Open AccessOptimization research of film cooling structure with fan-sharped hole
Author(s) -
Ping Chen,
Zexuan Wang,
Tingting Qi,
Ning Zuo
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1750/1/012081
Subject(s) - fan out , finite element method , range (aeronautics) , mechanics , function (biology) , vortex , physics , geometry , section (typography) , materials science , optics , mathematics , computer science , thermodynamics , composite material , optoelectronics , evolutionary biology , biology , operating system , wafer
In order to improve the film cooling efficiency, the fan-shaped film cooling holes are optimized. The length of the straight hole section (L m ), the forward angle(a) and the backward angle (β) were selected as the design variables. The area-averaged film cooling efficiency witin the range of X/D =50 (X is the downstream distance of the hole, D is the hole diameter)was taken as the objective function. The Co-kriging surrogate model was established according to the sample points by Latin Hypercube method and the finite element calculation results by calculating two meshing with different quality. The genetic algorithm was adopted to find the optimal fan-shaped hole structure. Under the condition that blowing ratio is 1.5, the optimized L m , a and β are 2.6D, 41°, and 14°, respectively, the cooling efficienct increased by 45% compared with the reference structure. The results show that a smaller straight hole section and a larger backward expansion angle can effectively inhibit the generation of kidney-shaped vortex pairs and improve the film cooling efficiency.