The Research And Remodel Design Of Automobile Cooling Fan Blade Based On Reverse Engineering

In the design and manufacture field, any product comes out which contains referenceof existing science and technology. Blade is a key component of cooling and energytransition, its internal fluid conditions directly affect machine performance, therefore,there is an effective measure and important approach based on existing blade technologyto improve and develop blade product performance.Blade with complex space surface, after survey and research on information or dataof blade sectional curve found that there are published very little. So how to quickly andefficiently absorb key technology of blade in actual application, complete highperformance design of blade product is an urgent problem to be solved in many filed.Reverse engineering is an important approach to digest and absorb advanced technology,and the prototype of reproduction is the primary stage, the use of CAD/CAE/CAMtechnology to realize product innovation design is the true purpose and ultimate goal.In this paper, taking car cooling fan as object, duo to exhaust purification, aircondition popularization and weather area reduction of automobile body in recent years,heat loading of engine is increasing gradually, resulting in existing cooling fan can notguarantee much higher cooling work. Through reverse engineering technology to acquirefan digital model, based on momentum-blade element theory to analyse relation betweengeometric parameters and aerodynamics characteristic, utilize CFD method to simulate faninternal fluid, conclusions show that pressure distribution of the blade surface isnonuniform and speed turns out vortex, which not only reduce fan cooling efficiency, butstill increase the engine power consumption. Therefore, it is necessary and feasible toestablish a remodel blade in order to improve automotive cooling fan performance.Through the above research, put forward elliptical curve replace with original bladeprofile curve, then get a remodelled blade curve of standardization. It is not onlyconvenient for manufacturing, but achieving higher cooling efficiency and reducingenergy power consumption of automobile fan, providing a practical reference value forkey parts design and production of ventilation equipment.