基于Kriging模型的水中放电沉积能量优化分析

Deposited energy optimization analysis of discharge in water based on Kriging model

水中脉冲放电过程较为复杂,放电参数与放电沉积能量之间没有明确的函数关系。为了获得最佳沉积能量,明晰不同放电参数相互作用对沉积能量的影响,获得最佳放电参数组合,本文搭建了水中高压脉冲放电实验平台,结合Kriging代理模型探究了电压、电极间距和电导率三种放电参数对水中放电沉积能量的影响;利用遗传算法进行全局寻优,确定了最佳放电参数组合。研究结果表明:通过交叉验证评估该模型的均方根误差为6.95%,满足精度要求;外加电压一定时,在电极间距和电导率的协同作用下,沉积能量的变化呈现多峰值特性;在电压、电极间距和电导率分别为17 kV、2.28 mm和0.8 mS/cm的条件下产生的沉积能量最大,为最佳参数组合;通过实验验证了在最佳点的预测值和实际值相对偏差在8%以内。

The pulsed discharge process in water is complex and there is no clear functional relationship between the discharge parameters and the discharge deposition energy.To obtain the optimum deposition energy,clarify the influence of different discharge parameters on the deposition energy and obtain the best combination of discharge parameters,this paper builds a high-voltage pulse discharge test platform in water and investigates the influence of three discharge parameters,namely voltage,electrode spacing and conductivity,on the deposition energy of discharge in water by combining with the Kriging agent model.The optimal combination of discharge parameters was determined by using a genetic algorithm.The results of the study show that:the root mean square error of the model is 6.95%,which satisfies the accuracy requirement through cross-validation;the deposition energy varies with multiple peaks under the synergistic effect of electrode spacing and conductivity at a certain applied voltage;the best combination of voltage,electrode spacing and conductivity is 17 kV,2.28 mm and 0.8 mS/cm respectively,which produces the highest deposition energy.The relative deviation between predicted and actual values at the optimum point were experimentally verified to be within 8%.