardo, J. A. | NTRS | 1973
    The historical background concerning the application of liquid propellant rockets is considered. Progress to date in chemical liquid ...

    Lunar missions using advanced chemical propulsion: System design issues

    Palaszewski, Bryan | NTRS | 1994
    To provide the transportation of lunar base elements to the moon, large high-energy propulsion systems will be required. Advanced ...

    An alpha particle experiment for chemical analysis of the Martian surface and atmosphere.

    Economou, T. E. / Turkevich, A. L. / Patterson, J. H. | NTRS | 1973
    provide a chemical analysis of the Martian surface and atmosphere. Analyses of rocks of known and unknown compositions have been made under ...

    A new synthesis of o-nitrophenylacetaldehyde.

    Noland, W. E. / Sellstedt, J. H. | NTRS | 1966
    New synthesis of o-nigrophenylacetaldehyde ...
    Keywords: CHEMICAL REACTION

    Millimeter and submillimeter spectrum of NO+

    Bowman, W. C. / Herbst, E. / De Lucia, F. C. | NTRS | 1982

    Direct Observation of Nucleus Structure and Nucleation Pathways

    Vekilov, Peter G. / Yau, S.-T. | NTRS | 2001

    Microwave spectra of 1,3-difluoroallene and fluoroallene

    Ellis, P. D. / Li, Y. S. / Tong, C. C. et al. | NTRS | 1975

    Low temperature specific heat of neodymium magnesium nitrate.

    Rauckhorst, W. H. / Fenichel, H. | NTRS | 1973

    3 nu/sub 3/ band of C-13H4

    Pugh, L. A. / Owen, T. / Rao, K. N. | NTRS | 1974

    Distribution of reaction products /theory/. VIII - Cl + HI, Cl + DI.

    Parr, C. A. / Polanyi, J. C. / Wong, W. H. | NTRS | 1973

    Prohibited autodetachment in OD- formed by collisions of O- with D2.

    Doverspike, L. D. / Champion, R. L. / Lam, S. K. | NTRS | 1973

    Ablation of ATJ Graphite at High Temperatures

    John H Lundell / Robert R Dickey | NTRS | 1973
    Results of an extensive experimental program on the ablation of ATJ graphite in air at surface pressures of 0.3 to 4.4 atm and surface ...
    Publisher: American Institute of Aeronautics and Astronautics

    Measurements of the O/+/ + N2 and O/+/ + O2 reaction rates from 300 to 900 K

    Chen, A. / Johnsen, R. / Biondi, M. A. | NTRS | 1978

    Prediction of self-pressurization rate of cryogenic propellant tankage

    Hochstein, John I. / Ji, Hyun-Chul / Aydelott, John C. | NTRS | 1990
    chemical-propulsion orbit transfer vehicle. The computational predictions show that even small amounts of subcooling will significantly decrease ...

    The resources of Mars for human settlement

    Meyer, Thomas R. / Mckay, Christopher P. | NTRS | 1989
    Spacecraft exploration of Marshas shown that the essential resources necessary for life support are present on the Martian surface. The key ...

    Surface composition of solid-rocket exhausted aluminum oxide particles

    Cofer, Wesley R., III / Winstead, Edward L. / Key, Lawrence E. | NTRS | 1989
    potential physical/chemical modification of the SRPA particle surfaces and their corresponding interaction with the atmosphere. ...

    Computation of unsteady shock-induced combustion using logarithmic species conservation equations

    Wilson, Gregory J. / Sussman, Myles A. | NTRS | 1993
    usefulness of the ballistic-range experiments for the validation of numerical techniques and chemical kinetic models is also demonstrated. ...

    Effect of surface catalytic activity on stagnation heat-transfer rates.

    Anderson, L. A. | NTRS | 1973
    -density stagnation-point boundary layers. Data were obtained in arc-heated facilities that were capable of producing large percentages of chemical ...

    Effect of Departure Delays on Manned Mars Mission Selection

    Desai, Prasun N. / Tartabini, Paul V. | NTRS | 1995
    alleviate the IMLEO penalties. Three different classes of missions are analyzed, using chemical and nuclear thermal propulsion systems in the 2000 ...
    Publisher: American Inst. of Aeronautics and Astronautics

    Evaluation of the Munich Method for modeling rocket engine performance

    Zeleznik, Frank J. | NTRS | 1993
    chemical equilibrium program. An examination of the Munich Method shows that it contains several flaws. If these defects are corrected then the ...

