基于红外测温的油罐多相界面传热反问题识别方法

Inverse heat transfer algorithm for multi-phase interface detection of oil tank based on infrared imaging temperature measurement

利用红外热像仪测量储罐多相界面是一种比较理想的测量方法。通过建立储罐的传热模型,利用有限体积法对筒体外表面的温度分布进行了数值模拟,并提出了基于筒体外表面温度分布对筒内多相界面进行定量识别的传热反问题识别方法,同时分析了初始假设、测量误差和表面最大温差对多相界面识别精度的影响。计算结果表明:在工程允许的测量误差范围内(σ=2℃),利用红外测温反演估计储罐多相界面及罐内流体温度具有很高的识别精度。该方法为油罐多相界面和内部温度识别提供了一种新的思路和途径。

The use of infrared imaging measurements tanks multiphase interface is an ideal measurement method. In this paper, the mathematical and physical model of storage tank heat transfer was built;temperature distribution of external surface of the tank was solved by finite volume method. An inverse heat transfer algorithm for multi - phase interface detection of oil tank was proposed, based on temperature distribution of external surface of the tank ; the effects of initial guess, measurement error （σ） and surface maximum temperature difference on the level detection results were studied. The results show that：within the range of engineering acceptable measurement error （σ=2℃）, the inversion liquid level has a high accuracy. It provides one kind of new thought and way for multi - phase interface detection of oil tank.