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《Journal of Beijing University of Aeronautics and Astronautics》 2015-08
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Numerical simulation and performance analysis of leaf seal

LIU Jian;WANG Zhili;DING Lei;School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics;  
In order to obtain the result of pressure and velocity distribution and leakage of the leaf seal system which is applied to high-speed rotor,a mathematical model of sealing zone flow field calculated numerically with SIMPLER method and finite difference method was established. A software based on the algorithm referred was also designed specially for the performance analysis of leaf seal system. The influence of different structure parameters and working conditions on the system's performance was discussed. Analysis result shows that the leakage increases linearly with the sealing pressure and decreases slightly with the increase of rotor speed. Increasing width,reducing spacing between front / back cover plate to rotor and decreasing length are beneficial in decreasing the leakage of the system. While changing installation angle direction of the leaf has little influence on leakage. Research on dynamic response between leaf and rotor will be carried out based on the results of the flow field.
【CateGory Index】: TB42
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