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一、研究与分析方法 本实验在地面台架上的一台涡喷发动机上进行。图1为试验装置前段及挡板装置简图。挡板用以产生较强的湍流型动态压力畸变,而压气机出口测点的动态压力P_2~*与进口环面相应半径上测点的动态压力P_1~*则构成相关分析的输出与输入信号。动态压力测量采用Kulite微型固态压阻式传感器,并经放大系统,由磁带机记录下在湍流型动态压力畸变工况时发动机进入漂移型喘振的压力信号过程,试验后通过磁带机回放压力脉动数据,并在信号分析仪上处理。为了得到准确的喘前压力脉动数据,直接以喘振发生时的P_2~*剧
First, the research and analysis methods The experiment on the ground on a turbine turbojet engine. Figure 1 is a schematic front section of the test device and baffle device. The baffle is used to generate strong turbulent dynamic pressure distortion. The dynamic pressure P_2 ~ * at the measuring point of the compressor outlet and the dynamic pressure P_1 ~ * at the measuring point corresponding to the inlet torus constitute the output and input signals . Dynamic pressure measurement using Kulite miniature solid-state piezoresistive sensors and amplified by the system, recorded by the tape drive in turbulent dynamic pressure distortion conditions into the drift surge pressure signal process, after the test by the tape playback pressure pulsation Data, and processed on the signal analyzer. In order to get accurate data of pre-diastolic pressure pulsation, P 2 ~ *