Large Eddy Simulation of Wake Vortices in Ground Effect with Realistic Terrain around Airport

2017 ◽  
Author(s):  
Takashi Misaka ◽  
Shigeru Obayashi
Keyword(s):  
Large Eddy Simulation ◽  
Ground Effect ◽  
Wake Vortices ◽  
Eddy Simulation ◽  
Large Eddy

Large eddy simulation of aircraft wake vortices within homogeneous turbulence - Crow instability

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 292-300 ◽  
Author(s):  
Jongil Han ◽  
Yuh-Lang Lin ◽  
David G. Schowalter ◽  
S. P. Arya ◽  
Fred H. Proctor
Keyword(s):  
Large Eddy Simulation ◽  
Homogeneous Turbulence ◽  
Wake Vortices ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Aircraft Wake ◽  
Crow Instability

Large Eddy Simulation of the Flow Around a Diffuser-Equipped Bluff Body in Ground Effect

2011 ◽  
Author(s):  
Lara Schembri Puglisevich ◽  
Gary Page
Keyword(s):  
Large Eddy Simulation ◽  
Bluff Body ◽  
Vortex Formation ◽  
Ground Effect ◽  
Vortical Flow ◽  
Navier Stokes ◽  
Flow Structures ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Flow Features

Unsteady Large Eddy Simulation (LES) is carried out for the flow around a bluff body equipped with an underbody rear diffuser in close proximity to the ground, representing an automotive diffuser. The goal is to demonstrate the ability of LES to model underbody vortical flow features at experimental Reynolds numbers (1.01 × 106 based on model height and incoming velocity). The scope of the time-dependent simulations is not to improve on Reynolds-Averaged Navier Stokes (RANS), but to give further insight into vortex formation and progression, allowing better understanding of the flow, hence allowing more control. Vortical flow structures in the diffuser region, along the sides and top surface of the bluff body are successfully modelled. Differences between instantaneous and time-averaged flow structures are presented and explained. Comparisons to pressure measurements from wind tunnel experiments on an identical bluff body model shows a good level of agreement.

Within Homogeneous Turbulence: Crow Instability Large Eddy Simulation of Aircraft Wake Vortices

AIAA Journal ◽  
10.2514/2.956 ◽  
2000 ◽  
Vol 38 (2) ◽  
pp. 292-300 ◽  
Author(s):  
Jongil Han ◽  
Yuh-Lang Lin ◽  
David G. Schowalter ◽  
S. Pal Arya ◽  
Fred H. Proctor
Keyword(s):  
Large Eddy Simulation ◽  
Homogeneous Turbulence ◽  
Wake Vortices ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Aircraft Wake ◽  
Crow Instability

scholarly journals Large eddy simulation of wake vortices in the convective boundary layer

2000 ◽  
Author(s):  
Yuh-Lang Lin ◽  
Jongil Han ◽  
Jing Zhang ◽  
Feng Ding ◽  
S. Arya ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Large Eddy Simulation ◽  
Convective Boundary Layer ◽  
Convective Boundary ◽  
Wake Vortices ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Large Eddy Simulation of a complete Harrier aircraft in ground effect

2009 ◽  
Vol 113 (1140) ◽  
pp. 99-106 ◽  
Author(s):  
G. J. Page ◽  
J. J. McGuirk
Keyword(s):  
Large Eddy Simulation ◽  
Ground Effect ◽  
Mean Flow ◽  
Fighter Aircraft ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Flow Features ◽  
Practical Tool ◽  
Vertical Landing ◽  
Development And Validation

Abstract This paper aims to demonstrate the viability of using the large eddy simulation (LES) CFD methodology to model a representative, complete STOVL aircraft geometry at touch down. The flowfield beneath such a jet-borne vertical landing aircraft is inherently unsteady. Hence, it is argued in the present work that the LES technique is the most suitable tool to predict both the mean flow and unsteady fluctuations, and, with further development and validation testing, this approach could be a replacement, and certainly a complementary aid, to expensive rig programmes. The numerical method uses a compressible solver on a mixed element unstructured mesh. Examination of instantaneous flowfield predictions from these LES calculations indicate close similarity with many flow features identified from ground effect flow visualisations, which are well known to be difficult to model using RANS-based CFD. Whilst significant further work needs to be carried out, these calculations show that LES could be a practical tool to model, for example, Hot Gas Ingestion for the Joint Strike Fighter aircraft.

Three-dimensional large eddy simulation of wake vortices - Comparison with field measurements

1997 ◽  
Author(s):  
Alexandre Corjon ◽  
Denis Darracq ◽  
Pascal Venzac ◽  
Philippe Bougeault ◽  
Alexandre Corjon ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Three Dimensional ◽  
Field Measurements ◽  
Wake Vortices ◽  
Eddy Simulation ◽  
Large Eddy
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