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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (11): 2464-2471.doi: 10.7527/S1000-6893.2013.0130

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Experimental Investigation of Control with Tip Air Injection in Axial Flow Compressor

LI Jichao1,2, LIN Feng1,2, TONG Zhiting1,2, NIE Chaoqun1,2   

  1. 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Key Laboratory of Advanced Energy and Power, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2013-01-04 Revised:2013-02-26 Online:2013-11-25 Published:2013-03-06
  • Supported by:

    National Natural Science Foundation of China (51010007, 51176188, 51006099)

Abstract:

Tip air injection is proven to be able to enhance effectively the stall margin in axial flow compressors. It is here selected as a control method, and a proportional electromagnetic valve is adopted to realize the real-time adjustment of injected mass flow, which can take full advantage of the stability enhancement ability from micro injection to macro injection. A corresponding DSP (Digital Signal Processing) controller is designed to realize signal acquisition, algorithm analysis and output of the control signal. In the DSP controller, a cross-correlation analysis is performed to detect the pre-stall inception signal. Experiments are performed in a single-rotor axial flow compressor. The experimental results demonstrate that the control with tip air injection based on the proportional electromagnetic valve and DSP controller not only achieves the same stability enhancement as the steady tip air injection, but also saves a considerable quantity of injected energy. This method has a good application prospect.

Key words: compressor, tip air injection, proportional electromagnetic valve, DSP controller, cross-correlation analysis

CLC Number: