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

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....

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Bibliographic Details
Main Authors: Leontev,A. I, Mironov,B. P, Lugovskoy,P. P
Format: Report
Language:English
Subjects:
BLOWING
CHEMICAL INDICATORS
COLORIMETRIC ANALYSIS
FLOW VISUALIZATION
Fluid Mechanics
INJECTION
NEUTRALIZATION
PLATES(MECHANICAL)
POROUS MATERIALS
TRANSLATIONS
TURBULENT BOUNDARY LAYER
USSR
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Summary: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) Unedited rough draft trans. of Inzhenerno-Fizicheskii Zhurnal (USSR) v10 n4 p447-51 1966, by E. Harter.