车用柴油机空气滤清器的流场分析及结构优化  

Flow Field Analysis and Structure Optimization of Diesel Engine Air Filters for Vehicles

作　　者：张佳佳 郭展宏 张浩清 王旭峰[1,2] ZHANG Jiajia;GUO Zhanhong;ZHANG Haoqing;Wang Xufeng(College of Mechanical and Electrical Engineering,Tarim University,Alar 843300,China;Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region,Alar 843300,China)

机构地区：[1]塔里木大学机械电气化工程学院,新疆维吾尔自治区阿拉尔市843300 [2]新疆维吾尔自治区教育厅普通高等学校现代农业工程重点实验室,新疆维吾尔自治区阿拉尔市843300

出　　处：《内燃机》2023年第4期26-32,共7页Internal Combustion Engines

基　　金：塔里木大学校长基金青年项目(TDZKSS202120)。

摘　　要：针对南疆风沙环境下采棉车辆所装配的双级空气滤清器堵塞问题展开分析。采用流体力学软件FLUEN建立空气滤清器流场分析模型,利用k-epsilon湍流模型进行数值仿真,重点研究空气滤清器内部结构对空气流动的影响。同时,以降低空气滤清器内部的流动阻力为目的,进行结构参数改进及仿真对比验证。结果表明:改进空气滤清器进排气口的尺寸、位置、处理空气滤清器内腔圆角能够改善空气滤清器内部流场,减少腔内涡流现象和进排气口的压力差,从而使整体的气体流动更加顺畅,该研究为优化采棉机用空气滤清器的工作性能提供了理论依据。The analysis is carried out for the clogging problem of the dual-stage air filters fitted to cotton picking vehicles in the windy and sandy environment of South Xinjiang.The fluid dynamics software FLUEN is used to establish the flow field analysis model of the air filter,and the k-epsilon turbulence model is used for numerical simulation,focusing on the influence of the internal structure of the air filter on the air flow.At the same time,to reduce the flow resistance inside the air filter for the purpose of structural parameter improvement and simulation comparison verification.The results show that improving the size and location of the air filter inlet and exhaust ports and dealing with the rounded corners of the air filter internal cavity can improve the internal flow field of the air filter,so that the vortex phenomenon in the cavity is reduced,the pressure difference between the inlet and exhaust ports is reduced,and the overall gas flow is smoother,and the related work provides a theoretical basis for the optimization of the working performance of the air filter for cotton pickers.

关 键 词：空气滤清器 k-epsilon湍流模型 流场分析 结构改进 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]