목차

ABSTRACT ··········································································I
TABLE OF CONTENTS ·························································III
NOMENCLATURE ······························································V
TABLE CAPTIONS ·····························································VII
FIGURE CAPTIONS ···························································VIII
1. INTRODUCTION ·······························································1
1.1 Background ····································································1
1.2 Literature Survey ······························································4
1.2.1 Cylindrical film-cooling hole·······································4
1.2.2 Shaped film-cooling hole ···········································5
1.3 Motivations and Objectives ················································8
2. NUMERICAL ANALYSIS ····················································10
2.1 Configuration of the film-cooling holes ··································10
2.2 Computational Domain, Grid, and Boundary Conditions ··············11
2.3 Reynolds-Averaged Navier Stokes Equations ···························15
2.4 Shear Stress Transport Turbulence Model ·······························17
2.5 Convergence Criteria ························································19
3. OPTIMIZATION NETHODOLOGY ······································20
3.1 Design Space ·································································20
3.2 Design of Experiments ······················································20
3.3 Kriging Model ·······························································21
3.4 Single-Objective Optimization ············································22
4. RESULTS AND DISCUSSION ··············································24
4.1 Performance Index ··························································24
4.2 Grid Dependency Test ······················································26
4.3 Validation of CFD Results ··················································28
4.3.1 Bended hole and converged inlet hole ···························28
4.3.2 Converging-diverging film-cooling hole ························28
4.4 Optimization of Bended Film Cooling Hole ·····························31
4.4.1 Objective function and design variables ························31
4.4.2 Parametric study ····················································32
4.4.3 Optimization results ················································34
4.5 Performance evaluation of a converged inlet shaped hole ·············48
4.5.1 Geometric parameters and performance function ··············48
4.5.2 Comparative study ·················································51
4.5.3 Parametric Study ···················································57
4.6 Performance evaluation of a converging diverging hole ·············72
4.6.1 Configuration of proposed converging-diverging hole ········72
4.6.2 Comparative study ·················································75
5. CONCLUSIONS ·······························································87
5.1 Concluding Remarks ························································87
5.2 Future works ·································································89
REFERENCES ·····································································90
AUTHOR’S PUBLICATIONS ··················································96