Results 191 to 200 of about 14,190 (245)
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Peregrine Hybrid Rocket Motor Ground Test Results
48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2012To further develop and demonstrate the applicability of liquefying-fuel hybrid rocket technology to low-cost launch applications, a small team of engineers is developing a medium-scale liquefying-fuel hybrid sounding rocket using storable propellants (paraffin wax and N2O) that will carry a 5 kg payload to the edge of space.
Greg Zilliac +5 more
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Instrumentation of UALR labscale hybrid rocket motor
SPIE Proceedings, 2006The Central Arkansas Combustion Group has used a NASA EPSCoR grant to improve the instrumentation and control of its labscale hybrid rocket facility. The research group investigates fundamental aspects of combustion in hybrid rocket motors. This paper describes the new instrumentation, provides examples of measurements taken, and describes novel ...
Andrew B. Wright +3 more
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Size scale-up in hybrid rocket motors
34th Aerospace Sciences Meeting and Exhibit, 1996Computational fluid dynamic analyses of the Navier-Stokes equations coupled with solid-phase pyrolysis, gas-phase combustion, turbulence and radiation are performed to study hybrid rocket combustor flowfields. The computational study is closely coordinated with a companion experimental program using a planar slab burner configuration with HTPB as fuel ...
S. Venkateswaran, C. Merkle
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Laboratory-scale hybrid rocket motor uncertainty analysis
Journal of Propulsion and Power, 1996Laboratory-scale hybrid rocket motors often provide the means to evaluate the burning rates of new fuel formulations. While the issue of scaling to larger sizes can be significant, the uncertainty level of the laboratory-scale results also needs evaluation.
R. A. Frederick, B. E. Greiner
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Results of Labscale Hybrid Rocket Motor investigation
28th Joint Propulsion Conference and Exhibit, 1992This work was performed to establish a labscale hybrid rocket motor test and evaluation capability at NASA Marshall Space Flight Center. The scope included activation of a Labscale Hybrid Motor, determination of baseline burning rates for PMMA fuel, and replication of pressure oscillations for HTPB fuel. The 0.820-in.-diam port, 10-in.-long fuel grains
B. GREINER, R. FREDERICK, JR.
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Design Trade-offs for Hybrid Rocket Motors
48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2012A new method is developed for preliminary design of hybrid rocket motors. A cooperative evolutionary method is used with an indirect approach to perform the coupled optimization of hybrid rocket motor and trajectory for a sounding rocket. Different propellant combinations are considered for a sounding rocket application (microgravity platform).
CASALINO, LORENZO +2 more
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Optimal Design of Hybrid Rocket Motors for Microgravity Platform
Journal of Propulsion and Power, 2008A nested direct/indirect method is used to find the optimal design for a microgravity platform which is based on a hybrid sounding rocket. The direct optimization of the parameters that affect the motor design is coupled with the indirect trajectory optimization to maximize a given mission performance index.
CASALINO, LORENZO +1 more
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Testing and CFD Simulation of Diaphragm Hybrid Rocket Motors
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011Combustion efficiency in standard hybrid rocket motors is usually low. This is due to the poor mixing of the core oxidizer flow with the gasi fied fuel from the walls. Motor scale increase usually worsens this issue. Large and volu metric inefficient post combustion chambers are common devices used to improve efficiency, while mixers are somewhat more ...
BETTELLA, ALBERTO +5 more
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Low Frequency Instability in Labscale Hybrid Rocket Motors
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014Hybrid rocket combustions frequently displayed a sudden amplification of combustion pressures developing into low frequency instability (LFI) with peak frequency of 10~20Hz. A series of experimental test was aimed to study the initiation mechanism of LFI, which was suddenly amplified at a certain condition during the combustion.
Kyung Su Park, Changjin Lee
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Numerical Analyses of Thermal Protection Design in Hybrid Rocket Motors
AIAA Propulsion and Energy 2020 Forum, 2020Hybrid rockets can provide a similar degree of flexibility in the thrust profile as a liquid engine but keeping a much simpler architecture. In addition to deal with only a single liquid propellant, hybrids are often designed with some sort of ablative protection system borrowed from the less flexible solid rockets instead of the more complex ...
Barato F. +3 more
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