Performance investigations of the two-phase mixer for liquid metal magnetohydrodynamic generator

IF 2.2 3区工程技术 Q2 MECHANICS

Theoretical and Computational Fluid Dynamics Pub Date : 2025-02-08 DOI:10.1007/s00162-025-00738-0

Shaozheng Wang, Zhongtian Liu, Hulin Huang, Peng Lu

{"title":"Performance investigations of the two-phase mixer for liquid metal magnetohydrodynamic generator","authors":"Shaozheng Wang, Zhongtian Liu, Hulin Huang, Peng Lu","doi":"10.1007/s00162-025-00738-0","DOIUrl":null,"url":null,"abstract":"To efficiently utilize gas driving liquid metal for two-phase magnetohydrodynamic power generatior, a double-nozzle venturi mixer was proposed and the impact of mixer key dimensions, applied magnetic field and load factor on the mixing characteristics and power generation performance were investigated by adopting the VOF (volume of fluid) method in this paper. The results show that the velocity of liquid metal is greatly increased by the high-pressure gas in the mixer and the two-phase churn flow regime with lower two-phase slip ratio and higher uniformity, which represents a better mixing effect, can be found in the mixer with the smaller ratio of nozzle area to gas inlet area (\\(S_{\\textrm{n}}/S_{\\textrm{g}})\\) and the larger ratio of mixing chamber area to total inlet area (\\(S_{\\textrm{m}}/S_{\\textrm{i}})\\). In the range of this study, the output current, output power, and power generation efficiency of the LMMHD generator reach the maximum as \\(S_{\\textrm{n}}/S_{\\textrm{g}}=0.040\\) and \\(S_{\\textrm{m}}/S_{\\textrm{i}}=0.144\\). When the magnetic field is small, appropriately increasing it not only enhances the volume fraction of liquid metal in the power generation channel, but also upgrades the two-phase uniformity, which are beneficial to improve the output power \\(P_{\\textrm{wo}}\\) and power generation efficiency \\(\\eta \\). However, the bigger magnetic field also leads to the uprising of two-phase slip ratio that makes the power generation performance be deteriorated.","PeriodicalId":795,"journal":{"name":"Theoretical and Computational Fluid Dynamics","volume":"39 2","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical and Computational Fluid Dynamics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s00162-025-00738-0","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

To efficiently utilize gas driving liquid metal for two-phase magnetohydrodynamic power generatior, a double-nozzle venturi mixer was proposed and the impact of mixer key dimensions, applied magnetic field and load factor on the mixing characteristics and power generation performance were investigated by adopting the VOF (volume of fluid) method in this paper. The results show that the velocity of liquid metal is greatly increased by the high-pressure gas in the mixer and the two-phase churn flow regime with lower two-phase slip ratio and higher uniformity, which represents a better mixing effect, can be found in the mixer with the smaller ratio of nozzle area to gas inlet area (\(S_{\textrm{n}}/S_{\textrm{g}})\) and the larger ratio of mixing chamber area to total inlet area (\(S_{\textrm{m}}/S_{\textrm{i}})\). In the range of this study, the output current, output power, and power generation efficiency of the LMMHD generator reach the maximum as \(S_{\textrm{n}}/S_{\textrm{g}}=0.040\) and \(S_{\textrm{m}}/S_{\textrm{i}}=0.144\). When the magnetic field is small, appropriately increasing it not only enhances the volume fraction of liquid metal in the power generation channel, but also upgrades the two-phase uniformity, which are beneficial to improve the output power \(P_{\textrm{wo}}\) and power generation efficiency \(\eta \). However, the bigger magnetic field also leads to the uprising of two-phase slip ratio that makes the power generation performance be deteriorated.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Theoretical and Computational Fluid Dynamics 物理-力学

CiteScore

5.80

自引率

2.90%

发文量

审稿时长

>12 weeks

期刊介绍： Theoretical and Computational Fluid Dynamics provides a forum for the cross fertilization of ideas, tools and techniques across all disciplines in which fluid flow plays a role. The focus is on aspects of fluid dynamics where theory and computation are used to provide insights and data upon which solid physical understanding is revealed. We seek research papers, invited review articles, brief communications, letters and comments addressing flow phenomena of relevance to aeronautical, geophysical, environmental, material, mechanical and life sciences. Papers of a purely algorithmic, experimental or engineering application nature, and papers without significant new physical insights, are outside the scope of this journal. For computational work, authors are responsible for ensuring that any artifacts of discretization and/or implementation are sufficiently controlled such that the numerical results unambiguously support the conclusions drawn. Where appropriate, and to the extent possible, such papers should either include or reference supporting documentation in the form of verification and validation studies.