Film cooling of the gas turbine endwall by discrete-hole injection

M. Y. Jabbari; K. C. Marston; E. R.G. Eckert; R. J. Goldstein

doi:10.1115/1.2836637

Film cooling of the gas turbine endwall by discrete-hole injection

M. Y. Jabbari, K. C. Marston, E. R.G. Eckert, R. J. Goldstein

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

Film cooling performance for injection through discrete holes in the endwall of a turbine blade is investigated. The effectiveness is measured at 60 locations in the region covered by injection. Three nominal blowing rates, two density ratios, and two approaching flow Reynolds numbers are examined. Analysis of the data reveals that even 60 locations are insufficient for the determination of the field of film cooling effectiveness with its strong local variations. Visualization of the traces of the coolant jets on the endwall surface, using ammonium-diazo-paper, provides useful qualitative information for the interpretation of the measurements, revealing the paths and interaction of the jets, which change with blowing rate and density ratio.

Original language	English (US)
Pages (from-to)	278-284
Number of pages	7
Journal	Journal of Turbomachinery
Volume	118
Issue number	2
DOIs	https://doi.org/10.1115/1.2836637
State	Published - Apr 1996

Access

10.1115/1.2836637

Fingerprint Dive into the research topics of 'Film cooling of the gas turbine endwall by discrete-hole injection'. Together they form a unique fingerprint.

Cite this

@article{47e291078f2847368adb48bdcc10d1ee,

title = "Film cooling of the gas turbine endwall by discrete-hole injection",

abstract = "Film cooling performance for injection through discrete holes in the endwall of a turbine blade is investigated. The effectiveness is measured at 60 locations in the region covered by injection. Three nominal blowing rates, two density ratios, and two approaching flow Reynolds numbers are examined. Analysis of the data reveals that even 60 locations are insufficient for the determination of the field of film cooling effectiveness with its strong local variations. Visualization of the traces of the coolant jets on the endwall surface, using ammonium-diazo-paper, provides useful qualitative information for the interpretation of the measurements, revealing the paths and interaction of the jets, which change with blowing rate and density ratio.",

author = "Jabbari, {M. Y.} and Marston, {K. C.} and Eckert, {E. R.G.} and Goldstein, {R. J.}",

year = "1996",

month = apr,

doi = "10.1115/1.2836637",

language = "English (US)",

volume = "118",

pages = "278--284",

journal = "Journal of Turbomachinery",

issn = "0889-504X",

publisher = "American Society of Mechanical Engineers(ASME)",

number = "2",

}

TY - JOUR

T1 - Film cooling of the gas turbine endwall by discrete-hole injection

AU - Jabbari, M. Y.

AU - Marston, K. C.

AU - Eckert, E. R.G.

AU - Goldstein, R. J.

PY - 1996/4

Y1 - 1996/4

N2 - Film cooling performance for injection through discrete holes in the endwall of a turbine blade is investigated. The effectiveness is measured at 60 locations in the region covered by injection. Three nominal blowing rates, two density ratios, and two approaching flow Reynolds numbers are examined. Analysis of the data reveals that even 60 locations are insufficient for the determination of the field of film cooling effectiveness with its strong local variations. Visualization of the traces of the coolant jets on the endwall surface, using ammonium-diazo-paper, provides useful qualitative information for the interpretation of the measurements, revealing the paths and interaction of the jets, which change with blowing rate and density ratio.

AB - Film cooling performance for injection through discrete holes in the endwall of a turbine blade is investigated. The effectiveness is measured at 60 locations in the region covered by injection. Three nominal blowing rates, two density ratios, and two approaching flow Reynolds numbers are examined. Analysis of the data reveals that even 60 locations are insufficient for the determination of the field of film cooling effectiveness with its strong local variations. Visualization of the traces of the coolant jets on the endwall surface, using ammonium-diazo-paper, provides useful qualitative information for the interpretation of the measurements, revealing the paths and interaction of the jets, which change with blowing rate and density ratio.

UR - http://www.scopus.com/inward/record.url?scp=4243140890&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243140890&partnerID=8YFLogxK

U2 - 10.1115/1.2836637

DO - 10.1115/1.2836637

M3 - Article

AN - SCOPUS:4243140890

VL - 118

SP - 278

EP - 284

JO - Journal of Turbomachinery

JF - Journal of Turbomachinery

SN - 0889-504X

IS - 2

ER -