脉动调节式可变喷嘴涡轮非定常特性试验  

Unsteady Experiment of Pulse-regulated Variable Nozzle Turbine

作　　者：施新[1] 彭文[1] 李斌[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《车用发动机》2013年第2期22-25,共4页Vehicle Engine

摘　　要：为了更有效地利用发动机排气脉冲波能量,以JK90S可变喷嘴涡轮为基础,开发了喷嘴叶片脉动调节和控制系统,使喷嘴叶片角度随涡轮进口脉冲波按照一定规律高频变化。在涡轮非稳态特性试验台上,进行了涡轮进口来流脉冲频率为20Hz条件下,喷嘴叶片角度固定不变和喷嘴叶片脉动调节两种情况下的涡轮非定常特性试验。试验结果表明,相对于常规可调涡轮,随涡轮进口脉冲来流采用适当幅值的喷嘴叶片脉动调节,涡轮瞬态输出功率有了一定程度提高。In order to utilize the exhaust pulse energy effectively, the pulse regulation and control system of nozzle vane was developed based on JK90S variable nozzle turbine, which could make the nozzle vane angle change in high frequency with tur- bine inlet pulse wave according to certain laws. Under the condition of 20 Hz pulse flow in turbine inlet, the unsteady experi- ments of fixed nozzle vane angle and pulse-regulated nozzle vane were carried out on a test bench. The results show that, com- pared with conventional variable turbine, the pulse-regulated VNT with a suitable control of nozzle vane can improve the turbine output power.

关 键 词：可变喷嘴涡轮 脉动调节 非定常试验 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]