Computation of turbulent flows around rotating bodies using unstructured grids

Date

2006-01-01

Author

Gönç, L.O.
Ak, M.A.
Tuncer, İsmail Hakkı
Aksel, M.H.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

196
views

0
downloads

This paper presents the development of a 3-D parallel flow solver for turbulent flows around rotating bodies using unstructured grids. Cell centered finite volume solver which employs Roe's upwind flux differencing scheme, Spalart-Allmaras turbulence model and Runge-Kutta explicit multistage time stepping scheme is presented. Arbitrary Lagrangian Eulerian (ALE) formulation is implemented for moving grids. The computational grid is partitioned by METIS and PVM is used for inter-process communication. The main objective of this study is to be able to solve unsteady turbulent flows around rotating missile configurations and to evaluate the aerodynamic stability derivative coefficients. Solutions over a non-spinning and spinning M910 projectile configuration are presented. Aerodynamic stability derivative coefficients obtained are found to be qualitatively in agreement with the analytical solutions, experimental data and published numerical solutions.

URI

https://hdl.handle.net/11511/56915

DOI

https://doi.org/10.2514/6.2006-2825

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Computation of external flow around rotating bodies Gönç, L. Oktay; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2005) A three-dimensional, parallel, finite volume solver which uses Roe's upwind flux differencing scheme for spatial and Runge-Kutta explicit multistage time stepping scheme for temporal discretization on unstructured meshes is developed for the unsteady solution of external viscous flow around rotating bodies. The main aim of this study is to evaluate the aerodynamic dynamic stability derivative coefficients for rotating missile configurations. Arbitrary Lagrangian Eulerian (ALE) formulation is adapted to the ...
Modelling of graded rectangular micro-plates with variable length scale parameters Aghazadeh, Reza; Dağ, Serkan; Ciğeroğlu, Ender (2018-03-10) This article presents strain gradient elasticity-based procedures for static bending, free vibration and buckling analyses of functionally graded rectangular micro-plates. The developed method allows consideration of smooth spatial variations of length scale parameters of strain gradient elasticity. Governing partial differential equations and boundary conditions are derived by following the variational approach and applying Hamilton's principle. Displacement field is expressed in a unified way to produce n...
Analysis of thin walled open section tapered beams using hybrid stress finite element method Akman, Mehmet Nazım; Oral, Süha; Department of Mechanical Engineering (2008) In this thesis, hybrid stress finite element is formulated for the analysis of the isotropic, thin walled, open section beams with variable cross sections. The beam element has two nodes each having seven degrees of freedom. Assumption of stress field is sufficient to determine the element stiffness matrix. Axial, flexural and torsional effects are taken into account in the analysis. The methodology can be applied both to the tapered and the uniform beams. Throughout this study, firstly element cross-sectio...
Consideration of spatial variation of the friction coefficient in contact mechanics analysis of laterally graded materials Dağ, Serkan (2016-01-01) This paper presents a new analytical approach for sliding contact analysis of laterally graded materials, which allows taking into account the spatial variation of the friction coefficient. The method is developed by considering a sliding frictional contact problem between a laterally graded elastic medium and a rigid flat punch. Governing partial differential equations entailing the displacement components are derived in accordance with the theory of plane elasticity. General solutions are determined and b...
Approximate analytical solutions to the double-stance dynamics of the lossy spring-loaded inverted pendulum SHAHBAZI, Mohammad; Saranlı, Uluç; BABUSKA, Robert; LOPES, Gabriel A. D. (IOP Publishing, 2017-02-01) This paper introduces approximate time-domain solutions to the otherwise non-integrable double-stance dynamics of the 'bipedal' spring-loaded inverted pendulum (B-SLIP) in the presence of nonnegligible damping. We first introduce an auxiliary system whose behavior under certain conditions is approximately equivalent to the B-SLIP in double-stance. Then, we derive approximate solutions to the dynamics of the new system following two different methods: (i) updated-momentum approach that can deal with both the...

Citation Formats

L. O. Gönç, M. A. Ak, İ. H. Tuncer, and M. H. Aksel, “Computation of turbulent flows around rotating bodies using unstructured grids,” 2006, vol. 1, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56915.