The Influence of Fin Parameters on the Heat Transfer Characteristics of the End Cover of a Small Rotary Engine
To investigate the relationship between the fin parameters and the heat transfer characteristics of the end cover for a small air-cooled rotary engine.Based on the theory of fluid mechanics and heat transfer,a three-dimensional fluid-solid cou-pling simulation model of the cooling and heat dissipation for the whole machine was established,and numerical simulations were conducted for engines with different fin parameters to study the effects of fin height,length,thickness and fin spacing on the heat transfer capacity and comprehensive performance of the end cover surface.The results show that with the increase of fin height,the heat transfer capacity of the end cover surface first increases and then decreases,but the comprehensive performance evaluation index keeps decreasing.When the fin length is less than 10mm,increasing the fin length appropriately could improve the heat transfer capacity of the end cover surface.In addition,with the increase of fin spacing and fin thickness,the heat dissipa-tion capacity and the comprehensive evaluation index of the end cover surface are continuously improved.This study could provide theoretical support for the end cover fins optimal design of small air-cooled rotor engines.
Small Rotary EngineFluid Structure CouplingFin ParametersNusselt NumberComprehensive Evaluation Factor
NETL
NSTL
万方数据
维普
