CAJ | 학술논문

为了解核电汽轮机湿蒸汽对中压进汽蝶阀的气动力矩的影响，利用FLUENT中Mixture多相流模型对AP1000核电汽轮机中调门的气动力矩进行汽水两相流数值模拟，分别对中调门不同开度下湿蒸汽汽水两相流和蒸汽单相流气动力矩的模拟结果进行比较分析。结果表明：中调门开启过程中，气动力矩先逐渐增大，最大值发生于中调门40°开度时，中调门开度继续增大，气动力矩逐渐减小。湿蒸汽汽水两相流对中调门的气动力矩为蒸汽单相流的两倍之多，增加了阀门发生卡涩故障的风险。
위료해핵전기륜궤습증기대중압진기접벌적기동력구적영향，이용FLUENT중Mixture다상류모형대AP1000핵전기륜궤중조문적기동력구진행기수량상류수치모의，분별대중조문불동개도하습증기기수량상류화증기단상류기동력구적모의결과진행비교분석。결과표명：중조문개계과정중，기동력구선축점증대，최대치발생우중조문40°개도시，중조문개도계속증대，기동력구축점감소。습증기기수량상류대중조문적기동력구위증기단상류적량배지다，증가료벌문발생잡삽고장적풍험。
To understand how wet steam in nuclear power steam turbine affects the pneumatic torque of medium?pressure butterfly valve, the mixture multiphase flow model in FLUNET was first used to make numerical simulation for wet steam’ s two phase flow. The simulation is about the pneumatic torque of mid?pressure control valve in AP1000 nuclear power steam turbine. And then the pneumatic torque’ s simulation results of wet steam’ s two?phase flow and single phase flow were compared under valve’ s different openings. The results show that the pneu?matic torque increases gradually until the maximum occurs in valve’ s 40 ° opening and that with the valve’ s open?ing getting bigger than 40° the pneumatic torque gradually decreases. The aerodynamic torque decreases when the valve’s opening continues to increase. The pneumatic torque of the wet steam’s two phase flow is more than double that of steam single?phase flow, thus increasing the risk of valve’ s jam fault.