摘要
随着生活品质的提高,人们对汽车性能的要求也越来越高,驾驶舱内热舒适性与汽车安全性、经济性等各方面性能都有密切关系,而空调送风参数是直接影响驾驶舱内热环境和空调能耗的重要因素。本研究以某种带有座椅通风功能空调系统的货车驾驶舱模型为例,针对夏季炎热环境,考虑太阳辐射和驾驶舱各部位的热传导、热对流和热辐射,利用算流体力学(CFD)的方法对空调出风口不同出风口送风温度和送风速度情况下的驾驶舱内流场进行了研究,采用热舒适性偏差和空调制冷量Q为评价指标,分别对热舒适性和经济性进行评价,探究汽车空调不同工作状态时这两种性能的变化规律。数值模拟结果表明,人体热舒适性和空调经济性随送风温度和送风速度的改变呈规律性变化,汽车空调送风的高温、高速工况和低温、低速工况可使人体达到相同舒适性水平,但在获得相同水平热舒适性时,高温、高速工况较之低温、低速工况具有更好的经济性。
With the improvement of the quality of life,people′s requirements for the performances of car are getting higher and higher.The thermal comfort in the cockpit is closely related to the safety and economy of the car.The air conditioning parameters are important factors that directly affect the thermal environment in the cockpit and the energy consumption of the air conditioner.A model of a truck cockpit with a seat ventilation air conditioning system was established to numerically simulate the flow field in the truck cockpit in the case of different speeds and temperatures of the airflow at the air conditioner outlet.For summer environments,solar radiation,heat transfer,heat convection and heat radiation must be considered in the simulation.The computational fluid dynamics(CFD)research method was used in this study.The thermal comfort deviation and air conditioning refrigeration Q were used as evaluation indexes to evaluate the thermal comfort of the human body and air conditioning energy efficiency,and further explore the changes of these two performances when the vehicle air conditioners work in different working states.The numerical simulation results show that the thermal comfort of the human body and air conditioning economy change regularly with the change of supply air temperature and air supply speed.Under low temperature and low speed or high temperature and high speed air supply conditions,the thermal comfort of human body is at the same superior level.But the energy efficiency of air conditioning under high temperature and high speed conditions is better than the low temperature and low speed conditions.
作者
苏楚奇
江玥
汪怡平
袁晓红
SU Chu-qi;JIANG Yue;WANG Yi-ping;YUAN Xiao-hong(School of Automotive Engineering,Wuhan University of Technology,Hubei Wuhan 430070,China)
出处
《机械设计与制造》
北大核心
2022年第1期228-232,236,共6页
Machinery Design & Manufacture
基金
国家重点研究开发项目(2018YFB0105301)
国家自然科学基金(51775395)。
关键词
驾驶舱
热舒适性
经济性
送风参数
数值模拟
Cockpit
Thermal Comfort
Energy Efficiency
Air Supply Parameters
Numerical Simulation
