Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"rocket engines"”.
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Experimental investigation of microfabricated bipropellant rocket engines
… thrusters of reduced mass will be required. Microrocket engines could provide a low mass, high specific impulse, modular answer to these needs. These small rocket engines would produce thrust of order of 10's of Newtons at a thrust-to-weight of over 1000, over 10 times the thrust-to-weight of …
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Structural Optimization of Regeneratively Cooled Rotating Detonation Rocket Engines
Combustors in rotating detonation rocket engines (RDREs) must withstand prolonged exposure to high heat fluxes (>10 MW/m2 ) and ultrasonic-frequency detonative loading. Regenerative cooling is being considered for thermal management in RDREs, but there is concern that the cooling channels may fail …
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Dynamic models for liquid rocket engines with health monitoring application
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Structural and Thermal Properties of Ignition Resistant Coatings for Reusable Rocket Engines
… formulation, first developed for Russian RD-180 engines, which prevents ignition due to particle impact on ox-turbopump turbine. Ignition resistant environmental barrier coatings are of particular interest for reusable rocket systems, which have recently suffered oxygen compatibility failures. …
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Analysis of a heavy lift launch vehicle design using small liquid rocket engines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Development, testing, and validation of a heat transfer model for bi-propellant liquid rocket engines
… characteristics in a bi-propellant liquid rocket engine is a time and resource intensive process. The highly unpredictable and turbulent nature of the combustion requires complex modeling to predict the temperatures and fluid properties. These properties are required to evaluate material …
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Early Plume Development and NOx Chemistry in LOx/H₂ and LOx/CH₄ Liquid Rocket Engines
Projected rocket launch demand in the next 10 years predicts an order-of-magnitude increase in CO₂-equivalent gasses. Despite this expected increase in launch frequency, the on-Earth environmental impacts of off-Earth missions is still understudied, partially due to the lack of combustion and …
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Investigation of Methods and Devices for Active Thrust Profile Control in Hybrid Rocket Engines through Oxidiser Flow Management
Research on thrust control in hybrid rocket engines (HREs) has gained renewed interest due to the growing demand for microsatellites and small launch vehicle operations, as well as the limitations of solid and liquid propulsion technologies. The ability to optimise the thrust profile is a key …
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The effect of departure from ideality of a multiply ionized monatomic gas on the performance of rocket engines
… of Coulomb interactions on the performance of rocket engines is negligible; but that data obtained from hypersonic arc jet wind-tunnels can be significantly influenced by the presence of the interactions.
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Physics-Informed Neural Networks (PINNS) and Inverse PINNS for the Modeling and Parameter Estimation of Electric Pumps in Liquid-Propellant Rocket Engines
… pump system that is used in liquid-propellent rocket engines. This is accomplished by utilizing Physics-Informed Neural Networks (PINNs) and inverse Physics-Informed Neural Networks (iPINNs). In an extreme system such as a liquidpropellent rocket engine, accurate control and efciency is …
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Design of a Pressure Vessel to Characterize Frictional Ignition of Metals in High-Pressure Oxygen Environments
The components of rocket engines are exposed to environments that are oxygen-rich, reach high-pressures, and cause the abrasion of rotating parts. Studies have shown that these conditions cause nearly all metals to develop an oxide tribolayer, which initially lubricates the rubbing surface, but …
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Random Sphere Packing Model of Heterogeneous Propellants
… tool for the development of safe and reliable rocket engines.
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Assessment of the Thermal Advantages of Biased Supersonic Cooling
… method for hydrogen-fueled, gas-generator cycle rocket engines. The research is intended to serve as an initial proof-of-concept for a biased supersonic film cooling method envisioned for nozzle extension thermal management. The proposed method utilizes a dual-stream injection process that …
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How To Pack Anything
… can make anything, from household tools to rocket engines, so long as the models can be packed into a given enclosure. The denser the packing, the more efficient the print is. Unfortunately, modern packing research has struggled with complex shapes and even proprietary packing software is …
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Controller Design for a Swirl Injection Hybrid Launch Vehicle
… this research arises from the new development of rocket engines which swirl combustion gases to gain combustion stability benefits, and in the case of hybrid rocket engines, fuel regression benefits as well. The stability of the launch vehicle dynamics due to the internal torque has not been …
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Optical Spectroscopy to Determine Intermediate Combustion Product Radicals in a Hydrocarbon Fueled Rocket Engine Exhaust Plume
With the prospect of hydrocarbon-fueled rocket engines, such as Rocket Propellant 1 (RP-1) or methane (CH4) fueled engines being considered for use in future space flight systems, the contributions of intermediate or final combustion products resulting from these hydrocarbon fuels are of great …
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Orbital transfer trajectory optimization
… have led to the adoption of low thrust rocket engines for spacecraft. Optimizing the orbital transfers for low thrust engines is significantly more complicated than optimizing transfers for impulsive engines because a continuous control law must be found and long integrations are …
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Laser-Induced Particle Impact Testing in High-Pressure Oxygen Environments
… hardware for next-generation staged combustion rocket engines.
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Developing Evaluation Measures for the Second Stage Next Generation Engine on Evolved Expendable Launch Vehicles
… engine on EELV, a tradeoff comparison between rocket propulsion engine cycles, a waterfall model for engine qualification and testing of liquid propulsion rocket engines, and testing recommendations for NGE qualification. Additionally, the thesis recommends specific impulse, thrust, and …
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Analyses of flame response to acoustic forcing in a rocket combustor
… combustion instabilities in liquid propellant rocket engines are spontaneously occurring pressure fluctuations that are coupled with unsteady combustion processes. Under the right conditions the unsteady fluctuations can grow to a point where they affect the operation of the combustion chamber. …
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