金属丝网强化余热回收烟气换热器的试验与数值研究OA北大核心CSTPCD

In order to explore the feasibility and performance of metal wire mesh reinforcement elements in waste heat recovery exhaust heat exchangers,experimental and numerical studies on the flow and heat transfer performance of channels embedded with metal wire mesh were conducted.Experimental research was conducted on channels embedded with metal wire mesh with different porosities.Simulation calculations and flow field analysis were conducted based on FLUENT,and the influence of wire mesh height on flow and heat transfer performance was analyzed.The results show that compared to traditional flat fins,the comprehensive performance index of the channel after embedding the metal wire mesh is improved by a maximum of 58% .The comprehensive performance first increases and then decreases with the increase of porosity,with 0.945 being the optimal porosity.At the same time,using a metal wire mesh that is consistent with the height of the flow channel can achieve the best comprehensive performance.Under the same pressure loss,the metal wire mesh can achieve better comprehensive performance by uniform fluid temperature and breaking the boundary layer compared to flat fins by increasing heat transfer area,which proves the feasibility of using the metal wire mesh as a strengthening element for exhaust heat exchangers.