The effects of LOX post biasing on SSME injector wall compatibility

Strakey, Peter; Talley, Douglas G.; Tseng, L. K.; Miner, K. I.

doi:10.2514/6.1999-2888

Cited by 1 publication

(1 citation statement)

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“…The momentum flux of the outer stream is augmented and this accelerates the liquid core breakup and improves its atomization thus augmenting the flame expansion rate. It has also been found in cold-flow experiments at low pressures, Strakey et al (2002), that post biasing may be used to shift the liquid flux distribution away from the chamber wall. There is some experimental evidence in the form of visualizations under hot fire conditions of the liquid oxygen stream indicating that recess also enhances long wavelength instabilities.…”

Section: Effect Of Recess On Transcritical Lox/gh 2 Flamesmentioning

confidence: 96%

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure

Candel

Juniper

Singla

et al. 2006

Combustion Science and Technology

129

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A detailed understanding of liquid propellant combustion is necessary for the development of improved and more reliable propulsion systems. This article describes experimental investigations aimed at providing such a fundamental basis for design and engineering of combustion components. It reports recent applications of imaging techniques to cryogenic combustion at high pressure. The flame structure is investigated in the transcritical range where the pressure exceeds the critical pressure of oxygen ðp > p c ðO 2 ¼ 5:04 MPaÞÞ but the temperature of the injected liquid oxygen is below its critical value ðT O2 < T c ðO 2 Þ ¼ 154 KÞ. Data obtained from imaging of OH Ã radicals emission, CH Ã radicals emission in the case of LOx=GCH 4 flames and backlighting provide a detailed view of the flame structure for a set of injection conditions. The data may be used to guide numerical modelling of transcritical flames and the theoretical and numerical analysis of the stabilization process. Calculations of the flame edge are used to illustrate this aspect. Results obtained may also be employed to devise engineering modelling tools and We wish to thank CNES, Snecma and CNRS for their continuous support of our work in rocket propulsion. The assistance of the ''Mascotte'' team of Onera under the leadership of Lucien Vingert and Mohamed Habiballah is gratefully acknowledged.

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Section: Effect Of Recess On Transcritical Lox/gh 2 Flamesmentioning

confidence: 96%