... e-mail:  mehrdad.raisee.dehkordi@ltu.se e-mail:  michel.cervantes@ltu.se 03 10 2023 11 01 2024 22 03 2024 rotating vortex rope hydraulic turbines swirling flow part load pressure measurement turbine efficiency With the increased share...

... turbine expander, the rotating impeller-induced swirling flow and cavitation are essentially significant and intensive, which requests some in-depth work toward a thorough understanding flow physics and then effective attenuation. This study aims at effectively mitigating the swirling flow and cavitation...

...Suwimon Saneewong Na Ayuttaya; Chainarong Chaktranond; Phadungsak Rattanadecho; Thatchapong Kreewatcharin This study presents a numerical analysis of electric fields distribution, characteristics of swirling flow and effect of inlet velocity (u 0 ) from two ground arrangements, i.e., wire-to-wire...

... numerical analysis pipe flow propulsion swirling flow turbulence underwater vehicles Propulsor design methods utilize CFD to develop initial propulsor configurations and predict the full-scale open-water performance of these optimal designs. However, like all numerical models, these CFD models...

... optimized design was proposed. 23 09 2010 29 03 2011 12 05 2011 12 05 2011 blades computational fluid dynamics design engineering drag electric motors flow simulation Navier-Stokes equations optimisation pipe flow propulsion rotors stators swirling flow underwater...

...-to-total efficiency off-design analysis compressors impellers swirling flow 25 10 2009 09 06 2010 03 09 2010 03 09 2010 2010 American Society of Mechanical Engineers ...

... the final two revolutions. 15 06 2009 19 04 2010 15 06 2010 15 06 2010 blades flow simulation hydraulic systems impellers iterative methods pumps rotational flow swirling flow viscosity Single-blade-impeller pumps are widely used for wastewater pumping...

... 11 06 2010 anemometers boundary layers confined flow swirling flow rotor-stator hot-wire anemometry turbulent flow analytical model In internal gas turbine cooling systems, the disks usually rotate close to a stationary casing or in front of other corotating...

... the late compression. Therefore, it can be assumed that CMCV enhances the fuel-air mixing more than the flame speed. 23 02 2009 11 04 2010 13 05 2010 13 05 2010 confined flow flow control flow measurement internal combustion engines swirling flow turbulence...

... with and without the rotation of the disk, it was found that the normal moment without the disk rotation did not have the effect to encourage the precession motion. Thus, the swirl flow due to disk rotation was found to be responsible for the encouragement of the precession motion. 02 08 2009 07 04 2010...

... hydrodynamics Navier-Stokes equations propulsion rotors stators swirling flow underwater vehicles vehicle dynamics viscosity 2010 American Society of Mechanical Engineers ...

... applications swirling flow turbulence gas-centered coaxial atomizers liquid sheets jet/sheet breakup sprays It has always been the endeavor of all engineers working in spray combustion to transform bulk liquid (fuel and/or oxidizer) into tiny droplets. A decrease in the size of liquid...

...A. Ahmadi The sensitivity to poor conditioned and swirling flow of flow measurements using an orifice plate are subjects of concern to flowmeter users and manufacturers. Measurements of mass flow rate under different conditions and different Reynolds numbers were used to establish a change...

... completely suppresses vortex breakdown while the convex-cone lid precipitates the onset of vortex breakdown. In the above bioreactors, the swirling flow and its vortex breakdown may affect the cell culture in terms of local shear stress and mixing. Dusting et al. ( 17 ) found that the shear stress...

...Shinji Tamano; Motoyuki Itoh; Mitsunori Yoshida; Kazuhiko Yokota In this study, confined swirling flows of an aqueous surfactant solution due to a rotating disk in a cylindrical casing were investigated using a sectional flow visualization technique and a two-component laser Doppler velocimetry...

... scales in the formulation of the eddy viscosity. The filtered k - ω model is implemented in an in-house computational fluid dynamics (CFD) code, and numerical simulations have been made of strongly swirling flow through a sudden expansion. The new model surpasses the original model in predicting unsteady...

.... It is assumed that the cavity volume at the runner exit is a function of the pressure at the vortex core evaluated from the instantaneous local pressure at the runner exit and an additional pressure decrease due to the centrifugal force on the swirling flow. It was found that the diffuser effect of the draft...

... to the later variation or vice versa has been taken to characterize destabilization and relaminarization, respectively. The predicted azimuthal velocity component was found to be reasonably accurate near the wall and not so encouraging in the core region of the swirling flow. The recirculation bubble generated...

...-measured tangential and axial velocity spectra. Although one of them agreed quite well with those in literature, the other was reported for the first time. One explanation was proposed. 11 05 2006 10 04 2007 swirling flow turbulence vortices Cyclone separators have been used...

... 04 04 2007 computational fluid dynamics evolutionary computation hydraulic turbines Navier-Stokes equations radial basis function networks swirling flow surrogate model approximations response surface methodology neural networks Pareto fronts evolutionary algorithms diffuser...