温度外推在瞬态高温测试中的应用

Application of Extrapolation in Measuring Transient High-surface Temperature

借助蓝宝石光纤温度传感器和多路数据采集卡,根据传热学的基本原理,建立了瞬态高温的黑体腔外推测试模型,并通过有限差分逼近外推法实现了对瞬态高温的测量。在此基础上,利用氢氧焰来模拟瞬态高温热源,得到了传感器和红外测温仪测得的黑体腔内外膜层温度变化曲线,从而验证了该外推模型及方法的正确性。

A blackbody cavity transient high temperature extrapolation testing model was established,and the measurement for transient high temperature was achieved by finite difference approximation extrapolation method,with the help of sapphire fiber-optic temperature sensor and multi-channel data acquisition card,according to the fundmental principles of heat transfer.On this basis,by Oxy-hydrogen flame simulating the transient high-temperature heat source,the sensors and high-speed infrared thermometer are simultaneously used to measure the temperature changing curves internal and external the black body cavity coat,which proves the correctness of the extrapolation model and method.