文档介绍：
叶片稠度对叶栅式反推装置性能和流场的
影响#
周莉,王占学,刘增文*
5
10
(西北工业大学动力与能源学院,西安 710072)
摘要:本文对叶栅式反推装置的流场进行了数值模拟,研究了导流叶片稠度对反推装置流场
和性能的影响规律,结果表明在同一风扇压比下,叶栅稠度越小,反推效率越大,并且随着
风扇压比的增加,反推效率的增长幅度也越大。叶栅稠度不同,反推叶栅出口气流与自由流
形成的分离涡的大小和影响区域也不同。在同一风扇压比下,叶栅稠度越大,形成的涡流反
而越小,绕短舱外流的影响也越小。随着风扇压比的增大,涡流影响区域增大,并随着风扇
压比的增大涡流中心位置向前移动。叶栅稠度的大小对阻流门壁面压力分布影响不大。
关键词:流体机械及工程;叶栅反推;叶片稠度;反推效率
中图分类号:
15
Influence of Cascade Solidity on Flowfield and Aerodynamic
Performance of Cascade Thrust Reverser
ZHOU Li, WANG Zhanxue, LIU Zengwen
(School of power and energy, Northweatern Polytechnical University, Xi’an 710072)
20
25
30
35
40
Abstract: The flowfield of the cascade thrust reverser were investigated numerically under
different pressure ratio of the fan flow, the influence of the cascade solidity on the flowfield and
aerodynamic performance of cascade thrust reverser were discussed in detail. Results show that
the efficiency of the cascade thrust reverser increases with the reduction of the cascade solidity
under the same fan pressure ratio. The efficiency growth es greater under the larger fan
pressure ratio. The size and impact zone of the separation vortex induced by the outflow of the
thrust cascade and the free-stream flow differs with the change of the cascade solidity. Under the
same fan pressure, the vortex size reduces with the increment of the cascade solidity, and the
influence on th