Experimental Measurement for the Validation of CFD for flows in Confined Geometries of Relevance to Liquid Metal Reactors

这个项目是利物浦大学工程学院和国家核实验室之间的EPSRC iCASE学生项目。该项目主要是实验性的，涉及使用激光多普勒测速仪(LDV)测量复杂几何形状的流体流动，以便为预测CFD模型的开发提供信息。该项目的重点有两个方面：(1)利用利物浦大学的方形管道装置研究所谓的Couette-Poiseuille流动，特别是层流到湍流的过渡流动。在这种流动中，方形管道中的压力驱动流与移动壁部件相结合，利物浦大学为其建造了一台实验台。这是一种以前没有通过实验观察到的流动，只有数值分析，所以这项研究有可能增加对基本流动现象的理解。(2)在此基础上，对NNL位于NNL Workington的创新退役中心(CINDE)的新燃料组件测试部分--项目FICESS内的流场进行了研究。在这台试验台上，激光测速技术被用来测量全湍流中的流速。

This Project is an EPSRC iCASE studentship between the School of Engineering at the University of Liverpool and the National Nuclear Laboratory. The project is primarily experimental and involves using Laser Doppler Velocimetry (LDV) to measure fluid flow in complex geometries in order to inform the development of predictive CFD models. The focus of the project is twofold: (1) investigating so-called Couette-Poiseuille flow using a square duct rig at The University of Liverpool with a special interest in the laminar to turbulent transitional flow. In this flow, pressure driven flow in a square duct is combined with a moving wall component, an experimental rig for which has been constructed at the University of Liverpool. This is a flow that has not before been experimentally observed, only numerically analysed, so this research has the prospect of increasing understanding of fundamental flow phenomena. (2) Alongside this, the flow field within NNL's new fuel assembly test section, Project FAITH, which is situated in the Centre for Innovative Decommissioning (CINDe) at NNL Workington is probed. In this rig, LDV techniques have been used to measure flow velocities in fully-turbulent flow.