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

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 inf...

Full description

Saved in:
Bibliographic Details
Main Author: Morkovin,Mark V
Format: Report
Language:English
Subjects:
FLUID DYNAMICS
FLUID FLOW
Fluid Mechanics
LAMINAR FLOW
MEASUREMENT
NUMERICAL ANALYSIS
PARAMETERS
STABILITY
SYMPOSIA
Transition flow
TRANSITIONS
TURBULENT FLOW
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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) See also Rept. no. AGARD-CP-224 dated May 77, AD-A048 990.