Experimental Study of Surge and Rotating Stall Occurring in High-speed Multistage Axial Compressor
The analysis of signals of surges and rotating stalls occurring and processing is essential to reveal the characteristics of instability phenomena,to develop detecting methodology and active control technique,to assure the rig and compressor safety.A high-speed 7-stage compressor was tested on a rig,with 10 channels of casing static pressures and a channel of outlet total pressure.It illustrates by the case with the rotating speed 16,400RPM.Firstly,to detect the stall precursors,the spectrum analysis and the short-time-Fourier-transform(STFT)are employed.It shows the precursors are formed about 3.5s before the surge point in each stage individually.Then,the correlation functions are calculated to analysis the relationship between casing static pressures.Results show that the rotating stalls of the 1-3stages have phase differences,while the 4-7stages do not.Finally,the time-domain waveforms analysis instruct that the stagnation cell of surge is firstly formed between the 3rdand the 4thstator rows,and then moves downwards.The surge is companied with the rotating stalls.The front 3 stages are in the cycles of the stall-surge-recover-stall in the whole surge process.
Surge Stall Aerodynamic installbilty Signal processing Compressor
Changzheng LI Siqi XU Zhiqi HU
Northwestern Polytechnical University,POB631,West Youyi Road 127,Xian 710072,China
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-13
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）