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一、序言辐射传热在宇航工业中起着重要的作用。人造卫星和宇宙飞船以极高速度返回大气层时,由于空气动力加热使飞行体表面温度急剧升至很高温度,太阳能辐射析出的热量也会引起温度上升。排除这种热量最适当的方式是利用低辐射系数材料和涂层使温度降到最低限度。为此,我们研究了金属材料和涂层的热辐射性能。结果表明,铂铑合金(Pt Rh20)以及钼基合金(MoTi0.5)上的铑铂复合涂层在1800K的全辐射系数小于0.205,在大气中可
First, the preamble radiation heat transfer in the aerospace industry plays an important role. When satellites and spacecraft return to the atmosphere at very high velocities, the surface temperature of airplanes rises sharply to very high temperatures due to aerodynamic heating, and the heat radiated by the solar radiation also causes a temperature increase. The most appropriate way to eliminate this heat is to use low emissivity materials and coatings to minimize the temperature. To this end, we studied the thermal radiation properties of metallic materials and coatings. The results show that the total emissivity of the rhodium-platinum composite coating on Pt Rh20 and MoTi0.5 alloys is less than 0.205 at 1800K. In the atmosphere,