航空学报 > 2023, Vol. 44 Issue (14): 628190-628190   doi: 10.7527/S1000-6893.2022.28190

航空发动机非定常流固热声耦合专栏

新研民用涡轴发动机起飞状态喘振试验

李概奇, 马东阳(), 李杜, 刘少戎, 杨艳美   

  1. 中国航发湖南动力机械研究所,株洲 412002
  • 收稿日期:2022-10-31 修回日期:2022-11-15 接受日期:2022-12-07 出版日期:2023-07-25 发布日期:2022-12-22
  • 通讯作者: 马东阳 E-mail:mdyaecc@qq.com
  • 基金资助:
    发动机型号研制项目

Surge test on newly developing civil turboshaft engine under take⁃off condition

Gaiqi LI, Dongyang MA(), Du LI, Shaorong LIU, Yanmei YANG   

  1. AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China
  • Received:2022-10-31 Revised:2022-11-15 Accepted:2022-12-07 Online:2023-07-25 Published:2022-12-22
  • Contact: Dongyang MA E-mail:mdyaecc@qq.com
  • Supported by:
    Project for Engine Model Development

摘要:

为了深入研究大功率、高风险状态下喘振对发动机安全工作的影响,以某新研民用涡轴发动机为平台,采用从外部向压气机出口快速引入高压空气的逼喘方法,完成了起飞状态整机喘振试验研究,综合分析了喘振过程非定常流、固、热、声耦合现象。试验结果表明,起飞状态喘振时,发动机出现多次明显的放炮、喷火、冒烟等现象,气流参数大幅波动;受燃气温度较高的影响,起飞状态喘振一旦发生可短时引发数次喘振;发动机控制系统采用合理的燃油控制规律和导叶角度偏离诊断策略,可有效缓解喘振时燃气超温现象,帮助压气机导叶角度快速恢复和发动机退出喘振;喘振时发动机转子基频幅值没有明显变化,机匣径向振动总量未超过限制值。试验验证了发动机具备承受起飞状态喘振的工作能力。

关键词: 喘振试验, 非定常流动, 涡轴发动机, 起飞状态, 控制规律

Abstract:

To further investigate the surge influence on the safe operation of engines under the large power and high risk conditions, we perform the engine surge test under the take-off condition by rapidly inducing external high pressure air at the compressor outlet on a newly developing civil turboshaft engine platform, and comprehensively analyze the unsteady phenomena of fluid-solid-heat-acoustic coupling. The test results show that several obvious blasting, flaming, and smoking phenomena occur with significant fluctuations of engine flow parameters during surge under the take-off condition. Multiple surges may be rapidly excited once surge occurs during take-off due to the high gas temperature. By using the appropriate fuel control law and stator vane deviation diagnosis strategy, the engine control system is able to effectively alleviate the gas over-temperature phenomenon during the surge, and facilitate rapid recovery of the compressor stator vane angel and quit of the engine from surge. The base-frequency amplitude of the engine rotor has no obvious change during the surge, and the radial total vibration values in the engine case do not exceed the limit value. The engine capability of withstanding surge under the take-off condition has been verified.

Key words: surge test, unsteady flow, turboshaft engine, take-off condition, control law

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