套筒式热风炉流场及温度场数值模拟

东北大学硕士论文AbstractSleeve type hotair stove flowfieldandtemperature field simulationAbstractSleeve type hot air stove because its compact structure,high thermal efficiency,andwide applicable scope,is used in a wide range of applications.in daily life and production.But sleeve type hot air stove existence a low heat transfer coefficient between smoke and air,furnace materials appear high temperature oxidation peel,even burning through and ashproblems.This article try to give a numerical simulation and emulation to furnace body.Find outthe key part of problematic,and puts forward Suggestions for improvement.This paper usePRO/E bulid the entity modeling of heat exchange body,Based on the operating conditionsand primary part of the stove,simplified the entity model.Using the workbench mesh modulemeshing on the entity model.Using fluent simulate the gas and air flow and temperature fieldin stove.Get temperature distributionthe of heat exchange body in stove.During the process of the flow field analyse,the numerical modeling of the fluid controlequation have been bulided.The vortex of smoke in the cylinder is one of main causes of theexchange tube viberation.In the process of temperature field analysis,base on the influenceof fin toward thermal efficiency buliding the numerical modeling,Through numericalmodeling got the critical point of fin increase the thermal efficiency.During the process of the temperature field analyse,the numerical modeling of theradiation of the heat exchange body have been bulided,the method increased radiation heattransfer is to increase the blackness of the cavities of stove.During the process of heattransfer in the stove,most of the heat transfer is decided by the bottom laminar,through theanalysis,when the wall rough convex point larger than the average height of bottom laminar,fluid will over the convex point and pour to the sunken place forming vortex.So can improvethe convective heat transfer.So it will play a guiding role during design the height of the finof stove.Can through calculate the thickness of bottom laminar to design the minimum heightof the fin,So as to improve the thermal efficiency of the stove ,provide basis for improvingthe design of body structure.