柴油机稳流气道试验台的仿真与试验  

Numerical simulation and experiment on steady flow test bench of diesel intake port

作　　者：孙平[1] 夏开彦[1] 谢雪峰[1] 朱火延婧 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]扬州柴油机有限公司,扬州225009

出　　处：《农业工程学报》2007年第1期99-104,I0003,共7页Transactions of the Chinese Society of Agricultural Engineering

摘　　要：运用三维造型软件P ro/Eng ineer对柴油机稳流气道试验台进行造型,采用计算流体动力学(CFD)软件对气道-气门-气缸系统的流动特性进行模拟计算,目的是用数值稳流气道试验台的分析来代替气道开发前期在实际试验台上进行的反复修正工作。基于动量守恒原理,模拟计算出AVL和R icardo风速仪的转速,由此得到不同的涡流比并且进行了对比,结果显示:R icardo风速仪的涡流比比AVL风速仪的涡流比高。为验证数值稳流气道试验台模拟计算的准确,在采用R icardo风速仪的气道稳流试验台上进行了试验,两种方法下的流通系数和涡流比比较说明:模拟结果是可靠的。分析了气道-气门-气缸系统内部流场信息,提出了改进方向。A model of steady flow test bench was established by Pro-E, which was combined of intake port, valve and cylinder. The flow was numerically simulated by CFD software. The anticipated aim is to make the actual repeated amendment in steady flow test bench of intake port model taken place by the numerical one. Based on the principle of momentum conservation, the rotation speeds of two anemoscopes （AVL ＆ Ricardo anemoscopes） were computed. The swirl ratios calculated from the computed rotation speeds show that Ricardo swirl ratio is higher than AVL swirl ratio. To validate the accuracy of the simulation results of numerical steady flow test bench, experiments in a steady flow test bench with the Ricardo anemoscope were taken. The compared results between computations and experiments suggest that the former is reliable. The flow fields in the system provide academic basis for its improvement.

关 键 词：柴油机 CFD 稳流气道试验台 螺旋进气道 涡流比 

分 类 号：TK422.3[动力工程及工程热物理—动力机械及工程]