Title

Effect Of Non-Symmetrical Lateral Diffusion On Film Cooling Effectiveness From A Row Of Shaped Holes

Abstract

A study was conducted to investigate the effect of changing the diffusion angle of fan-shaped holes in a manner as to gradually disrupt the holes' symmetry. The baseline fan geometry had a 7° half-angle lateral diffusion and an 11° laidback expansion. Film cooling effectiveness was studied at five different blowing ratios - from 0.5 to 2.0 - as one of the lateral half-angles was varied from 5° to 13°. Results indicate that film cooling effectiveness varies little at the lower blowing ratios, but above a blowing ratio of unity, begins a strong contrast in performance as the smaller-angled holes show marked jet differentiation and the larger-angled holes show a lopsided "widening." This suggests the coolant momentum diffusion on one side of the hole's exit is balanced by higher jet integrity on the other. For the more asymmetric cases, this balance resulted in more sustained performance over the range of blowing ratios tested. © 2008 by the American Institute of Aeronautics and Astronautics, Inc.

Publication Date

1-1-2008

Publication Title

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2008-5165

Socpus ID

77957840157 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77957840157

This document is currently not available here.

Share

COinS