PERFORMANCE OF A COMBINED THREE-HOLE CONDUCTIVITY PROBE FOR MEASURING VELOCITY IN AIR-WATER JETS
A three-hole pressure probe with back-flushing, combined with an electrical conductivity probe, was developed to perform the simultaneous measurement of the magnitude and direction of the velocity vector in complex air-water flows, where the flow direction is not known prior to data acquisition. Such situation typically occurs inside and around the rotor of Cross-Flow turbines. A calibration rig was also built aiming at the calibration of the combined probe (both conductivity and three-hole pressure components), placed in a position similar to that adopted for flow measurements in a Cross-Flow turbine rotor. After concluding the combined probe calibration procedure, the probe was tested in the outside region of the turbine rotor. This paper addresses the probe development and calibration, with particular emphasis on the velocity measurements. The experimental results are encouraging towards the use of the combined probe in complex air-water flows, namely in Cross-Flow turbines.
Air-water flow combined three-hole conductivity probe velocity measurement Cross-Flow turbine
N.H.C.Pereira J.E.Borges J.Matos K.Frizell
Polytechnic Institute of Setúbal, ESTSetúbal, Department of Mechanical Engineering, Sethbal, Portuga Technical University of Lisbon, IST, Department of Mechanical Engineering, Lisbon, Portugal Technical University of Lisbon, IST, Department of Civil Engineering and Architecture, Lisbon, Portu U.S.Bureau of Reclamation, Denver, CO 80225, USA
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
1966-1971
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）