满足国Ⅱ和国Ⅲ排放标准的装载机动力舱空气流场分析  

Air Flow Field Analysis of Loader Engine Compartment to Meet the National Emission Standards Ⅱ and Ⅲ

作　　者：马润达 陈彬彬[1] 秦四成[1] 王袭明 冯鑫[1] 吴阳[1] 

机构地区：[1]吉林大学机械科学与工程学院

出　　处：《工程机械》2015年第11期34-40,7-8,共7页Construction Machinery and Equipment

基　　金：国家科技支撑计划项目(2013BAF07B04)

摘　　要：Ⅰ对为满足国Ⅱ和国Ⅲ排放标准而采用不同配置的某款装载机动力舱的空气流场特性进行研究,利用UG建立冷却风扇风室模型,并采用FLUENT分别对两种散热模块进行仿真,分析散热模块的阻力特性和散热特性。研究表明:相比国Ⅱ排放标准,满足国Ⅲ排放标准的装载机冷却液散热器压降和系统总压降分别降低12.65%和14.49%,液压油温降增加3.82℃,冷却液和传动油温降分别减少0.65℃和4.67℃,空气流速不均匀系数有所减小,冷却液散热器入口表面高温区域较小。In order to meet the national standards Ⅱand Ⅲ for engine emission a study was done on air flow-field in the power chamber of a loader with various configurations by utilizing UG to construct an air chamber model for the cooling fan while using FLUENT to simulate 2 types of radiating module,respectively,before analyzing resistance and radiating features.The study shows that when comparing with the Standard Ⅱ the loader can meet the Standard Ⅲ by lowering the radiator's and the system's total pressure by12.65%andl4.49%,respectively,while3.82℃,0.65℃ and 4.67℃ more of temp can be decreased from to the hydraulic oil,the coolant and the transmission oil.respectively.At the same time un-even air flow speed coefficient was found somewhat decreasing,along with temp reduction at the radiator's coolant inlet high temperature area.

关 键 词：国Ⅲ 排放标准 流场特性 散热模块 不均匀性 

分 类 号：TH243[机械工程—机械制造及自动化]