Unsteady Pressure Measurements in a High-Speed Centrifugal Compressor  

作　　者：N.Bulot X.Ottavy I.Trebinjac 

机构地区：[1]Laboratoire de Mécanique des Fluides et d'Acoustique(LMFA),UMR CNRS 5509 Ecole Centrale de Lyon,UCBLyon I,INSA 36 av.Guy de Collongue,69134 Ecully cedex,France

出　　处：《Journal of Thermal Science》2010年第1期34-41,共8页热科学学报（英文版）

基　　金：the company Turbomeca which supports the centrifugal compressor research program

摘　　要：This paper presents the unsteady data acquisition system used to measure the pressure field in high speed compressors.Details and electronic sketches are given for the conditioners developed in-house that have been used to amplify and to filter the pressure signal with the aim of acquiring data up to 150 kHz.A discussion of the experimental results carried out in a centrifugal compressor is proposed.Through different processing of the pressure signals and a comparison with URANS simulations,the excitation of the pressure transducers by the pressure waves generated by shock waves that occur between the impeller and the diffuser is highlighted.The levels of pressure fluctuations measured when entering into surge are also presented and reveal very repetitive behaviour of the flow instabilities.

关 键 词：unsteady pressure measurements CONDITIONER high frequency high speed centrifugal compressor. 

分 类 号：TH452[机械工程—机械制造及自动化]