Numerical Simulation of Traveling Bubble Cavitating Flow in a Francis Turbine

Lingjiu Zhou () and Zhengwei Wang ()
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Lingjiu Zhou: China Agricultural University, College of Water Conservancy and Civil Engineering
Zhengwei Wang: Tsinghua University, Department of Thermal Engineering

A chapter in Computational Mechanics, 2007, pp 262-262 from Springer

Abstract: Abstract The 3-D unsteady Reynolds averaged Navier-tokes equations based on the pseudo-homogeneous flow theory and a vapor fraction transport-equation that accounts for non-condensable gas are solved to simulate cavitating flow in a Francis turbine. The calculation results agreed with experiment data reasonably. With the decrease of the Thoma number, the cavity first appears near the centre of the hub. At this stage the flow rate and the efficiency change little. Then the cavity near the centre of the hub grows thick and the cavities also appear on the blade suction side near outlet. The flow rate and efficiency then decrease rapidly with further reduce of the Thoma number.

Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-75999-7_62

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DOI: 10.1007/978-3-540-75999-7_62

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