Unsteady Pressure Measurements in a High-Speed Centrifugal Compressor

作     者：N.Bulot X.Ottavy I.Trebinjac 

作者机构：Laboratoire de Mécanique des Fluides et d'Acoustique(LMFA)UMR CNRS 5509 Ecole Centrale de LyonUCBLyon IINSA 36 av.Guy de Collongue69134 Ecully cedexFrance 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2010年第19卷第1期

页      面：34-41页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

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

主　　题：unsteady pressure measurements conditioner high frequency high speed centrifugal compressor. 

摘      要：This paper presents the unsteady data acquisition system used to measure the pressure field in high speed *** 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 *** 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 *** levels of pressure fluctuations measured when entering into surge are also presented and reveal very repetitive behaviour of the flow instabilities.