Influences of twisted turbulators arrangements on heat transfer and airflow resistance over absorber plate of solar air heater
M. Khoshvaght-Aliabadi, I. Rahmani, Javad Abolfazli Esfahani
Abstract
This study prepares an experimental examination of thermal and hydraulic analysis of an absorber plate integrated with different arrangements of twisted turbulators, including longitudinal, transversal, and oblique orientations. These arrangements are considered for both the integral and the interrupted turbulators over Reynolds number range from 9174 to 55048. Nu ratio and f ratio range from 1.15–2.21 and 1.73–7.79, respectively. The interrupted turbulators with oblique arrangements with the attach angles of 30° and 60° come in the second and third places, respectively, and the maximum criterion value in the latter cases is 1.29 and 1.21.
Topics & Concepts
TurbulatorMaterials scienceAirflowMechanicsHeat transferHeat transfer enhancementReynolds numberRange (aeronautics)OpticsThermodynamicsComposite materialTurbulenceHeat transfer coefficientPhysicsHeat Transfer MechanismsFluid Dynamics and Turbulent FlowsAerodynamics and Fluid Dynamics Research