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Final Report: Wall Effects in Cavity Flows

Wu, T. Yao-tsu and Whitney, Arthur K. and Lin, J. D. (1969) Final Report: Wall Effects in Cavity Flows. California Institute of Technology , Pasadena, CA. (Unpublished)

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The wall effects in cavity flows past an arbitrary two-dimensional body is investigated for both pure-drag and lifting cases based on an inviscid nonlinear flow theory. The over-all features of various theoretical flow models for inviscid cavity flows under the wall effects are discussed from the general momentum consideration in comparison with typical viscous, incompressible wake flows in a channel. In the case of pure drag cavity flows, three theoretical models in common use, namely, the open-wake, Riabouchinsky and re-entrant jet models, are applied to evaluate the solution. Methods of numerical computation are discussed for bodies of arbitrary shape, and are carried out in detail for wedges of all angles. The final numerical results are compared between the different flow models, and the differences pointed out. Further analysis of the results has led to development of several useful formulas for correcting the wall effect. In the lifting flow case, the wall effect on the pressure and hydrodynamic forces acting on arbitrary body is formulated for the choked cavity flow in a closed water tunnel of arbitrary shape, and computed for the flat plate with a finite cavity in a straight tunnel.

Item Type:Report or Paper (Technical Report)
Additional Information:This research was carried out under the Naval Ship Systems Command General Hydromechanics Research Program SR 009 01 01, and Hydrofoil Advanced Development Program S46-06, administered by the Naval Ship Research and Development Center. Prepared under Contract N00014-67-A-0094-0007. The research program under Contract N00014-67-A-0094-0007 was given to commence on 1 February 1966, and has been completed on 31 January 1969. This report concludes the work carried out under this Contract. The objective of the present report is to indicate the scope of work performed, to state the progress and contributions achieved, and to report the recent results obtained under this program.
Record Number:CaltechAUTHORS:E-111-A5
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:409
Deposited By: Archive Administrator
Deposited On:16 Jun 2005
Last Modified:02 Oct 2019 22:33

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