Computer Program for Calculation of Separated Turbulent Flows on Axisymmetric Afterbodies
Abstract
A computer code for a turbulent boundary-layer, inviscid interaction method for axisymmetric configurations of the type used for isolated nozzle afterbody models is presented. The method is applicable to flows subsonic free streams, including slightly supercritical flows. The method consists of an integral boundary-layer method and a finite-difference inviscid-flow method which are coupled iteratively through the boundary-layer displacement thickness. Both attached and separated boundary layers can be calculated. An option is provided for calculating two-dimensional boundary layers. The procedure for separated flows is to specify the displacement thickness of the boundary layer and calculate the free-stream velocity distribution from both the boundary-layer equations and the inviscid-flow equations. The separation point location and the angle of the displacement surface are found by an iterative procedure. The equations programmed are presented along with detailed instructions for the preparation of input data, description of the program output and instructions for operation of the program on an IBM 370 computer. Sample cases are provided for a complete axisymmetric interaction calculation and for a two-dimensional boundary-layer calculation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1977
- Accession Number
- ADA041219
Entities
People
- Gary D. Kuhn
Organizations
- Nielsen Engineering & Research (United States)