Synthetical performance analysis of different inlet ducts used for waterjet
In order to master the synthetical performance of waterjet inlet duct,the differences in geometry,hydraulic performance and sound propagation characteristic of three inlet ducts used for the same waterjet pump are analyzed,besides that the influence of cross-section variety corresponding to different inlet ducts on sound transmission is also analyzed.The section area of two ducts firstly become smaller and then become bigger from the outlet of circular-arc segment to the inlet of incline segment,while the section area is the same for the third duct.There is no significant difference between three inlet ducts in hydraulic performance;In terms of sound propagation characteristics,the variable cross-section duct is superior to the constant cross-section duct throughout the entire analysis frequency range.At last,the circular section and incline section of the duct is taken as the object to analyze the influence of different parameters on sound propagation characteristics.The calculation results show that the incline angle of inlet duct has notable influence on the sound propagation characteristic.
NETL
NSTL
万方数据
