Turbomachinary Optimization And Design Based On CFD Technology: Theory And Practice

A growing harsh desire is essential in the research and design of the advanced turbomachinery which possesses the characteristics of high loading, high efficiency and low noise and so on. By using the CFD methodology, the theory of optimization design in turbomachinery is investigated and some correlative theory on research and application is also established in radial compressor, wind turbine and counter rotating turbine.1 For centrifugal compressor, the basic theory and optimization design method are worked on and the sensitive parameters of the rotor optimization are filtered. Moreover, two objectives of pressure and efficiency are optimized on the high-pressure-ratio centrifugal rotor of SRV2 by means of CFD. The results of optimization reveal significant improvement in pressure ratio and efficiency of this rotor by using the above-mentioned method.2 The characteristics of wind turbine aerofoil determine the performance of overall wind machine. Research about the effects of turbulence models on analysis precision of aerodynamic performance of wind-powered aerofoil is conducted based on the method of CFD. Subsequently, research of wind turbine with fin is attempted. The results show a better static feature of wind turbine with fin can be gained. Meanwhile, an optimization platform of aerofoil is set up by using CFD, through which two types of aerofoil with better incidence angle characteristic are successfully achieved.3 The control on work ratio is one of key difficult problems for the further application of 1 + 1/2 counter rotating turbine. A research about lowering the work ratio of counter rotating turbine is finished by using the control technology of bowed blade to low pressure rotor. The results reveal that positive bowed blade applied into low pressure rotor can reduce work ratio of low pressure turbine by 2.6% with efficiency unchanged.