首页|Numerical Study on Surface Flow Characteristics of Ceramic Matrix Composites with Different Weaving Patterns
Numerical Study on Surface Flow Characteristics of Ceramic Matrix Composites with Different Weaving Patterns
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Ceramic matrix composites(CMCs)are one of the most promising materials in the field of gas turbines,with superior weight and thermal properties.Its surface morphology is different from the traditional casting airfoil components,which mainly comes from different weaving methods and different braided tow thickness.However,few people have studied the influence of surface morphology of ceramic matrix composites(CMCs)on the development of boundary layer and the resulting flow loss.In this paper,TexGen is used to generate different surface morphology structures of ceramic matrix composites(CMCs),and the surface flow characteristics of corresponding CMCs plates are numerically studied.It is found that the slope of the displacement thickness of the woven surface first increases and then decreases in the whole transition interval.Thicker braided tow thickness and denser braiding method will induce earlier flow transition phenomenon and produce greater flow loss;The flow loss on the surface of CMCs plate is mainly composed of the vortex loss in the pit and the boundary layer loss outside the pit,and the boundary layer loss is dominant.The weaving methods has a greater influence on the flow state and flow loss of the boundary layer.
Ceramic Matrix CompositesWeave PatternBoundary Layer TransitionPitFlow Loss
Jin-yue Zhang、Rong-fei Yang、Xing-shuang Wu、Ning Ge
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College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics
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