Local heat transfer from a flat plate to a swirling circular air impinging jet is investigated numerically. Reynolds Averaged Navier-Stokes equations (RANS) and energy equation are solved for the axisymmetric, three dimensional flow. Eddy-viscosity based turbulence models, RNG and V2F, are used. Non-uniform meshes are used for the three dimensional flows and mesh independent solutions are obtained. The flow Reynolds number, which is based on the jet diameter, is kept at 23,000. In the analysis, local heat transfer coefficients are obtained for different swirl numbers, S = 0.21, 0.35 and 0.47 and jet-to-plate distance, L/D, ranging from 2 to 9. Investigation of the effect of swirl flow profile at the exiting plane of the jet on heat transfer is also presented. It is found that different swirl profiles with the same swirl number lead to very different heat transfer behaviors in the stagnation region of the impinging jet.

1.
Behnia
M.
,
Parneix
S.
, and
Durbin
P. A.
,
1998
, “
Prediction of Heat Transfer in an Axisymmetric Turbulent Jet Impinging on a Flat Plate
,”
International Journal Heat and Mass Transfer
, Vol.
41
, pp.
1845
1855
.
2.
Bergles
A. E.
,
1997
, “
Heat Transfer Enhancement-The Encouragement and Accommodation of High Heat Fluxes
,”
Journal of Heat Transfer
, Vol.
119
, pp.
8
19
.
3.
Bilen
K.
,
Bakirici
K.
,
Yapici
S.
, and
Yavuz
T.
,
2002
, “
Heat Transfer from a Plate Impinging Swirl Jet
,”
International Journal of Energy Research
, Vol
26
, pp.
305
320
.
4.
Craft
T. J.
,
Graham
L. J. W.
, and
Launder
B. E.
,
1993
, “
Impinging Jet Studies for Turbulence Model Assessment-II. An Examination of the Performance of Four Turbulence Models
,”
International Journal of Heat and Mass Transfer
, Vol.
36
, pp.
2685
2697
.
5.
Durbin
P. A.
,
1991
, “
Near-Wall Turbulene Closure without Damping Functions
,”
Theoretical and Computational Fluid Dynamics
, Vol
3
, No.
1
, pp.
1
13
.
6.
Gardon
R.
, and
Akfirat
J. C.
,
1965
. “
The Role of Turbulence in Determining the Heat-Transfer Characteristics of Impinging Jets
,”
International Journal of Heat Mass Transfer
, Vol.
8
, pp.
1261
1272
.
7.
Gupta, A. K., Lilley, D. G., and Syred, N., 1984, “Swirl Flows”, Abacus Press, Cambridge, Mass
8.
Huang
L.
, and
El-Genk
MS.
1979
, “
Heat transfer and Flow Visualization Experiments of Swriling. Multi-channel, and Conventional Impinging Jets
,”
International Journal of Heat and Mass Transfer
, Vol.
41
, No.
3
, pp.
583
600
.
9.
Owsenek
B. L.
,
Cziesla
T.
,
Mitra
N. K.
, and
Biswas
G.
,
1997
, “
Numerical Investigation of Heat Transfer in Impinging Axial and Radial Jets with Superimposed Swirl
,”
International Journal of Heat and Mass Transfer
, Vol.
40
, pp.
141
1477
.
10.
Sunden, B., and Larocque, J., 2005, “Simulation of Heat Transfer from Swirling Impinging Jets,” ASME Turbo Expo.
11.
Ward, J., and Mahmood, M. 1990.” Heat Transfer from a Turbulent, Swirling, Impinging Jet,”, Proceeding of 9th International Heat Transfer Conference, pp. 401–407.
12.
Yakhot
V.
, and
Orzag
S. A.
,
1986
, “
Renormalization Group Analysis of Turbulence. I. Basics Theory
,”
Journal of Sci. Comp.
, Vol.
1
, pp
3
51
.
13.
Yan, X, 1993, “A Preheated-Wall Transient Method Using Liquid Crystals for the Measurement of Heat Transfer on External Surfaces and in Ducts,” Ph. D. Dissertations, University of California, Davis.
14.
Yan, X., and Sanici, N., 1998, “Heat Transfer Measurements From a Flat Plate to a Swirling, Impinging Jets,” Proceedings of 11th International Heat Transfer Conference, Kyonju, Korea.
This content is only available via PDF.
You do not currently have access to this content.