0
Technical Briefs

Numerical Study on Stagnation Point Heat Transfer by Jet Impingement in a Confined Narrow Gap

[+] Author and Article Information
Y. Q. Zu

School of the Built Environment, University of Nottingham, Nottingham NG7 2RD, UK

Y. Y. Yan1

School of the Built Environment, University of Nottingham, Nottingham NG7 2RD, UKyuying.yan@nottingham.ac.uk

J. Maltson

 Siemens Industrial Turbomachinery Limited, Lincoln LN5 7FD, UK

1

Corresponding author.

J. Heat Transfer 131(9), 094504 (Jun 25, 2009) (4 pages) doi:10.1115/1.3139183 History: Received September 04, 2008; Revised February 19, 2009; Published June 25, 2009

In this paper, the heat transfer characteristics of a circular air jet vertically impinging on a flat plate near to the nozzle (H/d=16, where H is the nozzle-to-target spacing and d is the diameter of the jet) are numerically analyzed. The relative performance of seven turbulent models for predicting this type of flow and heat transfer is investigated by comparing the numerical results with available benchmark experimental data. It is found that the shear-stress transport (SST) kω model and the large Eddy simulation (LES) time-variant model can give better predictions for the performance of fluid flow and heat transfer; especially, the SST kω model should be the best compromise between computational cost and accuracy. In addition, using the SST kω model, the effects of jet Reynolds number (Re), jet plate length-to-jet diameter ratio (L/d), target spacing-to-jet diameter ratio (H/d), and jet plate width-to-jet diameter ratio (W/d) on the local Nusselt number (Nu) of the target plate are examined; a correlation for the stagnation Nu is presented.

FIGURES IN THIS ARTICLE
<>
Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 4

Effects of L/d on Nusg

Grahic Jump Location
Figure 5

Effects of H/d on Nusg

Grahic Jump Location
Figure 6

Comparison of numerical results with correlation: (a) H/d=3.0, L/d=50; (b) H/d=3.0, W/d=20; and (c) L/d=50, W/d=20

Grahic Jump Location
Figure 3

Effects of W/d on Nusg

Grahic Jump Location
Figure 2

Local Nusselt number distribution on the positive x-axis

Grahic Jump Location
Figure 1

The physical domain and boundary conditions

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In