Research On Fluid Mixing And Heat Transfer Of Vortex Generator To Single Side Heated Rectangular Channel

vortex generators have received a lot of attention from experts and researchers because of their easy installation and good thermal performa nce.The introduction of vortex generators on the air-side surface can improve the heat exchanger performance.The mechanism is that vortex generators change the flow structure by inducing the generation of transverse vortices,leading to a significant increase in fluid mixing;at the same time,they generate longitudinal vortices to disturb the development of the boundary layer,increase the turbulence intensity,and generate secondary flows on the heat exchanger surface,breaking the fluid velocity bounda ry layer and thermal boundary layer,thus improving the heat transfer rate.In this paper,numerical simulation methods are used to study the influence of longitudinal wing vortex generators on flow heat transfer in rectangular channels: for different types of wing vortex generators,their effects on heat transfer,flow resistance performance,vortex structure,temperature distribution,and turbulent kinetic energy are compared in the flow process,and the effect of wing vortex generator type on the effect of various parameters is derived while The effect of the type of wing vortex generator on the effect of various parameters,coupled with the analysis of various flow heat transfer parameters,is obtained under different flow conditions of the best heat tra nsfer performance of the wing vortex generator.In-depth analysis is carried out for the oblique elliptical wing vortex generator to study the mechanism of its effect on heat transfer,flow resistance and comprehensive influence,and to study the flow heat transfer characteristics of the oblique elliptical vortex generator under different head-on angle of attack and inlet Reynolds number from various aspects such as vortex structure,temperature distribution and turbulent kinetic energy,etc.The optimal he ad-on angle of attack under different Reynolds number conditions is derived and its reasons are analyzed.The combination of the pit structure and the wing vortex generator is analyzed to have better overall heat transfer performance.The combined structure is optimized parametrically based on the ANSYS Workbench direct optimization module,and the ASO direct optimization method is applied to find the best combined structure and perform the flow heat transfer analysis.