Results 81 to 90 of about 11,718 (221)

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

Active space debris removal by a hybrid propulsion module [PDF]

, 2013
During the last 40 years, the mass of the artificial objects in orbit increased quite steadily at the rate of about 145 metric tons annually, leading to a total tally of approximately 7000 metric tons.
Anselmo, L., Belokonov, I.V., Bernelli, F., Bonnal, C., Branz, F., Chiesa, Sergio, De Luca, L.T., Francesconi, A., Grassi, M., Maggi, F., Pardini, C., Pavarin, D., Tadini, P., Trushlyakov, V., Viola, Nicole   +14 more
core   +1 more source

A theoretical study on throttle ranges of O/F controllable hybrid rocket propulsion systems

Journal of Fluid Science and Technology, 2018
The characteristics of several O/F control methods for hybrid rocket propulsion have been discussed and theoretically analyzed from the physical properties of propellants and fuel regression behavior.
Kohei OZAWA, Toru SHIMADA
doaj   +1 more source

Next generation earth-to-orbit space transportation systems: Unmanned vehicles and liquid/hybrid boosters [PDF]

The United States civil space effort when viewed from a launch vehicle perspective tends to categorize into pre-Shuttle and Shuttle eras. The pre-Shuttle era consisted of expendable launch vehicles where a broad set of capabilities were matured in a ...
Hueter, Uwe
core   +1 more source

Preliminary analysis of space mission applications for electromagnetic launchers [PDF]

The technical and economic feasibility of using electromagnetically launched EML payloads propelled from the Earth's surface to LEO, GEO, lunar orbit, or to interplanetary space was assessed.
Conlon, R. J., Earhart, R. W., Miller, L. A., Rice, E. E.   +3 more
core   +1 more source

Analysis of advanced cooling strategies for rocket engines conveying ternary hybrid nanofluids with second slip conditions and melting heat transfer

Case Studies in Thermal Engineering
Effective cooling in rocket engines is essential to prevent overheating and ensure efficient performance under extreme operating conditions. This study presents a comprehensive investigation into advanced cooling strategies for rocket engines utilizing ...
Hatem Gasmi, A.M. Obalalu, Umair Khan, Anuar Ishak, Hami Gündoğdu, Nermeen Abdullah, Samia Elattar, Ahmed M. Galal   +7 more
doaj   +1 more source

Approaches to Low Fuel Regression Rate in Hybrid Rocket Engines

International Journal of Aerospace Engineering, 2012
Hybrid rocket engines are promising propulsion systems which present appealing features such as safety, low cost, and environmental friendliness. On the other hand, certain issues hamper the development hoped for.
Dario Pastrone
doaj   +1 more source

Innovative Methods to Enhance the Combustion Properties of Solid Fuels for Hybrid Rocket Propulsion

Aerospace, 2019
The low regression rates for hydroxyl-terminated polybutadiene (HTPB)-based solid fuels and poor mechanical properties for the alternative paraffin-based liquefying fuels make today hybrid rocket engines far from the outstanding accomplishments of solid ...
Suhang Chen, Yue Tang, Wei Zhang, Ruiqi Shen, Hongsheng Yu, Yinghua Ye, Luigi T. DeLuca   +6 more
doaj   +1 more source

Non-chemical space propulsion [PDF]

Space mission requirements and technical feasibility of non-chemical space propulsion ...
Evvard, J. C.
core   +1 more source

Testing and Modeling Fuel Regression Rate in a Miniature Hybrid Burner

International Journal of Aerospace Engineering, 2012
Ballistic characterization of an extended group of innovative HTPB-based solid fuel formulations for hybrid rocket propulsion was performed in a lab-scale burner. An optical time-resolved technique was used to assess the quasisteady regression history of
Luciano Fanton, Christian Paravan, Luigi T. De Luca   +2 more
doaj   +1 more source