喷管偏转对航空发动机特性影响的试验

李建榕; 白伟

doi:10.13224/j.cnki.jasp.2016.05.024

喷管偏转对航空发动机特性影响的试验

doi: 10.13224/j.cnki.jasp.2016.05.024

李建榕^1,2,
白伟²

1. 北京航空航天大学能源与动力工程学院, 北京 100191;
2. 中国航空工业集团公司沈阳发动机设计研究所, 沈阳 110015

详细信息

作者简介:
李建榕(1965-),女,辽宁沈阳人,研究员,博士生,主要从事航空发动机总体设计及试验研究.

中图分类号: V231.3
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- 文章访问数: 904
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- 被引次数: 0
出版历程
- 收稿日期: 2016-03-09
- 刊出日期: 2016-05-28

Experiment on influences of nozzle deflection on aeroengine characteristic

LI Jian-rong^1,2,
BAI Wei²

1. School of Energy and Power Engineering, Beijng University of Aeronautics and Astronautics, Beijing 100191, China;
2. Shenyang Engine Design and Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

摘要

摘要: 通过整机地面试验的方法,对喷管偏转后发动机不同工作状态下各参数的分析,获得了矢量偏转时发动机推力损失、偏转效率、发动机工作特性变化等数据.试验结果表明:在相同高压转速下,随着几何矢量角的增大,发动机的推力损失增大,偏转效率先增大后减小;在相同几何矢量角下,随着转速的增加,发动机推力损失经历由增大到减小的过程,矢量喷管的偏转效率增大,但偏转效率均小于1;节流状态时发动机转速差随着几何矢量角的增大而增大,中间状态时发动机转速差不受几何矢量角的影响;发动机节流状态时的矢量偏转使风扇工作线上移,风扇裕度减小,工程应用中需考虑扩稳措施.
- 工作特性 /
- 矢量喷管 /
- 航空发动机 /
- 地面试验 /
- 推力损失 /
- 偏转效率 /
- 转速差
Abstract: Based on the engine overall performance ground test and parameter analysis in case of nozzle deflection under different working conditions, the effect of nozzle deflection on engine thrust loss, deflection efficiency and engine working characteristics were obtained. The experimental results showed that the engine thrust loss increased and deflection efficiency increased at first and then decreased with the increase of geometric vector angle when compressor speed remained unchanged. The engine thrust loss increased at first and then decreased, and the deflection efficiency increased with the increase of rotor speed when geometric vector angle remained unchanged, but the deflection efficiency was always less than 1. Engine speed difference increased with the increase of geometric vector angle when engine worked in throttle rating and speed difference almost kept constant with the increase of geometric vector angle when engine worked in middle rating. Fan co-operating line moved upward and fan surge margin decreased in case of nozzle deflection. So the method of expanding stability should be adopted for the engineering application of vectoring nozzles.
- working characteristics /
- axisymmetric vectoring nozzle /
- aeroengine /
- ground test /
- thrust loss /
- deflection efficiency /
- speed difference

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