A New Study on the Gap Effect of an Airfoil with Active Flap Control Based on the Overset Grid Method

2021 ◽  
Author(s):  
Zhiyuan Hu ◽  
Guohua Xu ◽  
Yongjie Shi
Keyword(s):  
Grid Method ◽  
Gap Effect ◽  
Overset Grid ◽  
Overset Grid Method ◽  
Active Flap

Numerical simulation of an X-wing flapping wing MAV by means of a deforming overset grid method

2015 ◽  
Author(s):  
Shuanghou Deng ◽  
Tianhang Xiao ◽  
Mustafa Percin ◽  
Bas van Oudheusden ◽  
Hester Bijl ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Grid Method ◽  
Flapping Wing ◽  
Overset Grid ◽  
Overset Grid Method

Prediction of Slamming Loads on Catamaran Wetdeck Using CFD

2015 ◽  
Author(s):  
Ahmed Swidan ◽  
Giles Thomas ◽  
Dev Ranmuthugala ◽  
Irene Penesis ◽  
Walid Amin ◽  
...  
Keyword(s):  
Model Simulation ◽  
Three Dimensional ◽  
Grid Method ◽  
Computationally Efficient ◽  
Overset Grid ◽  
Force Magnitude ◽  
Overset Grid Method ◽  
Drop Tests ◽  
Transient Velocity ◽  
Transient Velocity Profile

Wetdeck slamming is one of the principal hydrodynamic loads acting on catamarans. CFD techniques are shown to successfully characterise wetdeck slamming loads, as validated through a series of controlled-speed drop tests on a three-dimensional catamaran hullform model. Simulation of water entry at constant speed by applying a fixed grid method was found to be more computationally efficient than applying an overset grid. However, the overset grid method for implementing the exact transient velocity profile resulted in better prediction of slam force magnitude. In addition the splitting force concurrent with wetdeck slam event was quantified to be 21% of the vertical slamming force.

An overset grid method for large eddy simulation of turbomachinery stages

2014 ◽  
Vol 274 ◽  
pp. 333-355 ◽  
Author(s):  
Gaofeng Wang ◽  
Florent Duchaine ◽  
Dimitrios Papadogiannis ◽  
Ignacio Duran ◽  
Stéphane Moreau ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Grid Method ◽  
Overset Grid ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Overset Grid Method

Utilization of Cold-Flow Numerical Simulation With Overset Grid Method in Development Process of Aeroengine Combustor

2010 ◽  
Author(s):  
Mitsumasa Makida ◽  
Naoki Nakamura ◽  
Osamu Nozaki
Keyword(s):  
Numerical Simulation ◽  
Development Process ◽  
Grid Method ◽  
Simulation Method ◽  
Simulation Methods ◽  
Overset Grid ◽  
Simulation Code ◽  
Screening Process ◽  
Cold Flow ◽  
Overset Grid Method

In the TechCLEAN project of JAXA, a combustor for a small aircraft engine has been developed. The combustor was tuned to show the behavior of the Rich-Lean combustion through combustion tests under atmospheric and practical conditions. In the development process of the combustor, numerical simulation methods were also utilized as analysis tools to accelerate the development of the combustor. To use in the screening process of the combustor design, we focused on cost-effective simulation methods and adopted the cold-flow RANS simulation code UPACS which has been developed in JAXA. And to simplify the treatment of calculation grids of the combustor with complicated configuration, we also utilized combination of the overset grid method with the attached multi-block grid method. This simulation method was applied to three phases in the combustor development process; first to the analysis of the combustor configuration to adjust the overall pressure loss, secondly to the analysis of flame stability, and thirdly to the tuning of air flow ratio to optimize emission characteristics of full annular combustors. Finally, the full annular combustor was successively tuned to reduce NOx emissions to 38.1% of the ICAO CAEP4 standard under ICAO LTO cycles, also sustaining basic performances as an aircraft combustor.

711 Assessment of Overset Grid Method for Flow around a Solid Body

2006 ◽  
Vol 2006.81 (0) ◽  
pp. _7-11_
Author(s):  
Kohei NOMURA ◽  
Takeo KAJISHIMA ◽  
Takashi OHTA
Keyword(s):  
Solid Body ◽  
Grid Method ◽  
Overset Grid ◽  
Overset Grid Method

Wind turbine rotor-tower interaction using an incompressible overset grid method

Wind Energy ◽  
2009 ◽  
Vol 12 (6) ◽  
pp. 594-619 ◽  
Author(s):  
Frederik Zahle ◽  
Niels N. Sørensen ◽  
Jeppe Johansen
Keyword(s):  
Wind Turbine ◽  
Grid Method ◽  
Turbine Rotor ◽  
Overset Grid ◽  
Overset Grid Method ◽  
Wind Turbine Rotor

scholarly journals Direct numerical simulation of particulate flows with an overset grid method

2017 ◽  
Vol 343 ◽  
pp. 414-431 ◽  
Author(s):  
A.R. Koblitz ◽  
S. Lovett ◽  
N. Nikiforakis ◽  
W.D. Henshaw
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Grid Method ◽  
Particulate Flows ◽  
Overset Grid ◽  
Overset Grid Method
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