Research on heat flux estimation method based on particle swarm optimization
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摘要:
针对不同材料模型表面热流辨识问题,通过引入热物性特征系数,基于能量守恒原理和傅里叶传热定律推导了双点测温热阻式热流传感器辨识热流的通解,提出了一种采用粒子群算法优化求解双点测温热阻式热流传感器通解的方法。为了说明该方法的有效性,建立双点测温热阻式热流传感器仿真传热模型,分别对铜、高温合金、碳化锆3种材料制作的传感器的热物性特征系数进行优化求解,得到了3种材料传感器热流辨识的具体求解方法。然后结合3种热流测试应用场景需求,得到不同测试场景下3种材料传感器的辨识热流与加载热流误差均小于1%,表明提出的基于粒子群算法的热流辨识方法有较好的辨识精度。
Abstract:With respect to the problem of heat flux estimation of different material model surfaces, by introducing the thermophysical characteristic coefficients, the general solution of heat flux estimation for the thermo-resistance heat flux sensor with two temperature points was derived based on the principle of energy conservation and Fourier heat transfer law. And a particle swarm method of optimizing the general solution of the thermo-resistance heat flux sensor with two temperature points was proposed. In order to illustrate the effectiveness of this method, a heat transfer simulation model of the thermo-resistance heat flux sensor with two temperature points was established. The thermophysical characteristic coefficients of sensors made of copper, superalloy and zirconium carbide were optimized respectively, and the specific heat flux estimation methods of sensors made of three materials were obtained. Then according to three application requirements of heat flux test, the heat flux error of each sensor between estimated and loaded heat fluxes in different test scenarios was less than 1%. The results showed that the proposed heat flux estimation method based on particle swarm optimization had better estimation accuracy.
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表 1 不同热流下的适应度
Table 1. Fitness under different heat flux values
热流/
(kW/m2)最优适应度 热物性特征系数 200 0.634 (1.097,0.536,0.310,0.998) 400 0.633 (1.097,0.549,0.300,0.999) 800 0.632 (1.081,0.567,0.300,0.999) 1200 0.632 (1.085,0.556,0.307,0.999) 1600 0.633 (1.090,0.542,0.300,1.000) 2 000 0.635 (1.083,0.564,0.300,1.000) -
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