Accession Number : AD0755423

Title :   Analytical Prediction of Wall Effect on Fully Cavitating Lifting Foils, Using Nonlinear Theory.

Descriptive Note : Research and development rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s) : Baker,Elwyn S.

Report Date : NOV 1972

Pagination or Media Count : 149

Abstract : A Fortran computer program, compatable with the CDC 6000 series, has been developed to evaluate the effect of a closed-jet tunnel-test section on the force coefficients of arbitrarily cambered, sharp-nosed, fully cavitating, two-dimensional hydrofoil sections. The numerical solution to this problem has been obtained using the nonlinear theory developed by T. Y. Wu in 1969. The theory employs an open-wake model, commonly called the Roshko or transition-wake model, to represent the cavity downstream of the foil section. Results of the program include predicted force coefficients, streamline shapes and pressure coefficient distributions. Some comparisons are made with the predictions of two other nonlinear theories available for the infinite-stream case only. (Author)

Descriptors :   (*HYDROFOILS, FLUID DYNAMICS), CAVITATION, WAKE, FLOW FIELDS, FLAT PLATE MODELS, MATHEMATICAL MODELS, FLOW SEPARATION

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE