不同编织方式下陶瓷基复合材料表面流动特性数值计算研究  

Numerical Study on Surface Flow Characteristics of Ceramic Matrix Composites with Different Weaving Patterns Composites with Different Weaving Patterns

作　　者：张金月 杨荣菲 吴兴爽 葛宁 Jin-yue Zhang;Rong-fei Yang;Xing-shuang;Wu Ning Ge(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics)

机构地区：[1]College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics

出　　处：《风机技术》2024年第2期38-43,共6页Chinese Journal of Turbomachinery

基　　金：National Science and Technology Major Project (Y2019-I-0018-0017)。

摘　　要：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, Tex Gen 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.

关 键 词：Ceramic Matrix Composites Weave Pattern Boundary Layer Transition PIT Flow Loss 

分 类 号：TB33[一般工业技术—材料科学与工程]