An experimental study of effective thermal conductivity of high temperature insulations

作者：Zhang, Bo-ming^*; Me, Wei-hua; Du, Shan-yi; Zhao, Shu-yuan

来源：Journal of Heat Transfer, 2008, 130(3): 034504.

DOI：10.1115/1.2804946

• effective thermal conductivities
• heat transfer
• high temperature insulation
• in-plane thermal conductivity

An experimental apparatus was designed and fabricated to measure the effective thermal conductivities and simulate the temperature and pressure history of reentry of a launch vehicle into a planetary atmosphere with a maximum temperature of 1600 degrees C An improved testing method was used to test the thermal conductivities of an alumina fibrous insulation at environmental pressures from 0.03 Pa to 10(5) Pa with the average temperature of the sample increased to 864 degrees C and its density being 128 kg/m(3). A method based on temperature difference is used to compute the in-plane effective thermal conductivity, and the result shows that the in-plane thermal conductivity along the y axis is 1.47 times that along the x axis. The influences of temperature and pressure on the contribution of three heat transfer mechanisms to the effective thermal conductivities were compared.

• 出版日期2008-3
• 单位哈尔滨工业大学