Accession Number : AD0670912

Title :   EXPERIMENTAL DETERMINATION OF CRITICAL BLOW-IN PARAMETER ON A POROUS PLATE (EKSPERIMENTALNOE OPREDELENIE KRITICHESKOGO PARAMETRA VDUVA NA PORISTOI PLASTINE),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Leontev,A. I. ; Mironov,B. P. ; Lugovskoy,P. P.

Report Date : 28 JUN 1967

Pagination or Media Count : 14

Abstract : Experimental data on the determination of the critical blowing parameter on a porous plate are given. The method is based on the chemical reaction of the main stream with the fluid injected. The main stream is an acid solution and the injected fluid is an alkali solution colored by phenolphthalein. With injection flow rates below critical, a neutralization reaction takes place which results in decoloration of phenolphthalein. At critical injection flow rates, the main stream is displaced, and a clearly distinguishable film of the injected liquid appears on the plate surface. The experimental values of the critical injection parameter are in good agreement with the predicted ones obtained by the asymptotic theory of the turbulent boundary layer. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, INJECTION), (*POROUS MATERIALS, INJECTION), FLOW VISUALIZATION, NEUTRALIZATION, COLORIMETRIC ANALYSIS, CHEMICAL INDICATORS, USSR

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE