Accession Number:

ADA058749

Title:

Technical Evaluation Report of the Fluid Dynamics Panel Symposium on Laminar-Turbulent Transition.

Descriptive Note:

Advisory rept.,

Corporate Author:

ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)

Personal Author(s):

Report Date:

1978-06-01

Pagination or Media Count:

20.0

Abstract:

The Symposium permitted a review of progress attained during the last ten years in transitional flow research. The transitional phenomenon remains as one of the least understood fluid mechanical processes. Difficulties encountered are due to the multiplicity of poorly identified parameters which influence transition, including ill-founded, pseudotheoretical concepts and coarse experimental techniques and procedures. The papers presented are critiqued herein stressing those contributions which enhance our understanding as well as those which fall short of expectation. Improvements have been realized in linear and non-linear stability theory and through increased proliferation of powerful numerical calculation methods. Experimentally, progress has been noted in analysis and interpretation of results, including signal processing methods. Considerable effort needs to be expended in detailed and carefully controlled experiments in low disturbance level, low velocity facilities equipped with high quality measuring instrumentation. Global investigations at high velocity in numerous facilities are needed, providing such quantities as flow quality turbulence, noise, temperature disturbances are well documented. Parallel theoretical investigations must be conducted in conjunction with the experimental effort. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE