3×3棒束间湍流流动的3D激光多普勒方法实验研究  

3D Laser Doppler Measurement on Turbulent Flows in a 3×3 Rod Bundle

作　　者：俞洋[1] 熊进标[1] 程旭[1] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240

出　　处：《核动力工程》2015年第3期142-144,共3页Nuclear Power Engineering

摘　　要：子通道或者子通道间的流动搅混显著影响热传递性能。采用5光束3D激光多普勒测速(LDV)系统对3×3棒束间的流动速度进行测量。棒束组件带有简单的定位格架,格架中没有安装搅混装置。棒束的直径与棒间距根据真实燃料组件确定。测量区域选择在近出口段的位置,此位置距离定位格架较远,流动已是充分发展。测量窗口选择在侧边。采用2D LDV测量了1/4的子通道截面,试验记录了测试区域中的主流速度和湍流强度。Turbulent flows in a rod bundle are important field for the nuclear reactor fuel assembly since the flow mixing in a sub-channel or between sub-channels can significantly modify the heat transfer performance. A five beam three dimension Laser Doppler Velocimetry （ LDV ） system is applied to measure the flow velocities in a 3×3 rod bundle installed with the simple grid spacers and without mixing vanes. The rod diameter and spacing between rods are set according to the typical fuel assembly. The area to be measured is near the outlet of the bundle, and it is far from the space grid, so it can be treated as the developed flow condition. 2D LDV is used to measure one quart of the flow cross-section, and the main velocity and main turbulence intensity have been recorded.

关 键 词：激光多普勒测速(LDV) 3×3棒束 流动测量 湍流强度 

分 类 号：TL334[核科学技术—核技术及应用] O359.1[理学—流体力学]