CAJ | 학술논문

运用商用CFD软件Fluent,采用三维建模的方法分别建立圆柱形蜂窝密封和圆锥形蜂窝密封的几何模型,针对蜂窝密封几何结构复杂、密封间隙小且径向流动参数变化剧烈的特点,采用了六面体网格划分、增加密封间隙径向网格密度和非平衡壁面函数湍流模型等方法,依次计算出两种形式的密封结构的主刚度、交叉刚度和主阻尼,并与相关的实验数据和解析计算结果相比较,得出本文数值计算方法比原有的解析计算方法有更好准确性,为今后的蜂窝密封动力特性分析和密封结构的优化设计提供一种有效的分析手段.
운용상용CFD연건Fluent,채용삼유건모적방법분별건립원주형봉와밀봉화원추형봉와밀봉적궤하모형,침대봉와밀봉궤하결구복잡、밀봉간극소차경향류동삼수변화극렬적특점,채용료륙면체망격화분、증가밀봉간극경향망격밀도화비평형벽면함수단류모형등방법,의차계산출량충형식적밀봉결구적주강도、교차강도화주조니,병여상관적실험수거화해석계산결과상비교,득출본문수치계산방법비원유적해석계산방법유경호준학성,위금후적봉와밀봉동력특성분석화밀봉결구적우화설계제공일충유효적분석수단.
Computational fluid dynamics (CFD) has been employed to calculate the dynamic coefficient of a honey-comb seal. 3-D models of a cylindrical honeycomb seal and a conical honeycomb seal were built. Because the ge-ometry of the honeycomb seal is complex and the flow parameters change dramatically in the narrow gap of the seal, hexahedral meshes, high-density meshes along the radial direction of the gap of the seal and non-equilibrium wall functions were used in order to improve numerical computational accuracy. Finally, the numerical computational re-suits were compared with analytical computational results and experimental data. It was found that the numerical computational results were more similar to the experimental data, and provide a better method for the analysis of the dynamic performance and the design optimization of honeycomb seals in the future.