Experimental study and large Eddy simulation of a coaxial jet with perforated obstacles to control thermal mixing characteristics


Kok B., VAROL Y., AYHAN H., ÖZTOP H. F.

EXPERIMENTAL HEAT TRANSFER, vol.31, no.2, pp.161-182, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 2
  • Publication Date: 2018
  • Doi Number: 10.1080/08916152.2017.1405100
  • Journal Name: EXPERIMENTAL HEAT TRANSFER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.161-182
  • Hacettepe University Affiliated: Yes

Abstract

Thermal mixing phenomena of a coaxial jet with perforated obstacles are analyzed both experimentally and numerically. Perforated obstacles are used in front of a coaxial jet that has different temperatures of the fluid to control the thermal mixing behavior. An experimental set-up was constructed to perform several cases and all cases are simulated by using large eddy simulation (LES) turbulence model. Results of the study presented that inserting perforated obstacle affects the mixing performance positively and the best mixing performance is obtained in the case that the obstacle has the highest permeability. Experimental and computational results were compared and a good agreement was obtained.