Accession Number:

ADA136980

Title:

Predicting the Onset of Turbulence in the Presence of a Pressure Gradient.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1983-12-01

Pagination or Media Count:

74.0

Abstract:

An analytical study is presented regarding the determination of a pressure gradient dependent criterion for flow transition from laminar to turbulent flow. The results obtained were derived from two parallel approaches to flow stability one of wave-dependent stability and the other of vorticity-dependent stability. In both cases, one of a variable transition Reynolds number dependent upon the ambient pressure gradient and the other one of a constant transition Reynolds number bases on the boundary-layer displacement thickness, the prediction results were either as good or better than those from available prediction methods. In addition these two criteria were used to predict transition locations on a NACA 0018 airfoil, again with favorable results. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE