SIMULATION OF FLOATING BODIES ON THE BASE OF THE VOF METHOD IN COMBINATION WITH THE GRID DEFORMATION METHOD

2020 ◽  
Author(s):  
K.S. Plygunova ◽  
E.S. Tyatyushkina ◽  
A.S. Kozelkov ◽  
V.V. Kurulin ◽  
D.A. Utkin
Keyword(s):  
Vof Method ◽  
Floating Bodies ◽  
Deformation Method ◽  
Grid Deformation ◽  
Grid Deformation Method

Parallelized Aeroelastic Investigation Based on Delaunay Graph Mapping

2013 ◽  
Vol 444-445 ◽  
pp. 227-232
Author(s):  
Rui Jun Fan ◽  
Hong Chao Gao ◽  
Zhou Zhou
Keyword(s):  
Standard Model ◽  
Parallel Computation ◽  
Dynamic Equation ◽  
Unstructured Grids ◽  
Comparison Analysis ◽  
Deformation Method ◽  
Grid Deformation ◽  
Structure Dynamic ◽  
The Standard Model ◽  
Graph Mapping

In this paper, an effective and well robust dynamic grid deformation method based on Delaunay graph mapping is developed to solve the deformation of the 3-D hybrid multiblocks grids which is combined by near-wall viscosity grids and unstructured grids. Further more, the static aeroelastics problems of the standard model M6 elastic wing is investigated altogether by coupled with structure dynamic equation. The comparison, analysis and investigation were done as well. The CFD grids domain is subdivided into subdomains for parallel computation. And the program is carried out by MPI parallel computation standards.

Fuel efficiency optimization of high-aspect-ratio aircraft via variable camber technology considering aeroelasticity

2020 ◽  
pp. 095441002095996
Author(s):  
Liqiang Guo ◽  
Jun Tao ◽  
Cong Wang ◽  
Miao Zhang ◽  
Gang Sun
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Fuel Efficiency ◽  
Free Form ◽  
Deformation Method ◽  
Grid Deformation ◽  
Computational Structural Dynamics ◽  
Control Matrix ◽  
Nonlinear Static ◽  
Original Configuration

In this study, variable camber technology is applied to improve the fuel efficiency of high-aspect-ratio aircraft with aeroelasticity considered. The nonlinear static aeroelastic analyses are conducted for CFD/CSD (computational fluid dynamics/computational structural dynamics) numerical simulations. The RBF (radial basis function) method is adopted for the transmission of aerodynamic loads and structural displacements, the diffusion smoothing method is employed for grid deformation in each iteration of CFD/CSD coupling, and the FFD (free-form deformation) method is introduced for the parameterization of variable camber wing. Based on the aerodynamic characteristic curves under different cambers, the discrete variable camber control matrix for the high-aspect-ratio aircraft during the cruise phase is established. The Fibonacci method is employed to optimize the fuel efficiency by utilizing the control matrix. The results indicate that the drag during the cruise phase is reduced obviously and the fuel efficiency is improved evidently comparing to the original configuration.

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