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冷却对高压比离心压气机性能影响规律及机理研究

摘要第3-4页
Abstract第4-5页
CHAPTER 1 INTRODUCTION第14-16页
CHAPTER 2 STATE OF ART AND RESEARCH MOTIVATION第16-36页
    2.1 Research background第16-17页
    2.2 Centrifugal compressor第17-21页
        2.2.1 Centrifugal compressor nomenclature第18-19页
        2.2.2 Centrifugal compressors design第19-20页
        2.2.3 Impeller design第20-21页
    2.3 High pressure ratio centrifugal compressor第21-25页
    2.4 High pressure ratio centrifugal compressors in a gas turbine第25-26页
    2.5 Challenges for a high pressure ratio centrifugal compressor第26-28页
    2.6 Cooling in centrifugal compressors第28-33页
        2.6.1 Cooling the impeller using cooled air jet第28-32页
        2.6.2 Cooling using water addition to the inlet flow第32-33页
    2.7 Diabatic performance of a centrifugal compressor第33-34页
    2.8 Integrated cooling concept第34-36页
CHAPTER 3 FLOW MODELING AND SIMULATION第36-49页
    3.1 Geometrical model第36-38页
    3.2 Mesh generation第38-39页
    3.3 Governing equations第39-40页
    3.4 Turbulence modeling第40-44页
        3.4.1 Reynolds averaged Navier-Stokes (RANS) equations第41-42页
        3.4.2 Two equation turbulence models第42页
        3.4.3 k-epsilon model第42-43页
        3.4.4 Wilcox k-omega model第43-44页
        3.4.5 Shear Stress Transport (SST) model第44页
    3.5 Conjugate heat transfer第44-45页
    3.6 Computational methodology第45-46页
    3.7 Boundary condition第46页
    3.8 Estimation of error source第46-49页
        3.8.1 Numerical error第47页
        3.8.2 Numerical modeling error in turbomachinery第47-49页
CHAPTER 4 SIMULATION RESULTS AND ANALYSIS第49-78页
    4.1 Cooling on all external walls第49-65页
        4.1.1 Effects on the pressure ratio第49-54页
        4.1.2 Effects on the efficiency第54-59页
        4.1.3 Effects on the impeller temperature第59-60页
        4.1.4 Effects on the impeller walls heat flux第60-62页
        4.1.5 Effects on the charge air temperature第62-64页
        4.1.6 Effects on the flow Mach number第64-65页
    4.2 Cooling on different external walls第65-78页
        4.2.1 Effects on impeller temperature第67-68页
        4.2.2 Effects on pressure ratio第68-71页
        4.2.3 Effects on compression work第71-74页
        4.2.4 Effects on polytropic efficiency第74-78页
CHAPTER 5 CONCLUSIONS AND IMPLICATIONS第78-80页
    5.1 Conclusions and remarks第78-79页
    5.2 Implications第79-80页
BIBLIOGRAPHY第80-86页
Acknowledgement第86-88页
RESUME第88-89页

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