棒束内超临界水流动阻力特性试验研究  

Experimental Research on Flow Resistance Characteristics of Supercritical Water in a Rod Bundle

作　　者：吴刚[1,2] Wu Gang(College of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;Shaanxi Key Laboratory of Advanced Simulation Technology for Oil&Gas Reservoirs,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]西安石油大学石油工程学院,西安710065 [2]西安石油大学陕西省油气田特种增产技术重点实验室,西安710065

出　　处：《发电设备》2022年第4期223-228,共6页Power Equipment

摘　　要：在压力为23~25 MPa、质量流速为350~700 kg/(m^(2)·s)、热流密度为200~600 kW/m^(2)的条件下,对超临界水冷堆燃料组件模拟件内超临界水的流动阻力特性进行了试验研究,得到了超临界水的摩擦压降和摩擦阻力系数的变化规律。结果表明:在给定的压力、质量流速和热流密度工况下,随着流体温度的升高,其摩擦阻力系数先增大后减小,在拟临界温度之前出现峰值,呈现Λ形分布。摩擦阻力系数随质量流速的增加而明显减小,但是对压力和热流密度的变化不敏感。流体热物性的变化对摩擦阻力系数影响较大,基于常物性流体的摩擦阻力系数公式难以准确预测2×2棒束内超临界水的流动阻力特性。An experiment was carried out to study the flow resistance characteristics of supercritical water in a fuel assembly simulator of supercritical water-cooled reactor.The experimental parameters covered the pressure of 23-25 MPa,mass flux of 350-700 kg/(m^(2)·s)and heat flux density of 200-600 kW/m^(2).The variation laws of friction pressure drop and friction resistance coefficient of supercritical water were obtained.The results show that under the given conditions of pressure,mass flux and heat flux density,with the increase of fluid temperature,the friction resistance coefficient first increases and then decreases,and there is a peak before the pseudo-critical temperature,showing a Λ-shaped distribution.The friction resistance coefficient decreases obviously with the increase of mass flux,but it is insensitive to the changes of pressure and heat flux density.The variation of the thermophysical properties has a great impact on the friction resistance coefficient,and the friction resistance coefficient empirical correlations based on constant-property fluid is difficult to accurately predict the flow resistance characteristics of supercritical water in the 2×2 rod bundle.

关 键 词：超临界水 流动阻力特性 摩擦阻力系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]