Accession Number : AD0860313

Title :   On Some Properties of Reattaching Laminar and Transitional High Speed Flows.

Descriptive Note : Technical note,

Corporate Author : VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s) : Ginoux, Jean J.

Report Date : SEP 1969

Pagination or Media Count : 69

Abstract : This paper is a review of some of the work done at the von Karman Institute over the past years on separated flows. Emphasis is given on a fundamental phenomenon developing in reattaching high speed flows, namely, spatially periodic patterns of counter-rotating streamwise vortices. Detailed surveys made with pitot-static tubes, hot wire probes, recovery temperature and heat transfer gages are presented. The effect of streamwise vortices on transition was studied using axisymmetric models on which the strength of vortices could be artificially controlled. For this purpose, a new criterion for transition detection was used. The effect of air and foreign gas injection in separated flow was studied and its application to suppressing local heat transfer peaks examined. (Author)

Descriptors :   (*FLOW SEPARATION, BOUNDARY LAYER), (*BUBBLES, SUPERSONIC FLOW), VORTICES, INJECTION, HEAT TRANSFER, SHOCK WAVES, LAMINAR BOUNDARY LAYER, TURBULENT BOUNDARY LAYER, BOUNDARY LAYER TRANSITION, INTERACTIONS, AIRCRAFT PROTUBERANCES, HYPERSONIC FLOW, PRESSURE, MODEL TESTS, MATHEMATICAL MODELS, FLOW VISUALIZATION, WIND TUNNEL MODELS, FLOW FIELDS, CYLINDRICAL BODIES, FLAT PLATE MODELS, BELGIUM.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE