@article{201905.0181, doi = {10.20944/preprints201905.0181.v1}, url = {https://doi.org/10.20944/preprints201905.0181.v1}, year = 2019, month = {May}, publisher = {Preprints}, author = {Hengtao Shu and Zhihong Yin and Wenbin Shangguan and Waizuddin Ahmed}, title = {A Study on the Effect of the Outer Ring of Annular Cooling Fan on the Aerodynamic Performance}, journal = {Preprints} }