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3D numerical simulation of unsteady pressure fluctuations in a swirling flow without and with axial water jet control
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The 14th International Conference on Fluid Flow Technologies. Budapest, Hungary: CD-ROM
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The paper presents our numerical investigations
of the axial jet control technique for swirling flows
in a straight draft tube in order to mitigate the
precessing vortex rope and its associated pressure
fluctuations. The 3D unsteady and full turbulent
numerical simulations are performed in order to
compute the flow field without and with axial jet
control. Using the unsteady pressure recorded the
Fourier spectra are obtained. As a result, the vortex
rope frequency decreases while the jet discharge
increases. Moreover, 10% jet discharge is required
in order to operate without pressure fluctuations.
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2009
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| Axial water jet control, swirling flow, 3D numerical analysis, unsteady pressure fluctuations, straight draft tube |
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Paper
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MUNTEAN Sebastian
,
SUSAN-RESIGA Romeo
,
BOSIOC Ilie Alin
,
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International Conference Proceedings
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Numerical Simulation and Parallel Computing Laboratory
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| Institution: |
UPT
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