0
research-article

The Maximum Skin Friction and Flow Field of a Planar Impinging Gas Jet

[+] Author and Article Information
Adam Ritcey

Department of Mechanical Engineering McMaster University Hamilton, ON, Canada
ritceya@mcmaster.ca

Joesph R. McDermid

Department of Mechanical Engineering McMaster University Hamilton, ON, Canada
mcdermi@mcmaster.ca

Samir Ziada

Department of Mechanical Engineering McMaster University Hamilton, ON, Canada
ziadas@mcmaster.ca

1Corresponding author.

ASME doi:10.1115/1.4036717 History: Received February 06, 2017; Revised April 27, 2017

Abstract

The maximum skin friction and flow field is experimentally measured on a planar impinging gas jet using oil film interferometry (OFI) and particle image velocimetry (PIV), respectively. A jet nozzle width of W = 15 mm, impingement ratios H=W = 4;6;8; 10, and a range of jet Reynolds numbers Rejet = 11000- 40000 is tested to provide a parametric map of the maximum skin friction. The maximum skin friction predictions of Phares et al. [1] for plane jets agree within 5 % of the current OFI results for H=W = 6, but deviates upwards of 28 % for other impingement ratios. The maximum skin friction is found to be less sensitive to changes in the impingement ratio when the jet standoff distance is roughly within the potential core length of the jet. PIV measurements show turbulence transition locations moving towards the nozzle exit with increasing Reynolds number, saturation in the downstream evolution of the maximum axial turbulence intensity before reaching a maximum peak upon impingement, followed by sudden damping at the plate surface. As the flow is redirected, there is an orthogonal redistribution of the fluctuating velocity components, and local peaks in both the axial and transverse turbulence intensity distributions at the plate locations of the maximum skin friction.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

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