A quick 3D BEM iterative algorithm for partially cavitating flows over cylindrical bodies at angles of attack

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2024-08-14 DOI:10.1016/j.enganabound.2024.105912

引用次数: 0

Abstract

An iterative three dimensional Boundary Element Method (BEM) is formulated to investigate partial cavitating flows around cylindrical bodies at various angles of attack and validation is pursued through comparison with other numerical models. Also, in this article the effect of angle of attack on two types of head (conical and blunt-head) is investigated. The results show that the effect of angle of attack on variation of cavity shape at blunt-head cylinder is more considerable. The need for a very short time (less than 10 min) to reach the desirable convergence and also proper accuracy in calculating the properties of cavitating flows are considerable advantages of this method. Also, in this research, the effect of the length of a cylindrical body on the cavity length has been investigated. The results confirm that if the length of the body is greater than 1.7 times the cavity length, the effects of the negative pressure behind the cylindrical body on the cavity length can be neglected.

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攻角圆柱体上部分空化流的快速 3D BEM 迭代算法

本文提出了一种迭代三维边界元素法（BEM），用于研究不同攻角下圆柱体周围的部分空化流，并通过与其他数值模型的比较进行了验证。此外，本文还研究了攻角对两种头部（锥形和钝头）的影响。结果表明，攻角对钝头气缸空腔形状变化的影响更大。这种方法的优点是只需要很短的时间（少于 10 分钟）就能达到理想的收敛效果，而且在计算空化流的特性时也非常精确。此外，本研究还探讨了圆柱体长度对空腔长度的影响。结果表明，如果圆柱体的长度大于空腔长度的 1.7 倍，则可以忽略圆柱体后面的负压对空腔长度的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.