Cavitation inception in quiescent and co-flow nozzle jets
The prediction and scaling of cavitation inception in jets remains a difficult task. This paper presents findings of an experimental investigation to study the cavitation inception of quiescent and co-flow submerged jets. Experimental data were collected in the ARL/PSU 12-inch and 48-inch Diameter Water Tunnels. A submerged nozzle was mounted axially along the centerline of the test section with jet mass flow supplied using an external pump . The setup allowed for independent control of both jet and freestream velocities. Observations of cavitation patterns, inception locations and cavitation inception numbers for quiescent (VR=V8/Vjet=0), near-quiescent (0<VR<0.1) and coflow (VR>0.1) operating conditions were recorded. Data were measured using two- 25.4mm and one- 101.6mm diameter axisymmetric nozzles. Visual observations of cavitation indicated that the cavitation occurs in different location for co-flow jets compared to quiescent jets. PIV measurements show that different flow mechanisms are responsible for this cavitation inception.
Cavitation inception co-flow nozzle jet cavitation
William A.Straka Richard S.Meyer Arnold A.Fontaine Joseph P.Welz
Applied Research Laboratory,The Pennsylvania State University State College,PA,USA
国际会议
9th International Conference on Hydrodynamics(第九届国际水动力学会议 ICHD2010)
上海
英文
810-816
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）