Numerical and Experimental Studies of 3-D and Unsteady turbulent Body/Appendage/Propeller Flows.
Abstract
The 3-D, turbulent flowfield produced by a propeller operating in the wake of a variable mesh disk has been studied with numerical solutions of the Reynolds-averaged, Navier-Stokes equations and by detailed experiments in a wind tunnel. The mesh variations of the upstream disk were chosen to produce a simulation of the wake of a streamlined, axisymmetric body with a single, streamlined appendage. Comparisons of measurements and preliminary numerical predictions show good agreement for the velocity profiles behind the propeller. The 3-D flow in the junction between a cylindrical appendage and a hull can produce separation of the trailing portion of the appendage and produces a momentum deficient 3-D boundary layer that is more prone to detachment than the 2-D regions away from the appendage. Detailed measurements of the zero-pressure-gradient boundary layer upstream of an appendage of interest have been made. A procedure has been developed for reducing blockage effects in the test wind tunnel. Keywords: Propeller flowfields; Appendage flows; Numerical solutions of turbulent flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1985
- Accession Number
- ADA157078
Entities
People
- J. A. Schetz
- R. L. Simpson
Organizations
- Virginia Tech