碳基复合材料超高温热化学烧蚀过程的数值模拟

刘志刚; 梁军; 张巍

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航空材料学报 ›› 2006, Vol. 26 ›› Issue (5) : 91-95.

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论文

碳基复合材料超高温热化学烧蚀过程的数值模拟

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Numerical Simulation of High Temperature Thermal Chemical Ablation for Carbon Composite Material

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摘要

对超高温热化学烧蚀的计算方法进行了研究,对碳基复合材料在不同环境下热化学烧蚀过程进行了数值模拟,对烧蚀产物进行了计算。计算表明,碳基复合材料在烧蚀过程中依次出现氧化、升华过程。10atm下,氧化、升华过程交替温度为330K。压力升高,交替温度也依次升高。氧化产物为CO,而升华产物依次为C3、C1。在3300K以下,烧蚀主反应为2C+O2→2CO。在3300K以上,烧蚀主反应为:2C+O2→2CO,2C+N2→2CN,i(C)→Ci(g)i=1,3。并用哈尔滨工业大学研制的“星形”等离子发生器及国产的等离子体火炬进行了碳基复合材料烧蚀实验。实验光谱检测结果与超高温热化学烧蚀计算的烧蚀产物一致,验证了超高温热化学烧蚀计算的正确性。

Abstract

The calculation method of thermal chemical ablation was discussed in the paper.Numerical simulation of high temperature thermal chemical ablation for carbon composite material was done and the ablation results were calculated.The processes of oxidation and sublimation were appered in the ablation for carbon composite material.The alternant temperature of oxidation and sublimation was 3300K under 10atm.The alternant temperature would raised when pressure raised.The result of oxidation was CO.The result of sublimation was C3 and C1 gradually.The main reaction was 2C+O2→2CO under 3300K.The main reactions were 3C+O2→2CO,2C+N2→2CN and i(C)→Ci(g)i=1、3 above 3300K.The results were consistent with that of spectrum dignoses,which confirm the valid of thermal chemical calculation by minimum free energy method further.

导出引用

刘志刚, 梁军, 张巍. 碳基复合材料超高温热化学烧蚀过程的数值模拟[J]. 航空材料学报, 2006, 26(5): 91-95

LIU Zhi-gang, LIANG Jun, ZHANG Wei. Numerical Simulation of High Temperature Thermal Chemical Ablation for Carbon Composite Material[J]. Journal of Aeronautical Materials, 2006, 26(5): 91-95

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