Film cooling effectiveness and mass/heat transfer coefficient downstream of one row of discrete holes

R. J. Goldstein, P. Jin, R. L. Olson

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

A special naphthalene sublimation technique is used to study the film cooling performance downstream of one row of holes of 35 cleg inclination angle with 3d hole spacing and relatively small hole length to diameter ratio (L/d = 6.3). Both film cooling effectiveness and mass/heat transfer coefficient are determined for blowing rates from 0.5 to 2.0 with density ratio of J.O. The mass transfer coefficient is measured using pure air film injection, while the film cooling effectiveness is derived from comparison of mass transfer coefficients obtained following injection of naphthalene- vapor-saturated air with those from pure air injection. This technique enables one to obtain detailed local information on film cooling performance. The laterally averaged and local film cooling effectiveness agree with previous experiments. The difference between mass/heat transfer coefficients and previous heat transfer results indicates that conduction error may play an important role in the earlier heat transfer measurements.

Original languageEnglish (US)
Pages (from-to)225-232
Number of pages8
JournalJournal of Turbomachinery
Volume121
Issue number2
DOIs
StatePublished - Apr 1999

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