文献类型：期刊文献

英文题名：Erosion Investigation of Dimple Wall using Erosion-Coupled Dynamic Mesh

作者：Ren, Libo[1];Long, Xiangyi[2];Wang, Xiaowei[1];He, Hailan[1];Zhang, Manli[1];Lu, Hao[2]

机构：[1]Shanghai Heat Transfer Equipment Co Ltd, Shanghai 201508, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：8

期号：42

起止页码：39303

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001141061700001)】；

基金：This work is supported by the Shanghai Rising-Star Program (Grant No. 22QA1402600) and the National Natural Science Foundation of China (Grant No. 52000072).

语种：英文

摘要：The erosion of the dimple walls is investigated experimentally and numerically. A mathematical simulation framework was proposed to describe quantitatively the morphological evolution of the dimple wall quantitatively. As the wall shape continues to evolve, the wall shear stress, mesh deformation, and erosion rate would decrease and gradually tend to be constant. Two distinct regions have been identified along the dimple's windward wall surface: the wall's central area and the lateral area. In the central region, the wall profile flare occurs mainly in the early stage. In the lateral region, profile flare occurs mainly in the later stages of erosion. The microhardness of the wall surface shows a positive correlation with the erosion rate. The liquid-solid two-phase impinges on the wall at a smaller angle, and the wall material removal process is mainly based on the microcutting and slip mechanism. The results provide theoretical implications for the design of dimple-shaped, wide-channel welded plate heat exchangers.