内燃机工程2018，Vol.39Issue(1)：68-72,80,6.DOI:10.13949/j.cnki.nrjgc.2018.01.011
发动机电控节气门瞬态流动过程三维数值模拟与研究
3-Dimensional Simulation about Transient Flow Process of Engine Electronic Control Throttle
摘要
Abstract
Bases on the basic structure and operating function of engine throttle,according to the actual structure of a throttle,a 3-dimensional simulation of air transient flow in the course of throttle being rotated from closed position to the full opening position was realized by using CFD together with the moving mesh technology and user defining program.The influence of the throttle movement on air flow process was studied.The velocity field,pressure field and flow noise field were analyzed at different rotational angles of the throttle.The numerical simulation results show that at the beginning period of throttle rotation,eddy appears in the flow field behind the throttle and air pressure drop between the front and back of throttle is sharp,the flow noise field appears near the top and bottom position of throttle and the maximum value of acoustic power appears when the throttle opening is near 40 degrees.With the increase of the throttle rotational angle,the eddy weakens gradually,the air pressure drop between the two sides of throttle becomes small,the flow noise firstly increases and then decreases,the maximum value of acoustic power appears behind the throttle all the time and its position is gradually away from the throttle axes.The velocity field,pressure field and flow noise become steady gradually when throttle opens completely.关键词
内燃机/节气门/瞬态流动/数值模拟Key words
IC engine/throttle/transient flow/numerical simulation分类
能源科技引用本文复制引用
杨帅,唐振华,薛良君,常国峰,余海燕..发动机电控节气门瞬态流动过程三维数值模拟与研究[J].内燃机工程,2018,39(1):68-72,80,6.基金项目
上海市技术性贸易措施应对专项项目 （）
中央高校基本科研业务费专项资金项目 （）
同济大学课程建设实验教改项目 （）
同济大学教学改革资助项目 （）
同济大学精品实验资助项目Special Projects for Replying Technical Trade Measures in Shanghai （）
Special Funds for Basic Scientific Research Services in Central Universities （）
The Reform Project of the Experimental Teaching of the Curriculum Construction of Tongji University （）
The Project of Teaching Reform of Tongji University （）
Financed Project of Excellent Experiment of Tongji University （）
