氧化锆纤维高温隔热材料传热性能研究

Study on Heat Transfer Performance of Zirconia Ceramic Fiber Thermal Insulation Material at High Temperature

氧化锆纤维有着很好的力学性能与热学性能,在航空、航天等尖端科技领域有着广阔的应用前景。通过数值分析和试验研究了氧化锆陶瓷纤维隔热材料内部传热机理,分析氧化锆纤维导热、对流、辐射换热在不同温度和环境压力下的影响和传热占比,评估温度对氧化锆纤维隔热材料表征导热系数的影响,结合氧化锆纤维隔热材料高温隔热对比试验结果,指导氧化锆陶瓷纤维用于超高温隔热的优化方向。

Because of its excellent mechanical and thermal properties,zirconia fiber is widely used in aviation,aeros pace and other advanced science and technology fields.The application prospect is more and more broad.The heat transfer mecha-nism of zirconia ceramic fiber thermal insulation material was studied by numerical analysis and experiment.The influence of temperature on the thermal conductivity of zirconia fiber thermal insulation materials was evaluated by analyzing the in-fluence of heat conduction,convection and radiation heat transfer under different tem peratures and environmental pressures and the heat transfer ratio.Then com bined with the thermal insulation contrast test results of zirconia fiber thermal insula-tion material,,the optimization direction of zirconia ceramic fiber used in ultra-high temperature thermal insulation is guided.