原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2015年
6期
1032-1038
,共7页
张文文%丛腾龙%田文喜%秋穗正%苏光辉%谢永诚%蒋兴
張文文%叢騰龍%田文喜%鞦穗正%囌光輝%謝永誠%蔣興
장문문%총등룡%전문희%추수정%소광휘%사영성%장흥
非能动余热排出换热器%自然对流%耦合换热%多孔介质
非能動餘熱排齣換熱器%自然對流%耦閤換熱%多孔介質
비능동여열배출환열기%자연대류%우합환열%다공개질
PRHR-HX%natural convection%coupled heat transfer%porous media
基于多孔介质模型,对AP1000非能动余热排出换热器(PRHR‐HX)运行初始阶段进行了数值模拟。一回路的入口温度及流量采用RELAP5的计算结果,并以此作为CFD计算的边界条件。采用多孔介质模型处理C型管束区,添加管束区分布阻力。通过商业CFD软件FLUENT 计算得到安全壳内置换料水箱(IRWST )侧冷却剂的三维温度及速度分布,通过用户自定义函数 UDF 完成一回路侧与IRWST侧的耦合换热计算,获得一回路温度分布及换热量。计算结果表明,随着IRWST 内冷却剂温度升高,换热器热负荷降低,并出现明显的热分层现象,同时证明采用多孔介质模型与耦合换热计算是分析PRHR/IRWST系统瞬态热工水力特性的有效方法。
基于多孔介質模型,對AP1000非能動餘熱排齣換熱器(PRHR‐HX)運行初始階段進行瞭數值模擬。一迴路的入口溫度及流量採用RELAP5的計算結果,併以此作為CFD計算的邊界條件。採用多孔介質模型處理C型管束區,添加管束區分佈阻力。通過商業CFD軟件FLUENT 計算得到安全殼內置換料水箱(IRWST )側冷卻劑的三維溫度及速度分佈,通過用戶自定義函數 UDF 完成一迴路側與IRWST側的耦閤換熱計算,穫得一迴路溫度分佈及換熱量。計算結果錶明,隨著IRWST 內冷卻劑溫度升高,換熱器熱負荷降低,併齣現明顯的熱分層現象,同時證明採用多孔介質模型與耦閤換熱計算是分析PRHR/IRWST繫統瞬態熱工水力特性的有效方法。
기우다공개질모형,대AP1000비능동여열배출환열기(PRHR‐HX)운행초시계단진행료수치모의。일회로적입구온도급류량채용RELAP5적계산결과,병이차작위CFD계산적변계조건。채용다공개질모형처리C형관속구,첨가관속구분포조력。통과상업CFD연건FLUENT 계산득도안전각내치환료수상(IRWST )측냉각제적삼유온도급속도분포,통과용호자정의함수 UDF 완성일회로측여IRWST측적우합환열계산,획득일회로온도분포급환열량。계산결과표명,수착IRWST 내냉각제온도승고,환열기열부하강저,병출현명현적열분층현상,동시증명채용다공개질모형여우합환열계산시분석PRHR/IRWST계통순태열공수력특성적유효방법。
Thermal‐hydraulics characteristics of AP1000 passive residual heat removal heat exchanger (PRHR‐HX) at initial operating stage were analyzed based on the por‐ous media model .The data obtained from RELAP5 under the condition of the station blackout was employed as the inlet flow rate and temperature boundary of CFD calcula‐tion .The distribution resistances were added into the C‐type tube bundle region which was treated as porous zone .Three‐dimensional distributions of velocity and temperature in the in‐containment refueling water storage tank (IRWST ) were calculated by the commercial CFD code FLUENT .The heat transfer between the primary loop side and the IRWST side was calculated by user self‐defined function UDF .The results show that the heat transfer capability decreases with the increase of water temperature and a thermal stratification phenomenon in the tank occurs .The present results indicate that the method containing coupled heat transfer from the primary loop side fluid to IRWST side fluid and porous media model is a suitable approach to study the transient thermal‐hydraulics of PRHR/IRWST system .