Kun Cheng, Jian Deng, R. Cai, Libo Qian, Peiyao Qi, Bingzheng Ke
{"title":"Study on Natural Circulation Flow Instabilities in Rod Bundle Channel Under Rolling Condition","authors":"Kun Cheng, Jian Deng, R. Cai, Libo Qian, Peiyao Qi, Bingzheng Ke","doi":"10.1115/icone2020-16362","DOIUrl":null,"url":null,"abstract":"\n The effects of rolling condition on the flow instability characteristics of natural circulation (NC) in rod bundle channel were experimentally studied. A 3 × 3 rod bundle channel is used as the testing section. The experimental system pressure range is 0.2 to 0.6 MPa, and the range of inlet subcooling is 10 to 70 °C. The ranges of rolling motion amplitude and period are 10 ∼ 20° and 10 ∼ 30s, respectively. Two typical two-phase flow instabilities in rod bundle channel under rolling condition were found in experiments: (a) the trough-type oscillation caused by the vapor generation at the minimum point of flow fluctuation and (b) the compound oscillation formed by the superposition of the trough-type oscillation and DWOI. Experimental results show that the rolling motion can reduce the threshold heating power of trough-type oscillation and cause the occurrence of NC flow instability in advance. But the rolling motion cannot affect the dimensionless boundary of DWOI in rod bundle channel.","PeriodicalId":414088,"journal":{"name":"Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation","volume":"9 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/icone2020-16362","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The effects of rolling condition on the flow instability characteristics of natural circulation (NC) in rod bundle channel were experimentally studied. A 3 × 3 rod bundle channel is used as the testing section. The experimental system pressure range is 0.2 to 0.6 MPa, and the range of inlet subcooling is 10 to 70 °C. The ranges of rolling motion amplitude and period are 10 ∼ 20° and 10 ∼ 30s, respectively. Two typical two-phase flow instabilities in rod bundle channel under rolling condition were found in experiments: (a) the trough-type oscillation caused by the vapor generation at the minimum point of flow fluctuation and (b) the compound oscillation formed by the superposition of the trough-type oscillation and DWOI. Experimental results show that the rolling motion can reduce the threshold heating power of trough-type oscillation and cause the occurrence of NC flow instability in advance. But the rolling motion cannot affect the dimensionless boundary of DWOI in rod bundle channel.
Heng Xu, Cheng Cheng, Meenakshi Devidas, Deqing Pei, Yiping Fan, Wenjian Yang, Geoff Neale, Paul Scheet, Esteban G Burchard, Dara G Torgerson, Celeste Eng, Michael Dean, Frederico Antillon, Naomi J Winick, Paul L Martin, Cheryl L Willman, Bruce M Camitta, Gregory H Reaman, William L Carroll, Mignon Loh, William E Evans, Ching-Hon Pui, Stephen P Hunger, Mary V Relling, Jun J Yang
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