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요약정보
混流式水轮机内部流场模拟分析
Resource Type
Academic Journal
Authors
冯赵展
;
于凤荣
;
徐瑞红
Source
中国水运(下半月) / China Water Transport
. 22(2):48-50
Subject
混流式水轮机;数值模拟;空化;尾水管
Language
Chinese
ISSN
1006-7973
Online Access
Full Text (CAJ - 경제/경영)
초록
为了研究混流式水轮机内部流态,本文以HLA855A-LJ-250型号水轮机为研究对象,基于SST k-ω湍流模型对水轮机全流道进行了三维空化流场数值模拟,研究水轮机在最大水头、最小水头和额定水头下三种不同工况下水轮机内部流动特性.结果表明:在最大水头工况下转轮泄水锥及叶片受空蚀破坏严重,尾水管内部出现旋涡回流,影响机组稳定运行;最小水头工况下转轮叶片上出现小面积空蚀,尾水管内部流场较为规律,对机组稳定运行不构成安全运行威胁;额定水头工况下水轮机内部过流部件没有出现空蚀破坏,尾水管内部流场分布规律与最小水头工况相似但更为稳定.
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