CAJ | 학술논문

利用超声速矩形湍流导管和等离子电弧加热器模拟内外流热环境，通过冷壁热流测量和热防护材料考核对比分析二者的差异。结果表明：由于辐射换热的影响，在选取的两个来流条件下，内流热环境下的冷壁热流比外流热环境下的分别高出41.6%和20.4%。随着冷壁热流的增加，辐射换热的影响力会逐渐减小。在材料考核试验中，相同配方工艺和涂层设计的C/C复合材料在内流热环境下的表面温度高出313℃，背面温度高出160℃，材料表面出现明显烧蚀；而在外流热环境下材料表面完好。因此在气动热考核试验中，需要充分考虑辐射换热的影响，根据材料所处的热环境选择不同的地面试验模拟方法。
이용초성속구형단류도관화등리자전호가열기모의내외류열배경，통과랭벽열류측량화열방호재료고핵대비분석이자적차이。결과표명：유우복사환열적영향，재선취적량개래류조건하，내류열배경하적랭벽열류비외류열배경하적분별고출41.6%화20.4%。수착랭벽열류적증가，복사환열적영향력회축점감소。재재료고핵시험중，상동배방공예화도층설계적C/C복합재료재내류열배경하적표면온도고출313℃，배면온도고출160℃，재료표면출현명현소식；이재외류열배경하재료표면완호。인차재기동열고핵시험중，수요충분고필복사환열적영향，근거재료소처적열배경선택불동적지면시험모의방법。
Outer and inner flow thermal environment have been compared by measuring the cold-wall heat flux and testing the thermal protection material in the supersonic rectangle turbulent duct and arc heater. Due to the effect of radiation heat transfer, the cold-wall heat flux in the inner flow environment is respectively higher 41.6%and 20.4%than that in the outer flow environment under two kinds of representative flow conditions. When the cold-wall heat flux increases, the effect of radiation heat transfer will gradually decrease. In test experiment of thermal protection material, the surface of the composites in the inner flow is 313℃higher than those in the outer flow with same formulation and coating design, and rear temperature is 160 ℃higher. The composites surface in the inner flow has been ablated obviously, but the composites surface in the out flow is very well. So the radiation heat transfer must be adequately considered in the aerothermodynamic ground experiment, and the simulation method will be chosen depends on the thermal environment of thermal protection material.