EXPERIMENTAL INVESTIGATION ON SOUND SPEED PROPAGATING THROUGH HIGH SPEED AERATED FLOW IN OPEN CHANNEL  

作　　者：Liao, Hua-Sheng  Xu, Wei-Lin  Yang, Yong-Quan  Wu, Chi-Gong 

机构地区：[1] Hydraulics of High Speed Flows, Sichuan Univ., Chengdu 610065, China

出　　处：《Journal of Hydrodynamics》2002年第3期97-101,共5页水动力学研究与进展B辑（英文版）

基　　金：Trans CenturyTrainingProgrammeFoundationfortheTalentsbytheStateEducationCommis sion

摘　　要：An experiment concerning the sound propagation in aerated open channel flow was designed and conducted in a variable slope chute. The acquisition of sound data was done by the hydro-phones installed into the bottom wall of the chute. The data were analyzed and processed by the tape recorder and a 3562A analyzer. The primary experimental results indicate that the sound speed in aerated flow is varied with the air concentration and highly lower than each of the sound speed in pure water or air. As released by the derived theoretical formula, the minimum sound of 24 m/s in aerated flow happened when the air concentration achieved to 50%. This result shows that the compressibility of high speed aerated flow should be considered when the air concentration is near to 50%. A criterion of compressibility of high speed aerated flow was also given in this paper.An experiment concerning the sound propagation in aerated open channel flow was designed and conducted in a variable slope chute. The acquisition of sound data was done by the hydro-phones installed into the bottom wall of the chute. The data were analyzed and processed by the tape recorder and a 3562A analyzer. The primary experimental results indicate that the sound speed in aerated flow is varied with the air concentration and highly lower than each of the sound speed in pure water or air. As released by the derived theoretical formula, the minimum sound of 24 m/s in aerated flow happened when the air concentration achieved to 50%. This result shows that the compressibility of high speed aerated flow should be considered when the air concentration is near to 50%. A criterion of compressibility of high speed aerated flow was also given in this paper.

关 键 词：AIR COMPRESSIBILITY Open channel flow Tape recorders Two phase flow WATER 

分 类 号：O427[理学—声学]