Technical Briefs

Study of Unguided Flow in a Chamber

[+] Author and Article Information
A. Abdel-Fattah

Department of Mechanical Power Engineering, Faculty of Engineering, Minoufiya University, Gamal Abdul-Nasser St.-Shebin El-Kom, Egyptashourabdelfatah@yahoo.com

J. Fluids Eng 132(7), 074501 (Jun 29, 2010) (7 pages) doi:10.1115/1.4001394 History: Received July 29, 2008; Revised November 30, 2009; Published June 29, 2010; Online June 29, 2010

In the present, a steady laminar of two dimensional and incompressible fluid flow induces from wall injection in a circular chamber has been studied experimentally and numerically. The water is injected from injection system into the chamber through the wall jets. The centerline static pressure variation with the distance along the chamber length is measured and calculated at different Reynolds numbers and inlet flow angles. The average heat transfer with Reynolds number at different values of the inlet flow angle is obtained. The velocity vectors are presented and Reynolds number is varied between 433 and 910 with inlet flow angle of 0 deg, 15 deg, 30 deg, 45 deg, and 60 deg. The results indicate that the pressure recovery coefficient decreases as both Reynolds number and flow angle increase. The average heat transfer coefficient increases with increasing both Reynolds number and flow angle. The results showed that two recirculation zones occur in the sides of centerline of the chamber behind the step. The size of these recirculation zones decreases by increasing the inlet flow angle. At high value of the inlet flow angle, other recirculation zone occurs on the wall chamber.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 8

Variation in average Nusselt number with Reynolds number for inlet flow angle (a) θ=0 deg, 15 deg, and 30 deg and (b) θ=45 deg and 60 deg

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Figure 9

Variation in average Nusselt number with inlet flow angle

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Figure 1

(a) Schematic diagram of experimental apparatus, (b) flow guide for injection system, and (c) the injection system

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Figure 2

(a) Computational domain and (b) effect of grid refinement on the pressure recovery coefficient

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Figure 3

Mean velocity vector field for different values of Reynolds number: (a) Re=250 and (b) Re=750 at inlet flow angle at 0 deg

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Figure 4

Mean velocity vector field for different values of inlet flow angle at Re=453

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Figure 5

Variation in the static pressure along the chamber wall at different Reynolds number (a) 0 deg, (b) 15 deg, (c) 30 deg, (d) 45 deg, and (e) 60 deg

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Figure 6

Variation in the maximum pressure recovery coefficient with inlet flow angle for different values of Re

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Figure 7

Variation in the pressure recovery coefficient along the chamber wall at different values of flow angle and Re=453



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