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STRUCTURE AND DYNAMICS OF CRYOGENIC FLAMES AT SUPERCRITICAL PRESSURE

机译:超临界压力下低温火焰的结构和动力学

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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 (p > p_c(O_2 = 5.04 MPa)) but the temperature of the injected liquid oxygen is below its critical value (T_(O_2) < T_c(O_2) = 154 K). Data obtained from imaging of OH~* radicals emission, CH~* 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 methodologies for component development aimed at improved efficiency and augmented reliability.
机译:对液体推进剂燃烧的详细理解对于开发改进的和更可靠的推进系统是必要的。本文介绍了旨在为燃烧组件的设计和工程提供此类基础的实验研究。它报道了成像技术在高压下低温燃烧中的最新应用。在压力超过氧气的临界压力(p> p_c(O_2 = 5.04 MPa))但注入的液氧温度低于其临界值(T_(O_2)

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