摘要
为了消除目前研究中普遍存在的涡轮非稳态效率不符合能量转换定律的非正常现象,提出一种解决非稳态参数时间滞后的方案,改进涡轮非稳态效率的计算方法。通过数值模拟的研究方法,对180°分隔式进气双流道涡轮进行了非稳态条件下的性能研究,结果表明,涡轮呈现典型的非稳态特性圈,并且涡轮非稳态效率在0～1的正常区间内变化。探讨了涡轮非稳态特性的部分规律并寻找其与脉冲波的关系,初步揭示了非稳态特性的机理所在。
To solve the abnormal phenomenon that the turbine unsteady efficiency didnot conform to the law of energy conver- sion, the scheme to solve time lag of unsteady parameters was put forward, which improved the calculation method of turbine unsteady efficiency. With the numerical simulation methord, the unsteady characteristics of double entry turbine with the 180° section for each entry were researched. The results indicated that the turbine showed the typical unsteady characteristic loop. And the turbine unsteady efficiency varied normally between 0 and 1. The turbine unsteady characteristics were further dis- cussed and the relationship between unsteady characteristics and pulse wave was searched. Finally, the mechanism of the tur- bine unsteady characteristics was preliminarily uncovered.
出处
《车用发动机》
北大核心
2013年第2期74-78,共5页
Vehicle Engine
关键词
涡轮增压器
分隔式
涡轮
非稳态
数值模拟
时间滞后
turbocharger
double entry
turbine
unsteady state
numerical simulation
time lag
