摘要
在研究装载机驾驶室时,很少考虑到驾驶室正压的问题,利用计算流体动力学(CFD)建立驾驶室有限元模型,通过仿真计算,得出装载机驾驶室内速度场和温度场的分布。经实车试验,验证了CFD模型的合理性和可信性。基于此模型,提出一种运用FLUENT自定义场函数的方法,对预计平均热感指数-预计不满意率(PMV-PPD)热舒适性指标进行UDF编译,分析空调不同送风速度下驾驶室内热舒适性和正压对人体的影响。结果表明:设定送风温度为35℃,当送风速度在7.5~8.5 m·s;的区间内,驾驶室内正压能满足大于50 Pa、小于200 Pa的要求,并且驾驶员表面(PMV-PPD)值的分布基本合理,此条件下人体热感觉比较舒适,驾驶室整体内热环境良好。
In order to study the problem of loader cab that rarely considers positive pressure,computational fluid dynamics(CFD)is used to establish a finite element model of the cab,and through simulation calculations,the distribution of the speed field and temperature field in the cabin is obtained. The actual vehicle test verifies the rationality of the CFD model and credibility. Based on this model,a method of using FLUENT custom field function is proposed to compile the PMV-PPD thermal comfort index with UDF,and analyze the influence of the thermal comfort and positive pressure in the car interior on the human body at different air supply speeds of the air conditioner.The results show that the air supply temperature is set to 35 ℃,and when the air supply speed is within the range of 7. 5 to 8. 5 m·s;,the indoor positive pressure can meet the requirements of greater than 50 Pa and less than 200 Pa,and the distribution of the PMV-PPD value on the driver’s surface is basically reasonable,and the overall internal thermal environment of the driver’s cab is good,and the human body feels more comfortable under this condition.
作者
张喜清
王亚龙
孙世成
ZHANG Xiqing;WANG Yalong;SUN Shicheng(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,Shanxi,China)
出处
《中国工程机械学报》
北大核心
2021年第6期500-505,共6页
Chinese Journal of Construction Machinery
基金
山西省科技平台资助项目(201805D121006)
山西省研究生教育改革研究课题资助(2019JG169)。
作者简介
张喜清(1980-),男,副教授,博士。E-mail:873102049@qq.com。
