Technologies for Thrust Chambers of Future Launch Vehicle Liquid Rocket Engines

Immich, H.; Alting, J.; Kretschmer, J.; Preclik, D.

doi:10.2514/6.2002-4143

Cited by 2 publications

(2 citation statements)

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“…However, this type of injector results in high local heat fluxes on the injector faceplate and the chamber wall near the faceplate [10]. To obtain a high-flowrate injector element, Immich and Haeseler used different numbers of shear coaxial elements in a chamber under the same conditions [11,12]. To reduce the costs of the gas-generator, tri-coaxial elements were applied in gas-generators [13] to decrease the number of injector elements, but this type of element has a complicated configuration and may add additional complexity in the form of an of extra oxidizer dome or in the design and manufacturing difficulty of the element itself, so its application in main combustion chambers is very limited.…”

Section: Introductionmentioning

confidence: 99%

“…The reduction of injector element numbers results in more simplicity, lower cost or even higher reliability for the engine design. Thus, reducing the number of elements in future high-performance engines has become a goal of injector researcher [9][10][11][12][13]. Tamura introduced the swirl coaxial injector in the H 2 /O 2 engine main chamber to enhance the mixing and increase the flowrate per injector element.…”

Section: Introductionmentioning

confidence: 99%

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High flowrate injector with gaseous hydrogen and gaseous oxygen

Wang

Cai

Gao

et al. 2011

Sci. China Technol. Sci.

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In order to get a high flowrate gas-gas injector and its design methodology, the combustion flow field of a typical shear-coaxial injector was analyzed firstly. The dimensional analysis was applied in the phenomenon of gas-gas combustion, and design parameter optimization and a structure improvement were also carried out. A high flowrate single-element injector with high H 2 /O 2 momentum ratio and tapered O 2 post tip was obtained and validated by both numerical and experimental studies. This high flowrate injector has simple construction and it can effectively enhance the mixing, decrease the combustion completion length and also has a benign heat environment. Furthermore, based on the study of the single-element injector, numerical optimization and validation experiments were conducted successively on a multi-element injector equipped with high flowrate injection elements. The multi-element injector with the high flowrate elements started up and shut down smoothly, and operated steadily without any stability aids. In the combustor designed with nominal parameters, this injection element can obtain high combustion efficiency with a flowrate of 3.7 times that of SSME main injector element and shows a benign chamber wall heat compatibility. This injector design and the design methodology can become a reference for the design of other types of injectors for liquid rocket engines. liquid rocket engine, gas-gas injector, shear-coaxial injector,, Large Eddy Simulation, subscale combustor, experiment Citation: Wang X W, Cai G B, Gao Y S, et al. High flowrate injector with gaseous hydrogen and gaseous oxygen.

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