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On the Experimental Simulation of Ultra-high Temperature,High Heat Flux and Nonlinear Aerodynamic Heating Environment and Thermo-machanical Testing Technique

WU Da-fang,PAN Bing,GAO Zhen-tong,MU Meng,ZHU Lin,WANG Yue-wu(School of Aeronautics Science and Engineering,Beihang University,Beijing 100191,China)  
Experiment simulation technique for ultra-high temperature,high heat flux and nonlinear aerodynamic thermal environment and corresponding extreme high temperature environment mechanical testing techniques are the key point in the design of hypersonic vehicle thermal protection material and structural safety,which is related to the success or failure of vehicle development.Principle and capability of a home-developed quartz lamp infrared radiation-based aerodynamic heating simulation system is introduced in this paper.This system is capable of producing nonlinear dynamic thermal shock process with heat flux of 2MW/m2,heating rate up to 210℃/s,and highest temperature up to 1500℃.A number of experiments were performed based on the home-developed heating simulation system.These experiments include but not limited to:(1) new method of insensitive to ambient light change active imaging digital image correlation was proposed.By using non-contact optical metrology,full-field high-temperature deformation can be measured up to 1550℃.(2) fracture property testing of composite material SiC/SiC specimen in thermal environment up to 1400℃ was accomplished.Some experimental studied are also demonstrated briefly in this paper,such as thermal-vibration test for wing structure of high-speed cruise missile and experimental and numerical investigation of heat-shielding properties of honeycomb panel structure in non-linear thermal environment up to 950℃.Above-mentioned aerodynamic heating simulation system and mechanical testing methods have great military engineering application values in the design of hypersonic flight vehicle and aerospace and aeronautics fields.
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