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本文简要地叙述了测取瞬态温度的困难,提出了一种以有限尺寸的感温元件来测取瞬态温度的方法。本方法是在对实测瞬态温暖进行傅立时离散的基础上,对逐个简谐给以修正,然后对各修正了的简谐曲线进行迭加,这迭加而成的曲线即为瞬态温度的真实值。从感温元件热平衡更一般的表达式出发,导得了第三类边界条件中燃气的瞬态温度和壁面的瞬态温度的表达式。
This article briefly describes the difficulty of measuring the transient temperature and proposes a method of measuring the transient temperature with a finite-size temperature sensing element. The method is based on the discrete Fourier transform of the measured transient warmth, and then modifies the simplified harmonic one by one, and then adds the modified simplified harmonic curves. The superposed curve is the transient temperature The real value. Starting from the more general expression of heat balance of temperature sensing element, the expression of the transient temperature of gas and the transient temperature of the wall in the third type of boundary conditions is derived.