Results 1 to 10 of about 11,397 (207)
Comparative Study of Coaxial Main Rotor Aerodynamics at Forward Flight Based on Free Wake Model and Unsteady ReynoldsAveraged Navier–Stokes Method [PDF]
Journal of Aerospace Technology and Management, 2022 This paper is dedicated to the numerical modeling of the aerodynamic characteristics of the full-scale coaxial main rotor. The modes of forward flight in the range of values V = 30−60 m∙s–1 (108−216 km∙h–1) have been under consideration.
Sergey Gennadievich Konstantinov +4 more
doaj +3 more sources
International Journal of Naval Architecture and Ocean Engineering, 2017 The KVLCC2 and its modified hull form were investigated in regular head waves using Unsteady Reynolds Averaged Navier–Stokes (URANS) methods. The modified KVLCC2 (named KWP-bow KVLCC2) is designed for reducing wave reflection from the bow.
Kwang−Soo Kim, Il-Ryong Park
exaly +3 more sources
CFD Investigation of a High Head Francis Turbine at Speed No-Load Using Advanced URANS Models
Applied Sciences (Switzerland), 2018 Due to the integration of new renewable energies, the electrical grid undergoes instabilities. Hydroelectric power plants are key players for grid control thanks to pumped storage power plants.
Jean Decaix +2 more
exaly +3 more sources
Evaluation of CFD URANS Turbulence Models for the Building under Environmental Wind Flow with Experimental Validation [PDF]
Journal of Applied Fluid Mechanics, 2022 Wind flow on and around buildings attains more importance among architectures, builders, urban planners, structural engineers, and wind engineers. Wind tunnel experiments and wind flow assessments of full-scale buildings are expensive and complex in ...
K. B. Rajasekarababu +2 more
doaj +1 more source
Aerodynamic Performance Investigations of Savonius Twin-rotor Wind Turbines [PDF]
Journal of Applied Fluid Mechanics, 2023 The aim of this study is to evaluate the aerodynamic efficiency of a Savonius vertical-axis wind turbine. The approach used relies on resolving the Unsteady Reynolds Averaged Navier-Stokes equations (URANS), the turbulence being modeled by the k-ω SST ...
M. Tata +8 more
doaj +1 more source
Comparative Study of Coaxial Main Rotor Aerodynamics in the Hover with the Usage of Two Methods of Computational Fluid Dynamics [PDF]
Journal of Aerospace Technology and Management, 2021 The paper is focused on numerical modeling of the aerodynamic characteristics of a full-scale coaxial main rotor in hover. The simulation was performed using two approaches of computational fluid dynamics (CFD): the original free wake model (FWM ...
Sergey Gennadievich Konstantinov +3 more
doaj +3 more sources
CFD modelling of a pulsed jet formed during an idealized isolated cough [PDF]
E3S Web of Conferences, 2022 The current contribution presents the results of calculations of a pulsed jet formation during a single cough based on the recent test by Fabregat et al. (2021) where the DNS of an idealized isolated cough was performed.
Zasimova Marina +2 more
doaj +1 more source
Otopro, 2021 The numerical study of pressure drop on a tandem cylinder with the addition of a splitter plate and a vortex generator with the effect of a blockage ratio has been completed.
Diastian Vinaya Wijanarko
doaj +1 more source
Energies, 2020 Close-packed contra-rotating vertical-axis turbines have potential advantages in wind and hydrokinetic power generation. This paper describes the development of a numerical model of a vertical axis turbine with a torque-controlled system using an ...
Ruiwen Zhao +4 more
doaj +1 more source
Journal of Turbulence, 2023 Since the 1990s, RANS practitioners have observed spontaneous unsteadiness in RANS simulations. Some have suggested deliberately using this as a method of resolving large turbulent structures. However, to date, no one has produced a theoretical justification for this unsteady RANS (URANS) approach.
openaire +2 more sources