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酚醛树脂作为一种烧蚀材料,凭借其耐高温的特性应用于航天器防热系统,其防热性能在工程实际中需进行考核。以某航天器一段包覆80纤维布/酚醛树脂的液路管路作为研究对象,以定热流为边界条件,采用仿真计算和热流试验的研究方法对空导管以及注水导管的温度场进行研究:仿真计算得出导管表面平衡温度分布以及导管表面具有代表性某点瞬态温度变化;为验证仿真计算的准确性,进行了热流试验,得出了导管表面以及水中温度测点的瞬态温度变化;根据热流试验的温度结果,分析比对了热流试验对仿真计算的验证情况。研究结果表明:80纤维布/酚醛树脂的防热性能符合温度指标要求;仿真结果和热流试验结果一致度良好,证明了仿真计算的合理性和准确性。
As a kind of ablative material, phenolic resin is applied to spacecraft heat-protection system by virtue of its high temperature resistance. Its heat-proof performance needs to be evaluated in engineering practice. Taking a section of spacecraft pipeline covering 80 fiber cloth / phenolic resin as the research object, taking the constant heat flux as the boundary condition, the temperature field of the air pipe and the water injection pipe was studied by means of simulation and heat flow test. The temperature distribution on the surface of the catheter and the transient temperature change on the surface of the catheter were obtained through simulation calculation. To verify the accuracy of the simulation calculation, the heat flow test was carried out and the transient temperature changes on the catheter surface and the water temperature measuring point According to the temperature results of the heat flow test, the simulation verification of the heat flow test is analyzed and compared. The results show that the heat resistance of 80 fiber cloth / phenolic resin conforms to the requirements of temperature index. The simulation results are in good agreement with the heat flow test results, which proves the rationality and accuracy of the simulation calculation.