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Markus Hundshagen, Kevin Rave, Michael Mansour, Dominique Thévenin and Romuald Skoda
A hybrid two-phase flow solver is proposed, based on an Euler?Euler two-fluid model with continuous blending of a Volume-of-Fluid method when phase interfaces of coherent gas pockets are to be resolved. In a preceding study on a two-dimensional bladed re...
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Simon Joßberger and Stefan Riedelbauch
Double-regulated Kaplan turbines with adjustable guide vanes and runner blades offer a high degree of flexibility and good efficiency for a wide range of operating points. However, this also leads to a complex geometry and flow guidance with, for example...
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Wenjie Kong, Hao Dong, Jie Wu, Yidi Zhao and Zhou Jin
Porous media has potential applications in fluid machinery and in aerospace science and engineering due to its excellent drag-reduction properties. We carried out experimental time-resolved particle image velocimetry (TR-PIV) research, laying porous medi...
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Julian Kimmerl and Moustafa Abdel-Maksoud
Underwater radiated noise is part of the anthropogenic emissions into the environment and as such a pressing problem for the preservation of the marine ecosystem. In order to direct attention to the most relevant noise sources associated with ships it is...
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Joshua D. Blake, Adrian Sescu, David Thompson and Yuji Hattori
Large-eddy simulation (LES)-based jet noise predictions do not resolve the entire broadband noise spectra, often under-predicting high frequencies that correspond to un-resolved small-scale turbulence. The coupled LES-synthetic turbulence (CLST) model is...
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Julian Kimmerl, Paul Mertes and Moustafa Abdel-Maksoud
Methods to predict underwater acoustics are gaining increased significance, as the propulsion industry is required to confirm noise spectrum limits, for instance in compliance with classification society rules. Propeller?ship interaction is a main contri...
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Mahdi Abkar
A large-eddy simulation (LES) study of vertical-axis wind turbine wakes under uniform inflow conditions is performed. Emphasis is placed on exploring the effects of subgrid-scale (SGS) modeling on turbine loading as well as on the formation and developme...
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Ji-Tao Qiu, Chen-Jun Yang, Xiao-Qian Dong, Zong-Long Wang, Wei Li and Francis Noblesse
Unsteady Reynolds-averaged Navier?Stokes simulations of an axial-flow pump for waterjet propulsion are carried out at model scale, and the numerical uncertainties are analyzed mainly according to the procedure recommended by the twenty-eighth Internation...
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Yuncheng Xu, Xiaofeng Liu
Pág. 1 - 21
In-streamstructurescontributegreatlytothebiodiversityinstreamsandplayanimportant role in restoring and protecting rivers. They usually have complex geometries. To evaluate their impact and effectiveness, computational models are increasingly used. Howeve...
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