Experimental Investigation into Noise Characteristics of Water Jet in Anechoic Tank

doi:10.3969/j.issn.1000-1093.2018.06.017

Abstract

Abstract: An experimental system for producing water jet and measuring its radiated noise was designed and constructed to study the noise characteristics of water jet. Performances of free field in an anechoic tank are evaluated, and then the noise characteristics of water jet in the anechoic tank are measured using the proposed experimental system. Analysis of experimental data demonstrates that the source level and spectral distribution of water jet can be obtained exactly using the proposed experimental system with 50 mm diameter jet pipe at the jet efflux velocity of less than 20 m/s. Radiated power of water jet noise obtained from experiment varies approximately in proportion to the eighth power of jet efflux velocity, and water jet noise at efflux velocity of less than 20 m/s is mainly caused from its turbulent motion. Key

Key words: anechoictank, waterjetnoise, acousticalpower, effluxvelocity

CLC Number:

TB52⁺2

CHENG Guang-li， LUO Xia- yun， MENG Lu-wen， YANG Qiong-fang. Experimental Investigation into Noise Characteristics of Water Jet in Anechoic Tank[J]. Acta Armamentarii, 2018, 39(6): 1165-1170.

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第39卷第6期
2018 年6月兵工学报ACTA
ARMAMENTARIIVol.39No.6Jun. 2018