The approach taken was to analyze the results in a manner consistent with application by design engineers to new and existing applications, while providing some insight into the processes that are occurring. This paper deals with predicting the initiation of cavitation, cavitation impacts on the contraction coefficient , as well as noncavitation impacts on discharge coefficient from of five sharp-edge orifices over a turning angle range between 60 deg and 120 deg. The results show that in the cavitation regime, is controlled by the cavitation parameter , where the data follow the power with , and inception of cavitation occurs at a of 1.8. In the noncavitation regime for conditions where the cross velocity is 0 the data are consistent with the first order equation relating head loss to the dynamic pressure where is constant and is consistent with in-line orifices. Cross flow has a significant impact on loss coefficient and depends on both the turning angle and manifold inlet to orifice exit velocity ratio.
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December 2008
Research Papers
The Impact of Manifold-to-Orifice Turning Angle on Sharp-Edge Orifice Flow Characteristics in Both Cavitation and Noncavitation Turbulent Flow Regimes
T. Ohanian,
T. Ohanian
Science and Technology Applications LLC (STA)
, Moorpark, CA 93021
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D. G. Talley,
D. G. Talley
Air Force Research Laboratory Edwards Air Force Base
, AFRL/PRSA, 10 East Saturn Boulevard, Edwards AFB, CA 93524-7660
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P. A. Strakey
P. A. Strakey
Energy Systems Dynamics Division,
National Energy Technology Laboratory
, Morgantown, WV 26505
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W. H. Nurick
T. Ohanian
Science and Technology Applications LLC (STA)
, Moorpark, CA 93021
D. G. Talley
Air Force Research Laboratory Edwards Air Force Base
, AFRL/PRSA, 10 East Saturn Boulevard, Edwards AFB, CA 93524-7660
P. A. Strakey
Energy Systems Dynamics Division,
National Energy Technology Laboratory
, Morgantown, WV 26505J. Fluids Eng. Dec 2008, 130(12): 121102 (10 pages)
Published Online: October 23, 2008
Article history
Received:
June 26, 2007
Revised:
July 25, 2008
Published:
October 23, 2008
Citation
Nurick, W. H., Ohanian, T., Talley, D. G., and Strakey, P. A. (October 23, 2008). "The Impact of Manifold-to-Orifice Turning Angle on Sharp-Edge Orifice Flow Characteristics in Both Cavitation and Noncavitation Turbulent Flow Regimes." ASME. J. Fluids Eng. December 2008; 130(12): 121102. https://doi.org/10.1115/1.2978999
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