Study of the propagation of a plane turbulent jet in flow-through chamber workings

Journal Article · Sun May 01 00:00:00 EDT 1988 · Sov. Min. Sci. (Engl. Transl.); (United States)

OSTI ID:6087220

Laigna, K Yu; Potter, E A

The purpose of this study was to determine experimentally the parameters of microstructures of confined planar jets and to investigate the specific features of turbulent diffusion of impurities in such flows for problems of mine ventilation and pollution abatement in underground workings. A confined planar jet flowing from a slot coaxially into the model of a chamber working of rectangular transverse cross section was studied. The averaged and pulsating characteristics of the jet were measured by a thermoanemometer. Transient and channel zones were identified and the movement of the jet within them was described. Results demonstrated that the turbulent diffusion coefficient in the jet-affected zone was greater by two or three orders of magnitude than in the remainder of the flow and that it is therefore incorrect to use turbulent diffusion coefficients of confined flows for evaluations of the jet diffusion of impurities.

• Research Organization: Civil Engineering Research Institute of the State Construction Agency of the Estonian SSR, Tallin (USSR)
• OSTI ID: 6087220
• Journal Information: Sov. Min. Sci. (Engl. Transl.); (United States), Vol. 23:4; Other Information: Translated from Fiz.-Tekh. Probl. Razrab. Polezn. Iskop.; 23: No. 4, 89-95(Jul-Aug 1987)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
JETS
FLOW MODELS
UNDERGROUND MINING
VENTILATION
AIR FLOW
AIR POLLUTION ABATEMENT
CONVECTION
DIFFUSION
FLOW RATE
MINE ROADWAYS
PRESSURE EFFECTS
REYNOLDS NUMBER
TURBULENT FLOW
VENTILATION SYSTEMS
VORTEX FLOW
WORKING FACES
ENERGY TRANSFER
FLUID FLOW
GAS FLOW
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
MINING
POLLUTION ABATEMENT
TUNNELS
UNDERGROUND FACILITIES
012033* - Coal
Lignite
& Peat- Underground Mining- Mine Environment- (1987-)