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Project supported by the Key Science Foundation of Ministry of Education of China (Grant No. 2008108111);the National Basic Research Program of China (973 Program, Grant No. 2007CB714105);the Program of New Century Excellent Talents in University (Grant No. NCET-08-0378)
Air entrainment is known to be one of efficient and inexpensive methods to prevent cavitation damages in hydropower projects.The shape of sudden expansion-fall is used as a common device for mitigating cavitation eros...