Research Center for Engineering of
                Systems with Complex Fluids
Title: 3D numerical simulation of unsteady pressure fluctuations in a swirling flow without and with axial water jet control
Published In: The 14th International Conference on Fluid Flow Technologies. Budapest, Hungary: CD-ROM
Description: 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.
Publication year: 2009
Keywords:Axial water jet control, swirling flow, 3D numerical analysis, unsteady pressure fluctuations, straight draft tube
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Authors: MUNTEAN Sebastian , SUSAN-RESIGA Romeo , BOSIOC Ilie Alin ,
Type: International Conference Proceedings
Laboratory: Numerical Simulation and Parallel Computing Laboratory
Institution: UPT