Accession Number : ADA190627

Title :   Experimental Determination of the Coefficients of the Hydraulic Resistance of Apertures in the Rotary Disks,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Shvets, I T ; Dyban, Ye P ; Selyavin, G F ; Stradomskiy, M V

PDF Url : ADA190627

Report Date : 22 Jan 1988

Pagination or Media Count : 27

Abstract : Conclusion/derivations. 1. Rotation of disk exerts a substantial influence on condition of course of air through apertures. In the large ratios of the velocity of the rotation of the mean flow rate in the opening/aperture (order u/c=2.5) the value of the coefficient of flow rate for the openings/apertures with the sharp entering edges decreases approximately 6 times. 2. With sufficient high u/c (more than 4) effect of form of entering edges it is possible not to consider. 3. Rounding of trailing edges virtually does not have effect on conditions of air flow through apertures in rotary disks. 4. Coefficient of flow rate of apertures of square form investigated in work is close to coefficient of expenditure of cylindrical channels (with identical hydraulic radii). 5. Relative depth of aperture in the range of relations 0,96l/d 6,04 virtually does not have effect on dependence of value of coefficient of flow rate from rotation. 6. On the basis of analysis of experimental data in work empirical dependence of coefficients of flow rate and hydraulic resistance on parameters K and K, are obtained. The ratios indicated are valid for the disk, which rotates in the housing with the value relative to the axial clearance between the disk and the housing of more than than 1.5.

Descriptors :   *GAS FLOW, AIR FLOW, APERTURES, CHANNELS, COEFFICIENTS, CYLINDRICAL BODIES, DISKS, EXPERIMENTAL DATA, FLOW RATE, HYDRAULICS, MEAN, OPENINGS, RADIUS(MEASURE), RATIOS, RESISTANCE, ROTATION, RUSSIAN LANGUAGE, TRANSLATIONS, USSR, VAPORS, GAS TURBINES, COOLING, DRAG, TURBINE COMPONENTS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE