|Table of Contents|

Experimental study of film-cooling characteristics of DJFC holes located upstream of a vane(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年02期
Page:
36-43
Research Field:
研究与设计
Publishing date:

Info

Title:
Experimental study of film-cooling characteristics of DJFC holes located upstream of a vane
Author(s):
LEI Jiang1;  LU Ruishan1;  QIN Ling1;  LUO Ding1;  HE Jianhong1;  MA Yuan2
(1.State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University, Xi’an 710049, China; 2.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
Keywords:
film-cooling;  DJFC;  vane cascade;  PSP;  blowing ratio;  density ratio
PACS:
V231.1
DOI:
-
Abstract:
To further explore the potential of film-cooling on the upstream endwall, the film-cooling characteristics of DJFC(double-jet film-cooling)holes on the endwall upstream of a vane cascade was studied by experiments and corresponding results were compared with double-row streamwise cylindrical holes located in the same position.Effects of blowing ratio and density ratio were discussed.PSP(pressure sensitive paint)was applied to measure film-cooling effectiveness on the endwall.Results show, though increased blowing ratio induces film lift-off, film coverage on the mid- and rear-portion of the endwall improves.Increased density ratio suppresses lift-off, enhances lateral coverage and increases lateral-average of effectiveness.Compared to SC(streamuise cylindrical)holes, anti-kidney vortices form at the exit of DJFC holes and thus decreases lift-off.However, DJFC holes are more sensitive to vortices generated in the cascade passage.At high blowing ratios, film effectiveness of DJFC holes are more advantageous over SC holes, especially DJFC I.

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Last Update: 2020-04-25