基于流固热耦合仿真的微型空压机风冷系统  

Micro-compressor air-cooling system based on fluid-solid thermal coupled simulation

作　　者：陈建栋[1] 孙蓓蓓[1] 

机构地区：[1]东南大学机械工程学院,南京211189

出　　处：《东南大学学报（自然科学版）》2013年第1期65-70,共6页Journal of Southeast University：Natural Science Edition

基　　金：江苏省"六大人才高峰"资助项目(1102000137)

摘　　要：为解决微型空压机缸盖处过热问题,基于流固耦合传热理论,建立了微型空压机内部流场和温度场以及轴流式风扇的数值计算模型.数值仿真结果表明,原空压机流道设计不合理,冷却空气在机架处回流严重,影响缸盖散热.通过改变轴流式风扇的吹风方向解决了冷却空气在机架处回流的问题,通过优化出风口尺寸以及风扇参数,提高了冷却空气的流量,从而使微型空压机冷却空气流量由13.55 g/s增加至23.51 g/s,缸盖处温度由388.9 K降低至362.9 K,解决了缸盖处过热的问题.In order to solve the overheating of micro-compressor cylinder cover, a numerical model to compute airflow field and temperature field is set up according to the theory of fluid-solid coupled heat transfer. A numerical model of axial-flow fan is also set up. The numerical simulation results show that the airflow channel design of the original micro-compressor is unreasonable, and the re- flow of cooling air at motor frame is severe which affects the cooling performance of cylinder cover. By changing the blowing direction of the axial-flow fan, the problem of cooling air reflow is solved. Also, by optimizing the size of outlets and the parameters of the fan, the flow of cooling air is in- creased. Through these measures, the flow of cooling air is increased from 13.55 g/s to 23.51 g/s, and the temperature of cylinder is decreased from 388.9 K to 362.9 K. Thus, the overheating of mi- cro-comoressor cvlinder cover is solved.

关 键 词：微型空压机 流固热耦合仿真 数值仿真 轴流式风扇 

分 类 号：TH457[机械工程—机械制造及自动化]