FLOW REGIMES BELOW AERATORS FOR DISCHARGE TUNNELS |
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| Authors: | MA Fei WU Jian-hua |
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| Institution: | MA Fei, WU Jian-hua College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China, |
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| Abstract: | The flow regimes below an aerator influence directly the air entrainment and the cavitation damage control. Based on the theoretical considerations, the experiments of the aerator for a discharge tunnel were conducted, and the relationships between the flow regime and hydraulic and geometric parameters were investigated. The results showed that, there are two kinds of threshold values for the flow regime conversions. One is1-2Fr standing for the conversion from the fully filled cavity to the partially filledcavity, and the other is2-3Fr which shows the change from the partially filled cavity to the net air cavity. Two empirical expressions were obtained for the conversions of the flow regimes, which can be used in the designs of the aerators. |
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| Keywords: | aerator discharge tunnel flow regime filling water jet length |
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