Research Center for Engineering of
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Title: Unsteady pressure measurements and numerical investigation of the jet control method in a conical diffuser with swirling flow
Published In: 25th IAHR Symposium on Hydraulic Machinery and Systems, IOP Conf. Series: Earth and Environmental Science 12 012017, Timisoara, Romania
Description: The jet control method is experimentally investigated in order to mitigate the vortex rope and its associated pressure fluctuations. The unsteady pressure is recorded in 8 transducers flush mounted on the wall of the test section at different values of the jet discharge. The amplitude and frequency of the vortex rope is obtained based on unsteady pressure measurements using Fourier analysis. The 3D computational domain corresponds to the test rig section. The three-dimensional full unsteady turbulent computation is performed with jet control for different values of discharge. In numerical simulation, the unsteady pressures are obtained on the cone wall at the same positions as those in experimental investigation. Consequently, the amplitude and frequency of the vortex rope are computed and validated with experimental data. As a result, the amplitude and frequency are diminished if the water jet discharge is increased.
DOI:DOI: 10.1088/1755-1315/12/1/012017
Publication year: 2010
Keywords:Unsteady pressure measurements, swirling flow with vortex rope, water jet method
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Authors: BOSIOC Ilie Alin , TANASA Constantin , MUNTEAN Sebastian , SUSAN-RESIGA Romeo ,
Type: International Conference Proceedings
Laboratory: Numerical Simulation and Parallel Computing Laboratory
Institution: UPT