In the meantime, the helicalvortex rope in draft tube is analyzed by t...
本文还根据计算结果分析了尾水管内非定常涡带产生和传播的原理。
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The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helicalvortex rope with the dead core.
For Francis turbines, the pressure pulsation in draft-tubes induced by helicalvortex rope is one of the main problems and it would seriously affect the safe operation of the unit.