Results 91 to 100 of about 11,397 (207)

A machine learning-based closure for unsteady RANS simulations of vortex shedding

Engineering Applications of Computational Fluid Mechanics
Accurate computational fluid dynamics (CFD) simulations of complex unsteady flows, which are critical for aircraft design and certification, are often limited by uncertainties inherent in turbulence models, particularly those relying on the Boussinesq ...
A. Kawabata, A. Yakeno, S. Obayashi, R. D. Sandberg   +3 more
doaj   +1 more source

Numerical and Experimental Analysis of Transient Flow in Roots Blower [PDF]

, 2018
The performance of rotary positive displacement machines highly depends on the operational clearances. It is widely believed that computational fluid dynamics (CFD) can help understanding internal leakage flows.
Bruecker, C., Ghavami, M., Kovacevic, A., Leto, A., Singh, G., Sun, S. H.   +5 more
core   +1 more source

Numerical Predictions of Tip Shape Effect on Helicopter Rotor Noise in Forward Flight

Havacılık ve Uzay Teknolojileri Dergisi
The effect of helicopter rotor blade tip shape on overall aircraft noise level is analyzed, in forward flight conditions. The infamous HART-II experimental data is used as a base for validations.
Tuğrul Teoman Öztürk, Alim Rüstem Aslan   +1 more
doaj  

On the Reliability of Eddy Viscosity Based Turbulence Models in Predicting Turbulent Flow past a Circular Cylinder Using URANS Approach

Journal of Applied Fluid Mechanics, 2012
Turbulent flow past circular cylinder at moderate to high Reynolds number has been analysed employing an secondorder time accurate pressure-based finite volume method solving two-dimensional Unsteady Reynolds Averaged Navier Stokes (URANS) equations ...
B.N Rajani, A. Kandasamy, S. Majumdar
doaj  

CFD-based design optimization of ducted hydrokinetic turbines. [PDF]

Sci Rep, 2023
Park J, Knight BG, Liao Y, Mangano M, Pacini B, Maki KJ, Martins JRRA, Sun J, Pan Y.   +8 more
europepmc   +1 more source

Affordable and Accurate Numerical Predictions of Helicopter Rotor Noise inForward Flight

Havacılık ve Uzay Teknolojileri Dergisi
In the present work, a numerical methodology is developed for affordable and accurate analysis of helicopter rotor noise in forward flight. The flow field is obtained using unsteady compressible flow analyses using commercially available
Tuğrul Teoman Öztürk, Alim Rüstem Aslan   +1 more
doaj  

Performance Enhancement of the Flexible Transonic Truss-Braced Wing Aircraft Using Variable-Camber Continuous Trailing-Edge Flaps [PDF]

Aircraft designers are to a growing extent using vehicle flexibility to optimize performance with objectives such as gust load alleviation and drag minimization.
Bartels, Robert E., Stanford, Bret K., Waite, Josiah M.   +2 more
core   +1 more source

Study of Convective Flow Effects in Endwall Casing Treatments in Transonic Compressor Rotors [PDF]

, 2012
The unsteady convective flow effects in a transonic compressor rotor with a circumferential-groove casing treatment are investigated in this paper. Experimental results show that the circumferential-groove casing treatment increases the compressor stall ...
Hah, Chunill, Mueller, Martin W., Schiffer, Heinz-Peter   +2 more
core   +1 more source

Highly resolved LES and URANS computations of a differentially heated square cavity

International Journal of Thermofluids
This investigation focusses on the use of two wall-resolved LES approaches for the simulation of the buoyancy driven flow in a differentially heated square cavity, aiming to advance understanding of the flow phenomena involved.
Constantinos Katsamis, Tim Craft, Hector Iacovides, Juan Uribe   +3 more
doaj   +1 more source

Steady and Unsteady Flow Effects of Circumferential Grooves Casing Treatment in a Transonic Compressor Rotor [PDF]

, 2011
The current paper reports on an investigation of steady and unsteady flow effects of circumferential grooves casing treatment in a transonic compressor rotor.
Hah, Chunill
core   +1 more source