新研民用涡轴发动机起飞状态喘振试验

doi:10.7527/S1000-6893.2022.28190

Abstract

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:

V231.3

Gaiqi LI, Dongyang MA, Du LI, Shaorong LIU, Yanmei YANG. Surge test on newly developing civil turboshaft engine under take⁃off condition[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(14): 628190-628190.

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设备	作用	功能及指标
储气装置	储存高压空气	供气压力约13 MPa
压力传感器	测量空气压力	测量范围0~20 MPa，测量精度为±0.5%FS
流量调节电动阀	调节空气流量	公称直径25 mm，远程控制
启停电磁阀	开启或切断空气	远程控制，响应速度20 ms
供气管路	输送空气至发动机2个引气口	适配发动机引气接口

参数符号	测量位置	测量方法	精度
P_s1	压气机进口	壁面静压	±0.5%FS
P_s3	压气机出口	壁面静压	±0.5%FS
P_t3	压气机出口	总压探针	±0.5%FS
T_t3	压气机出口	总温探针	±3.0 ℃
w_f	燃油泵进口前	流量计	±0.5%FS
T_t4.5	燃气涡轮出口	①	±5.0 ℃
n_g		①	±0.2%FS
n_p		①	±0.2%FS
J_y 、J_z	进气机匣安装边	振动传感器（y为径向水平， z为径向垂直）	±5.0%FS
F_y_、F_z	附件机匣安装边		±5.0%FS
T_y	涡轮机匣安装边		±5.0%FS

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

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