The Testing Simulation Technology Investigation on the Thermal Environment of Engine Combustor Wall Material

摘要：

　　Thermal protection technology of engine combustor is one of the key technologies.When the fuel is burning,the combustor inner wall is confronted with severe aero-heating,the passive,semi-passive,or actively-cooled thermal protection structures have been used to prevent the combustor from destroying.The focus of this paper is on the thermal environment simulation of engine combustor inner wall in the ground experiment facility.The inner flow and outer flow thermal environment has usually taken place in the inner surface of engine combustor and the outer surface of hypersonic vehicle,respectively.These two kinds of thermal environments have been compared by using the supersonic rectangle Turbulent Flow Duct(TFD)and arc heater.The cold-wall heat flux was measured and the engine combustor inner wall material was tested in these two kinds of thermal environments.Due to the effect of thermal radiation heat transfer,the cold-wall heat flux of inner flow is respectively higher 21%and 40%than that of outer flow in two kinds of representative flow conditions.And the increments of the cold-wall heat fluxes are nearly equivalent,about 0.70~0.80MW/m2.So when the cold-wall heat flux increases,the effect of radiation heat transfer will gradually decrease.In material test experiment,the surface and rear temperature of the C/SiC composites in the inner flow is respectively higher about 313℃ and 160℃ than those with same formulation design in the outer flow,which is very significant to test the engine combustor inner wall material and must be considered in the combustor material test experiment.The arc-heated double-models supersonic rectangle TFD experimental technology can commendably simulate the inner flow thermal environment of the engine combustor.The passive,semi-passive and active thermal protection structures of combustor can be tested by this technology for the thousands-scale exposure periods.

关键词： Engine combustor Inner flow thermal environment Outer flow thermal environment Turbulent flow duct Arc heater

作者: Tu Jianqiang Chen Lianzhong Zhang Youhua

作者单位: China Academy of Aerospace Aerodynamics,Beijing 100074,China

会议类型: 国际会议

会议名称: 2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)

会议地点: 上海

会议语种:英文

页码: 1-6

在线出版日期: 2014-09-24（万方平台首次上网日期，不代表论文的发表时间）