Results 21 to 30 of about 56,552 (191)

Directivity of blade-tower interaction noise [PDF]

open access: yesJASA Express Letters, 2021
This paper presents a combined experimental and numerical study that characterises the directivity of blade-tower interaction (BTI) noise. Numerical computations were performed using a hybrid approach combining unsteady Reynolds-averaged Navier-Stokes ...
Yendrew Yauwenas   +4 more
doaj   +1 more source

Numerical Modeling of Tsunami Waves Interaction with Porous and Impermeable Vertical Barriers

open access: yesJournal of Applied Mathematics, 2012
Tsunami wave interaction with coastal regions is responsible for very important human and economic losses. In order to properly design coastal defenses against these natural catastrophes, new numerical models need to be developed that complement existing
Manuel del Jesus   +2 more
doaj   +1 more source

Numerical simulations of airflow in the human pharynx of OSAHS patients

open access: yesCurrent Directions in Biomedical Engineering, 2015
: Computational Fluid Dynamic simulations are performed in real patient individual pharynx geometries of an Obstructive Sleep Apnea patient. The Navier-Stokes equations as well as the Reynolds Averaged Navier-Stokes equations and k − ∊ and k −ω ...
Kluck C., Buzug T.M.
doaj   +1 more source

Analysis of separating acoustics from the thermoacoustic system of methane combustion based on Reynolds-averaged Navier-Stokes and linearized Navier-Stokes equations

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2023
A model coupling Reynolds-averaged Navier-Stokes (RANS) method and linearized Navier-Stokes equations (LNSEs) was established in order to investigate the acoustic excitation and attenuation effect from a coupling perspective of time–space–frequency under
Yaorui Shen, Jianqin Fu, Jingping Liu
doaj   +1 more source

Investigation of numerical approaches to modeling large-scale turbulent vortex flows in the mode of vertical take-off and landing of an aircraft [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2021
The study considers the operation of an unmanned aerial vehicle in hovering mode over a flat landing platform. As a propulsion system, impellers are used, which are a system of a propeller rotating inside an air ring.
Dmitriy V. Rybakov   +4 more
doaj   +1 more source

Computational study on flow through truncated conical plug nozzle with base bleed

open access: yesPropulsion and Power Research, 2019
Conical plug nozzle and truncated conical plug nozzle are advanced rocket nozzles suitable for use as altitude compensating nozzles. In this study flow through the conical plug and truncated conical plug nozzles are numerically simulated to first ...
Prasanth P. Nair   +2 more
doaj   +1 more source

Slug Regime Transitions in a Two-Phase Flow in Horizontal Round Pipe. CFD Simulations

open access: yesApplied Sciences, 2020
The main objective of the study is to propose a technical solution integrated into the pipeline for the transition of the flow regime from slug to bubbly two-phase flow.
Vitaly Sergeev   +4 more
doaj   +1 more source

Performance of turbulence and cavitation models in prediction of incipient and developed cavitation [PDF]

open access: yes, 2017
The aim of this article is to assess the impact of turbulence and cavitation models on the prediction of diesel injector nozzle flow. Two nozzles are examined, an enlarged one, operating at incipient cavitation, and an industrial injector tip, operating ...
Afzal H   +16 more
core   +1 more source

Software package to calculate the aerodynamic characteristics of aircrafts

open access: yesТруды Института системного программирования РАН, 2018
The software package to calculate parameters of three-dimensional steady and unsteady gas flows in complex devices is presented. The mathematical flow model used in package is based on the Reynolds-averaged Navier Stokes equations for a two-component ...
V. N. Koterov   +2 more
doaj   +1 more source

Influence of Turbulence Effects on the Runup of Tsunami Waves on the Shore within the Framework of the Navier–Stokes Equations

open access: yesFluids, 2022
This paper considers turbulence effects on tsunami runup on the shore in tsunami simulations using the system of three-dimensional Navier–Stokes equations.
Andrey Kozelkov   +3 more
doaj   +1 more source

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