The role of jet inlet geometry in impinging jet heat transfer, modeling and experiments


Koseoglu M. F. , Baskaya Ş.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES, vol.49, no.8, pp.1417-1426, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 8
  • Publication Date: 2010
  • Doi Number: 10.1016/j.ijthermalsci.2010.02.009
  • Title of Journal : INTERNATIONAL JOURNAL OF THERMAL SCIENCES
  • Page Numbers: pp.1417-1426
  • Keywords: Confined impinging jets, Aspect ratio, Liquid crystal, Elliptic jet, Stagnation region, NUMERICAL INVESTIGATIONS, TURBULENCE MODELS, ELLIPTIC JETS, GAS

Abstract

Effects of jet inlet geometry and aspect ratio on local and average heat transfer characteristics of totally nine confined impinging jets have been investigated experimentally using thermochromic liquid crystals and numerically by using a 3-D low Reynolds number k-epsilon model. Experimental study by using liquid crystals for temperature measurement was conducted for three different jet exit geometries (circular, elliptic, rectangular). In addition, simulations were performed at the same mass flow rate for totally nine jet exit geometries including circular, elliptic and rectangular jets with different aspect ratios for dimensionless jet to plate distances 2, 6, and 12.