基于响应面法的结构参数对引射器引射系数影响的仿真研究  

Simulation Study of Influence of Structural Parameters on Entrainment Coefficient of Ejector Based on Response Surface Method

作　　者：贾德民 王晓艳 王培伦 于彬彬 徐煜 陈修旻 赵建辉[2] JIA Demin;WANG Xiaoyan;WANG Peilun;YU Binbin;XU Yu;CHEN Xiumin;ZHAO Jianhui(State Key Laboratory of Engine Reliability,Weichai Power Co.,Ltd.,Weifang 261001,China;College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]潍柴动力股份有限公司内燃机可靠性国家重点实验室,山东潍坊261001 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《西南交通大学学报》2024年第5期1167-1175,共9页Journal of Southwest Jiaotong University

基　　金：内燃机可靠性国家重点实验室开放基金(skler-202012)。

摘　　要：为分析引射器引射系数的显著影响因素,建立以空气为介质的引射器二维可压缩流动数值模型,基于实验数据完成了引射器模型计算准确性的校核验证.采用D最优实验设计方法设计计算矩阵,基于最小二乘法构建二阶形式的引射系数响应面预测模型,并基于响应面预测模型开展了引射系数显著参数及参数交互作用的仿真分析.研究结果表明:引射系数预测值和计算值的吻合性证明了响应面预测模型的准确性;扩压段长度、混合段长度、混合段直径和喷嘴出口到混合段入口距离的交互、混合段直径和混合段长度的交互、混合段长度和扩压段扩散角的交互是引射器引射系数的关键影响因素,因其对引射系数影响的P值小于0.001;扩压段扩散角、喷嘴出口到混合段距离和扩压段长度的交互、混合段长度和喷嘴出口到混合段距离的交互对引射系数具有重要的影响,是引射系数影响的主要参数;在参数显著交互作用中,影响引射系数的显著因素是变化的,取决于显著交互作用双参数的取值范围.To analyze the significant influencing factors of the entrainment coefficient of the ejector,a twodimensional numerical model of the compressible flow of the ejector with air as the working medium was established,and its calculation accuracy was validated by the experimental data.Meanwhile,the calculation matrix was designed by utilizing the D-optimal experimental design method.Based on the least-squares method,the response surface prediction model of the entrainment coefficient with a second-order form was constructed,and the significant parameters of the ejection coefficient and their interaction were simulated based on the constructed model.The research results show that the coincidence between the predicted and calculated values of the entrainment coefficients proves the accuracy of the response surface prediction model;the interaction between the length of the diffuser section,the mixing section length,the diameter of the mixing section,and the distance from the nozzle outlet to the inlet of the mixing section,the interaction between the mixing section diameter and mixing section length,and the interaction between the mixing section length and the diffusion angle of the diffuser section are the key factors affecting the entrainment coefficient because their P-values are less than 0.001.Meanwhile,the interaction of the diffusion angle of the diffuser section,the distance from the nozzle outlet to the inlet of the mixing section and the length of the diffuser section,and the interaction between the length of the mixing section and the distance from the nozzle outlet to the inlet of the mixing section have an important influence on the entrainment coefficient.Therefore,they are the main parameters affecting the entrainment coefficient.In addition,it is found that among the significant interaction of parameters,the significant factors affecting the entrainment coefficient will change with the value range of the two parameters with significant interaction.

关 键 词：引射系数 参数敏感性分析 引射器 响应面模型 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]