1. Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University , Yichang 443002, China ; , Yichang 443002, China
2. College of Mechanical & Power Engineering, China Three Gorges University , Yichang 443002, China ; , Yichang 443002, China
3. College of Mechanical & Power Engineering, China Three Gorges University , Yichang 443002, China