Insights Into the Flow Field and Performance of a Boundary Layer Pump

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-19 DOI:10.1115/1.4063834

David John Rajendran, Kyril Palaveev, Eduardo Anselmi, Mani Santhanakrishnan, Vassilios Pachidis

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Abstract

Abstract A flow field analysis of a realistic, integrated, multi-disc boundary layer pump as is necessary for investigating the reasons for typically quoted low efficiencies in such pumps is described. The study focuses on the 3D RANS solutions of a water boundary layer pump model created to replicate a design which consists of 170 discs and a volute channel. A baseline study is performed to investigate the rotor-only and volute-only flow fields and identify the losses in each as separate systems. Thereafter, an integrated model is characterized for different operating conditions. The flow fields of all three models are discussed and the results of the integrated model are compared to the experimental data. The results from the rotor-only model confirm the typically made claim that the rotor efficiency is relatively high, which in this case is 87% at the design point. The volute on its own indicated a hydraulic efficiency of ~97%. However, the integrated model yielded a rotor efficiency of ~74% and an overall pump efficiency of 51% at the design point, clearly outlining the fact that the effect of the volute integrated with the rotor is the reason for both the rotor and pump efficiency degradation. The reason for this drop in efficiency is discussed by highlighting the change in the flow topologies. The insights into the flow field and the identification of the reason for inefficiencies using a separated component analysis approach provides directions for avenues in which design improvements need to be attempted.

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边界层泵的流场与性能研究

摘要:本文描述了一种实际的、集成的、多盘边界层泵的流场分析，这是研究这种泵通常引用的低效率的原因所必需的。该研究的重点是水边界层泵模型的3D RANS解决方案，该模型复制了一个由170个圆盘和一个蜗壳通道组成的设计。进行了基线研究，以调查仅转子和仅蜗壳的流场，并确定每个系统中的损失。然后，对不同工况下的综合模型进行了表征。讨论了三种模型的流场，并将综合模型的计算结果与实验数据进行了比较。仅转子模型的结果证实了通常提出的要求，即转子效率相对较高，在这种情况下，在设计点为87%。蜗壳本身的水力效率约为97%。然而，在设计点，集成模型产生了~74%的转子效率和51%的整体泵效率，清楚地概述了蜗壳与转子集成的影响是转子和泵效率下降的原因。通过强调流拓扑中的变化，讨论了效率下降的原因。对流场的洞察和使用分离组件分析方法确定低效率的原因为需要尝试改进设计的途径提供了方向。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.