Results 71 to 80 of about 3,658 (232)

Advanced propulsion for LEO and GEO platforms [PDF]

Mission requirements and mass savings applicable to specific low earth orbit and geostationary earth orbit platforms using three highly developed propulsion systems are described.
Pidgeon, David J., Sovey, James S.
core   +1 more source

Global Stability of a Premixed Reaction Zone (Time-Dependent Liñan’s Problem) [PDF]

, 1990
Global stability properties of a premixed, three-dimensional reaction zone are considered. In the nonadiabatic case (i.e., when there is a heat exchange between the reaction zone and the burned gases) there is a unique, spatially one-dimensional steady ...
Adams Robert A., Carlos Alvarez Pereira, Coddington Earl A., Eidel'man S. D., Friedman Avner, Henry Daniel, Hirsch Morris W., José M. Vega, Ladyzenskaja O. A., Protter Murray H., Williams F. A.   +10 more
core   +2 more sources

Reusable Reentry Satellite (RRS): Propulsion system trade study [PDF]

The purpose of the Reusable Reentry Satellite (RRS) Propulsion System Trade Study described in this summary report was to investigate various propulsion options available for incorporation on the RRS and to select the option best suited for RRS ...

core   +1 more source

Advancing green propulsion: Experimental analysis of dual-mode operation in a hydrogen peroxide monopropellant thruster

Propulsion and Power Research
Hydrogen peroxide (HTP) is receiving renewed attention as a green monopropellant for small-satellite propulsion. This study presents the design and experimental evaluation of a hydrogen peroxide monopropellant thruster capable of operating in both steady-
Djamal Darfilal, Fatima Alhammadi, Abderrahim Nabi, Jeongmoo Huh, Khatir Mohamed, Elena Fantino, Abdul Hai, Sean Shan Min Swei   +7 more
doaj   +1 more source

Orbital Fluid Resupply Assessment [PDF]

Orbital fluid resupply can significantly increase the cost-effectiveness and operational flexibility of spacecraft, satellites, and orbiting platforms and observatories. Reusable tankers are currently being designed for transporting fluids to space.
Eberhardt, Ralph N.
core   +1 more source

A study on various methods of supplying propellant to an orbit insertion rocket engine [PDF]

Various types of pumps and pump drives were evaluated to determine the lightest weight system for supplying propellants to a planetary orbit insertion rocket engine. From these analyses four candidate propellant feed systems were identified. Systems Nos.
Boretz, J. E., Huniu, S., Lewis, J., Pagani, M., Paul, D., Paulsen, B., Thompson, M.   +6 more
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Innovative 3D numerical study of a catalyst bed and comparison with previous 2D and experimental studies

International Journal of Thermofluids
This paper analyzes the catalytic bed of a 10 (N) Liquid Monopropellant Thruster (LMT) in an innovative 3D numerical study. LMT includes an injector, a decomposition chamber with a catalytic bed, and a nozzle.
M.H. Mansuri Mughari, H. Naseh, S. Noori
doaj   +1 more source

Monopropellant thruster exhaust plume contamination measurements [PDF]

The potential spacecraft contaminants in the exhaust plume of a 0.89N monopropellant hydrazine thruster were measured in an ultrahigh quartz crystal microbalances located at angles of approximately 0 deg, + 15 deg and + or - 30 deg with respect to the ...
Baerwald, R. K., Passamaneck, R. S.
core   +1 more source

Design issues for lunar in situ aluminum/oxygen propellant rocket engines [PDF]

Design issues for lunar ascent and lunar descent rocket engines fueled by aluminum/oxygen propellant produced in situ at the lunar surface were evaluated.
Meyer, Michael L.
core   +1 more source

Experimental Investigation of PWM Throttling in a 50-Newton-Class HTP Monopropellant Thruster: Analysis of Pressure Surges and Oscillations

Aerospace
High-test peroxide (HTP) monopropellant thrusters are being considered for spacecraft lander missions due to their simplicity and reduced toxicity compared to traditional propellants. Pulse-Width Modulation (PWM) throttling is a key technique for precise
Suk Min Choi, Christian Bach
doaj   +1 more source