轴流风机扇叶的仿真与分析

AbstractABSTRACTIn comparison with common centrifugal fanner,axial-flow fanner has a bigger fluxand lower lift.It plays a large role in motor field due to its simple structure andconvenient management.The study on the inner flow field of the axial-flow fanner willprovide reliable evidences to the fanner's air dynamic performance and to theoptimization of the flow-passed parts.The effective method to improve the fanner'sperformance also has deep significance for the development of country economics.Aiming to above problem,this paper makes use of 3D numerical simulation oninner flow field in axial-flow fanner by CFD method to obtain the flow velocity vectorand pressure distribution and,basing on the analysis of the flow field of the fan lamina,then proceed some exploring studies for improving the performance of the fanner.In theexploring studies,we adopt global-local analysis method on flow field.After primaryensure the affections of fanner's parts to the flow field and fanner's performance,weemphasis on the key part-fan lamina-to detail analysis.The main contents include:1.Study the flow field detailly under the real wind tunnel experimental conditionduring which,with combination of fanner experimental methods,we select appropriateboundary condition close to experimental status;2.Study the affections of fanner's parts to the flow field and fanner's performanceand result that the fan lamina is the main factor;3.Study the flow field of QS1304 fan lamina of our Corporation under theexperimental status,thus,provide an improved scheme and,simultaneously,carries outthe computation and comparative analysis between the fan's experimental specialitiesand simulated specialities;4.From the wind experiments of the pre-(original)fan lamina and post-(improved)fan lamina,the comparison between the experimental data and simulated computationalresults verifies the validity andfeasibility of the numerical simulation method in thepaper.Basing on the analysis results,we propose some suggestions to the future fanlamina design.