Accession Number:
AD0669004
Title:
JETS AND WAKES IN TAILORED PRESSURE GRADIENT,
Descriptive Note:
Corporate Author:
BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH FLIGHT SCIENCES LAB
Personal Author(s):
Report Date:
1968-02-01
Pagination or Media Count:
40.0
Abstract:
Similarity solutions of the boundary layer equations representing the flow of jets in an external stream and tailored pressure gradients were obtained. These solutions apply to jets in co-flowing and counter-flowing streams. A number of analytical solutions not previously published were obtained. Of particular interest are the solutions for small increment jets which imply that a Gaussian velocity profile exists far downstream from the origin of the jet, even in arbitrary pressure gradient. The solutions were extended to turbulent flow using the hypothesis of a constant eddy viscosity, which, in turn, was modified to account for intermittency. The theoretical predictions were compared with the measurements of Gartshore in self-preserving wakes and the agreement between theory and experiment is good. Author
Descriptors:
Subject Categories:
- Aerodynamics
- Fluid Mechanics