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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (14): 628190-628190.doi: 10.7527/S1000-6893.2022.28190

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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

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

CLC Number: