지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수2
ABSTRACT IABSTRACT (KOREAN) IVTABLE OF CONTENTS VIINOMENCLATURE XTABLE CAPTIONS XIVFIGURE CAPTIONS XV1. INTRODUCTION 11.1 Background 11.2 Literature Survey 41.2.1 Passive control approach 41.2.2 Active control approach 61.2.3 Combination of passive and active control approaches 71.2.4 Single-objective optimization 81.2.5 Multi-objective optimization 111.3 Motivations and Objectives 122. NUMERICAL ANALYSIS 142.1 Computational Domain Description 142.1.1 Circumferential casing grooves 152.1.2 Single casing groove combined with injection 162.2 Computational Grids and Boundary Conditions 172.3 Unsteady Reynolds-averaged Navier-Stokes Equations 202.4 Turbulence Models 222.4.1 Shear stress transport turbulence model 222.4.2 k-ε turbulence model 242.5 Convergence Criteria 253. OPTIMIZATION METHODOLOGY 273.1 Design of Experiments 273.1.1 Latin hypercube sampling 273.2 Surrogate Models 293.2.1 Response surface approximation model 293.2.2 Radial basis neural network model 293.2.3 Kriging model 313.2.4 Weighted-average model 323.3 Single-Objective Optimization Technique 343.4 Multi-Objective Optimization Technique 353.5 Optimization Algorithm 374. RESULTS AND DISCUSSION 384.1 Grid Dependency Test 384.2 Validation of Numerical Results 414.3 Performance Enhancement via Application of Circumferential CasingGrooves 424.4 Design Optimization of Circumferential Casing Grooves 504.4.1 Results of single-objective optimization 504.4.2 Results of Multi-objective optimization 604.5 Unsteady Flow Analysis via Optimization of Compressor Blade with Circumferential Casing Grooves 694.5.1 Objective function and design variables 694.5.2 Results of single-objective optimization 704.5.3 Unsteady flow analysis 804.6 Optimization of Casing Groove Design Combined with Injection 884.6.1 Parametric study on design variables 884.6.2 Results of multi-objective optimization 895. CONCLUSIONS 1065.1 Concluding Remarks 1065.2 Suggestions for Further Work 108REFERENCES 110AUTHOR’S PUBLICATIONS 128ACKNOWLEDGMENTS (KOREAN) 144
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