This article is cited in 12 papers

Film cooling performance for cylindrical holes embedded in contoured craters: effect of the crater depth

J. L. Fu^a, L. C. Bai^bc, C. Zhang^bc, P. F. Ju<sup>bc

a</sup> Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China
^b Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin, 300384, China
^c Tianjin University of Technology, Tianjin, 300384, China

Abstract: The present study deals with the flow field and cooling performance for flat-plate cylindrical film cooling holes embedded in contoured craters, especially considering the effect of the crater depth. A test matrix of the crater depth ranging from 0.25 to 1.25 times of the cylindrical hole diameter and the blowing ratio ranging from 0.5 to 2.0 is used in CFD computations. The numerical results show that the flow fields downstream from the hole exit can be altered significantly due to interaction between the ejected coolant and contoured crater. The cooling performance depends on both the specific crater depth and blowing ratio; however, the cratered hole is always superior to the cylindrical hole in terms of the area-averaged cooling effectiveness regardless of the crater depth and blowing ratio. The cratered hole with a crater depth equal to the hole diameter is recommended.

Keywords: film cooling, contoured crater, crater depth, blowing ratio, anti-kidney-shaped vortex pair, adiabatic cooling effectiveness.

UDC: 536.24; 621.45

Received: 05.02.2019
Revised: 25.04.2019
Accepted: 27.05.2019

DOI: 10.15372/PMTF20190612

 English version: Journal of Applied Mechanics and Technical Physics, 2019, 60:6, 1068–1076

Bibliographic databases:

•