Acknowledgments
This work was supported by the National Natural Science Research Foundation of China (2014BAG09B01).
Authorship: LG Tan is the first author of the study. We thank YZ Chen and C. Yang for assistance in collecting actual operation data of fan blades. N. He and ZW Li designed the experiments; N. He and ZW Li performed the experiments; LG Tan crunched the experimental data; LG Tan and N. He contributed in the components of the prediction model. N. He wrote the paper; LG Tan and T. Pang commented on the manuscript.