    Feasibility Study of MEMS-Based Accelerator Grid Systems for Micro-Ion Engines: Electric Breakdown Characteristics

    Mueller, J. / Pyle, D. / Chakraborty, I. et al. | NTRS | 1999
    Low-temperature (LTO) chemical vapor deposited (CVD) silicon dioxide was investigated for use as an insulator material in microfabricated ...

    Dry-surface coating method for visualization of separation on a bluff body

    Sadeh, W. Z. / Brauer, H. J. / Durgin, J. R. | NTRS | 1981
    body wake of a gas able to produce a base through chemical reaction with the solvent of the conditioning solution; and (5) color reaction ...

    Gaseous environment of the Shuttle early in the Spacelab 2 mission

    Pickett, Jolene S. / Murphy, Gerald B. / Kurth, William S. | NTRS | 1988
    seen during another experiment's gas purge. Orbiter chemical-release effects include: pressure increases of 200 percent up to 7 x 10 to the ...

    Expert systems for automated maintenance of a Mars oxygen production system

    Huang, Jen-Kuang / Ho, Ming-Tsang / Ash, Robert L. | NTRS | 1992
    toward developing the methodology required to enable autonomous operation and control of these simple chemical processors at Mars. Failure ...

    Recent trends in stratospheric ozone - Implications of ozone and temperature correlation

    Chandra, S. | NTRS | 1990
    the linear trend in ozone from 1979 to 1986. The ozone and temperature variabilities are coupled through chemical and dynamical processes. In ...

    A degree of controllability definition - Fundamental concepts and application to modal systems

    Viswanathan, C. N. / Longman, R. W. / Likins, P. W. | NTRS | 1984
    , such as the control of future, very large, flexible spacecraft and certain chemical process control problems, the question of how to choose the ...

    Transient photoconductivity in azulene single crystals

    Sonnonstine, T. J. / Wiglesworth, A. / Hermann, A. M. | NTRS | 1973

    Formula for thermal accommodation coefficients.

    Goodman, F. O. / Wachman, H. Y. | NTRS | 1967
    Formula for thermal accommodation coefficient as basis for accommodation coefficient of monatomic gas-solid system calculation ...

    Advanced Propulsion for Geostationary Orbit Insertion and North-South Station Keeping

    Oleson, Steven R. / Myers, Roger M. / Kluever, Craig A. et al. | NTRS | 1997
    chemical propulsion apogee engine fuel is reduced in this analysis to allow the use of electric propulsion. A numerical optimizer is used to ...
    Publisher: American Institute of Aeronautics and Astronautics

    A simplified hydrocarbon reaction mechanism for combustion applications

    Jachimowski, C. J. | NTRS | 1985
    A simplified chemical kinetic reaction mechanism for the combustion of a hydrocarbon fuel is presented and discussed. The observed kinetic ...

    Space Shuttle externally induced environment compared with Skylab's natural environment

    Susko, Michael | NTRS | 1990
    Electret measurements obtained of the particulate contamination environment within the Space Shuttle Orbiter's cargo bay are presently ...

    Commercial prospects for extraterrestrial materials

    Criswell, D. R. / Waldron, R. D. | NTRS | 1978
    base for chemical processing. Cost factors would be comparable to those of the terrestrial deployment of the first SPS, and such a project ...

    Acetylene fuel from atmospheric CO2 on Mars

    Landis, Geoffrey A. / Linne, Diane L. | NTRS | 1992
    methane and oxygen by the exothermic reaction in an atmospheric processing module. Use of simple chemical reactions to produce acetylene/oxygen ...

    Magnesium fluoride as energy storage medium for spacecraft solar thermal power systems

    Lurio, Charles A. | NTRS | 1992
    high heat of fusion per unit mass at a high melting point (1536 K). Theoretical evaluation showed the basic chemical compatibility of liquid ...

    Magnesium and Carbon Dioxide - A Rocket Propellant for Mars Missions

    Shafirovich, E. IA. / Shiriaev, A. A. / Goldshleger, U. I. | NTRS | 1993
    fuels ensure the most impulse but poor inflammability of Be and high toxicity of its compounds put obstacles to their applications. Analysis of ...