Review of experimental studies of the efficiency of film cooling of a flat surface

Authors: Melnikov A.I.
Published in issue: #11(28)/2018
DOI: 10.18698/2541-8009-2018-11-407
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
Keywords: film cooling, efficiency of film cooling, flat surface, measured data, blowing of cooler, line of bore, adiabatic wall, verification
Published: 20.11.2018

The paper deals with the review of articles containing descriptions of experimental researches of efficiency of film cooling of a flat surface. Film cooling is one of the main and most effective ways of cooling the blades of modern high-temperature gas turbines, therefore, continuously conducted research in search of new ways to improve the efficiency of film cooling. The paper is concerned that the main direction of such studies is to find the optimal shape of the holes for the cooling air injection and the optimal arrangement of these holes on the protected surface. Experimental studies of the efficiency of film cooling require a lot of time and material costs, so often in the study of new engineering solutions are limited to numerical calculations. However, numerical models to obtain adequate results of calculation still need to be verified by experimental data. The author showed that in this review were studied the articles describing experiments to determine the efficiency of film cooling of a flat surface with a single-row coolant injection, which provides all the data necessary for verification as numerical computational models or semi-analytical techniques. The author compared the experimental data with the results of calculating the efficiency of film cooling by the Kutateladze — Leontiev formula.

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