Effect of the Arrangement of a New-Type of Turbulator Inserts on Heat Pipe Exchanger Performances  

作　　者：Ibtisam A.Hasan Wafa Maki 

机构地区：[1]Department of Electromechanical Engineering,The University of Technology,Baghdad,Iraq

出　　处：《Fluid Dynamics & Materials Processing》2023年第10期2749-2759,共11页流体力学与材料加工（英文）

摘　　要：This research tests the effect of introducing turbulators of a new type into a circular tube heat exchanger under a constant and uniform longitudinal heatflux condition.A 45 mm diameter copper tube with a length of 1,350 mm is utilized with a solid disk being inserted inside the tube,which consists of three sections,each one containing two slots.The slot is cut at a 45 degree angle toward the inner tube surface,which results in diverging theflow toward the inner hot tube surface in order to enhance the heat transfer process.Air is considered as the workingfluid with Prandtl number 0.71.The Reynolds number spans the interval from 6,000–13,500,which indicates that the consideredflow is turbulent.The heat exchanger performance is studied and analyzed in terms of average Nusselt number.The experimental results show that the Nusselt number value is directly proportional to the increase of the Reynolds number,and the number of turbulators inserts.With the use of three novel turbulators,the heat transfer was about 3.15 times higher than that in the smooth tube and the friction factor was about 1.11.

关 键 词：Heat pipe exchanger heat transfer inserts(NT inserts) turbulators(novel turbulators) disk(solid disk) 

分 类 号：TK172[动力工程及工程热物理—热能工程]