大温差强对流条件下壁温测量偏差分析

为了提高防冰试验时进气道壁温测量结果的准确度,需要考虑传热对结果的影响。本文建立了温度测量方案的传热模型,计算了由传热引起的壁温测量偏差。计算结果表明,大温差强对流的试验环境使得测温偏差较大,导致测得温度偏低。本文分析讨论了显著影响测温偏差的因素,提出了相应地减小测温偏差的测量方案。

Wall Temperature Measurement Error Analysis in LargeTemperature Difference and Strong Convection Condition

In order to increase the accuracy of wall temperature measurement of inlet in the anti-icing test, the effect of heat transfer to the measurement result should be considered. The heat transfer model of the measurement scheme is constructed, and the measured wall temperature error by heat transfer is calculated. The result shows that in the environment of large temperature difference and strong convection, the measured wall temperature error is greater, so that the measured temperature is lower. Other conditions which wall temperature measurement error exists are also discussed. The scheme of minimizing wall temperature measurement error is presented in the end.