基于氦气置换的超大型土工离心机缩比模型温控实验研究  

Experimental study on temperature control of scaled model of ultra-large geotechnical centrifuge based on helium replacement

作　　者：郑传祥[1] 戴煜宸 魏双 颜加明 黄维 ZHENG Chuanxiang;DAI Yuchen;WEI Shuang;YAN Jiaming;HUANG Wei(College of Energy Engineering,Zhejiang University,Hangzhou 310058,China;Hangzhou Chinen Steam Turbine Power Limited Company,Hangzhou 310018,China;Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China)

机构地区：[1]浙江大学能源工程学院,浙江杭州310058 [2]杭州中能透平机械装备股份有限公司,浙江杭州310018 [3]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《浙江大学学报（工学版）》2024年第10期2096-2103,共8页Journal of Zhejiang University：Engineering Science

基　　金：国家重大科技基础设施资助项目(2017-000052-73-01-002083).

摘　　要：为了解决常压下超重力离心模拟与实验装置(CHIEF)的温控问题,提出以氦气置换机室内空气的温控方法,建立区分不同热源的传热模型,通过降低风阻功率减少源头热量产生.建造CHIEF的缩比模型实验装置(机室直径缩比为1∶20),分别在空气和氦气介质下测定风阻功率和机室内的温度.实验结果表明,氦气置换空气后,风阻功率降低了82.4%,机室内的最高温度从56.4℃降至32.9℃,机室内的最大温差从6.8℃降至4.1℃.传热模型的分析结果表明,气体与机室侧壁面的摩擦产热是造成机室温度升高的主要原因,氦气置换后的原型机机室温度可控制在25.7℃,实现了机室最高温度不超过(40±5)℃的温控目标.A temperature control method was proposed using helium to replace the air in the machine room,and a heat transfer model for distinguishing different heat sources was established to address the temperature control issue of the centrifugal hypergravity and interdisciplinary experiment facility(CHIEF)under normal pressure.By reducing the windage power,the heat generation was reduced from the source.A scaled model experiment facility of the CHIEF was constructed(the diameter reduction ratio of the machine room is 1∶20),the windage power and the machine room temperature under air or helium medium were measured respectively.Experimental results showed that with the helium replacement of air,the windage power dropped by 82.4%,and the highest temperature in the machine room decreased from 56.4℃to 32.9℃,while the maximum temperature difference decreased from 6.8℃to 4.1℃.Analysis results of the heat transfer model indicated that the friction between the air and the sidewall was the chief cause of the temperature rise in the machine room,and the temperature of the machine room was controlled at 25.7℃in the case of helium replacement,achieving the temperature control target of the maximum temperature in the machine room not exceeding(40±5)℃.

关 键 词：超重力离心模拟与实验装置(CHIEF) 土工离心机 温控 风阻功率 氦气置换 

分 类 号：TH3[机械工程—机械制造及自动化]