Results 231 to 240 of about 38,437 (282)

The regolith rocket—A hybrid rocket using lunar resources

Acta Astronautica, 2021
Abstract The use of lunar hybrid rockets, that connect the Moon surface with a lunar gateway and provide it with resources, are evaluated. Therefore, the composition of lunar regolith and its use for specific rocket subsystems is assessed. In particular, this work evaluates the use of oxygen and aluminum from regolith as oxidant/fuel mixture as well ...
Stoll, Enrico, Härke, Philip, Linke, Stefan, Heeg, Francesca, May, Stefan   +4 more
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Transient behavior in hybrid rockets [PDF]

33rd Joint Propulsion Conference and Exhibit, 1997
The combustion dynamics in hybrid rockets is studied to provide a basic input into transient motor processes, such as ignition, throttling, thrust termination and instability. The model treats the time dependent heat flow into the fuel, with ablation at the surface. The gasification uses a single effective heat to account for surface processes, such as
M. Karabeyoglu, D. Altman, M. Karabeyoglu, D. Altman   +3 more
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Hybrid rocket instability

29th Joint Propulsion Conference and Exhibit, 1993
The paper provides a brief review of theoretical and experimental studies concerned with hybrid rocket instability. The instabilities discussed include atomization and mixing instabilities, chuffing instabilities, pressure coupled combustion instabilities, and vortex shedding.
B. Greiner, Robert A. Frederick
openaire   +2 more sources

Analysis of hybrid rocket combustion

Acta Astronautica, 1980
Abstract The problem involving flow of a turbulent boundary layer with mass injection and combustion is studied to investigate the hydrid rocket combustion. Because of the presence of combustion, the momentum equation is coupled to the energy and species equations.
C.C. Tao, D.L. Cherng
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Simulation Code for Hybrid Rocket Combustion [PDF]

46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2010
The simulation of the flame structure typical of hybrid rockets is addressed in this paper. The process is a complex interaction among oxidizer atomization and vaporization, gas phase combustion, fuel surface pyrolysis, soot formation and radiation phenomena.
GARIANI, GABRIELA, MAGGI, FILIPPO, GALFETTI, LUCIANO   +2 more
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Hybrid rocket combustion study

29th Joint Propulsion Conference and Exhibit, 1993
The objectives of this study of 'pure' or 'classic' hybrids are to (1) extend our understanding of the boundary layer combustion process and the critical engineering parameters that define this process, (2) develop an up-to-date hybrid fuel combustion model, and (3) apply the model to correlate the regression rate and scaling properties of potential ...
L. D. Strand, N. S. Cohen, R. L. Ray
openaire   +2 more sources

Acoustic Analysis of Hybrid Rocket Combustion Chambers [PDF]

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2007
A method based on passive linear stability measurement has been developed to investigate combustion dynamics in hybrid rocket motors. A one-dimensional model is used to describe the acoustic motions inside the rocket chamber as a function of the motor axial coordinate. The equations of mass, momentum, and energy are solved for the average flow.
PASTRONE, Dario Giuseppe, CASALINO, LORENZO, ROSA SENTINELLA M, CARMICINO C.   +3 more
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Development of a Student Hybrid Rocket

48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2012
Nammo Raufoss AS with the support from Andoya Rocket Range has developed a novel small diameter hybrid rocket, the SHR110, for carrying student experiments and small payloads to 10km altitude approximately. The rocket engine is based on a nitrous oxide hybrid rocket motor providing an environmentally clean alternative to the surplus military rockets ...
Jan Erik Ronningen, Morten Berger, Roy Vesterås   +2 more
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Micro and Full-Scale Experiments on Hybrid Rocket Fuel and Prelude to Hybrid Rocket Combustor Simulations

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2013
The high density polyethylene, as hybrid rocket fuel, has been chosen to be studied. Thermogravimetric analysis allowed to determine an Arrhenius type equation for its regression rate. A flash pyrolysis coupled to GC/MS/FID has been used to observe influence of oxidative environment on pyrolysis byproducts quantity.
Mangeot, Alexandre, Gascoin, Nicolas, Gillard, Philippe   +2 more
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