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Structure analysis and optimization of the axial-flow fan based on fluid-structure interaction

LUO Li;WANG Qi;YUAN Mingxin;JIN Qichun;GAO Jinke;Suzhou Institute of Technology,Jiangsu University of Science and Technology;  
In order to solve the problem of the small outlet flow rate and the low efficiency of an axial-flow fan,a numerical simulation model to compute airflow field is set up according to the theory of computational fluid dynamics and software Fluent; the error of numerical simulation and experimental results is 4. 3%,and the reliability of the model is validated,which provides a basis for optimizing. The numerical simulation results show that the structure of the axial fan and guide vane are unreasonable,the airflow trajectory is in disorder and the route loss is great,which affects the performance of the axial-flow fan. By optimizing the parameters of the fan and redesigning the upright guide vanes twisted spatial type,and match up the axial-fan with orthogonal test analysis,the airflow trajectory is ordered,the outlet flow rate is increased from 0. 167 7 kg/s to 0. 192 8 kg/s,the efficiency is increased from 33. 2% to 51. 7%. At last,the stress and displacement is carried out for the axial fan in rotating work based on fluid-structure interaction,the result shows that the strength of the axial fan meets the requirements.
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