基于虚拟风洞的装载机动力舱热环境预测分析  

Thermal environment prediction of loader engine cabin in a virtual wind tunnel

作　　者：张钦国[1] 秦四成[1] 杨立光[2] 马润达 刘宇飞[3] 李武[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]水利部长春机械研究所,长春130012 [3]吉林大学汽车工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2016年第1期50-56,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50775096);国家科技支撑计划项目(2013BAF07B04)

摘　　要：为了改善装载机动力舱热环境,提高散热器的换热性能,保证整车工作的稳定性,以轮式装载机为研究对象,按照实际尺寸建立三维计算模型,采用虚拟风洞和数值模拟相结合的研究方法,预测排气系统对动力舱热环境和散热器性能的影响,并比较了在两种排气系统结构下散热器的换热效率。仿真结果与试验结果比较吻合,证明了计算模型的有效性。计算结果表明:采用隔热排气系统能够明显降低动力舱内空气的温度,改善舱内热环境,液压油散热器换热性能提高9.0%,水散热器换热性能提高7.3%,传动油散热器换热性能提高6.8%。研究结果对装载机整车热管理技术提供了指导。In order to improve the thermal environment of the loader engine cabin and the heat transfer performance of the radiators to ensure the stable vehicle performance,a 3-D physical model of the loader was built.Virtual wind tunnel and numerical simulation were used to predict the influence of the exhaust system on the cabin thermal environment and radiator performance.The heat transfer power of the radiators was compared under two kinds of exhaust system.Analysis results show reasonable agreement with experiment results,which proves the accuracy of the model.Simulation results show that using insulated exhaust system could significantly reduce the air temperature in the engine cabin.The thermal environment of the engine cabin was improved.The heat transfer performances of the hydraulic oil radiator,the water radiator and the transmission oil radiator ware increased by 9.0%,7.3%and 6.8%,respectively.The results of this work may provide guidance for vehicle thermal management of the loader.

关 键 词：车辆工程 轮式装载机 虚拟风洞 数值分析 整车热管理 

分 类 号：U415.52[交通运输工程—道路与铁道工程]