ALGORITHM FOR INITIATION OF LAMINAR-TURBULENT TRANSITION IN NUMERICAL SIMULATION OF FLOW ON THE BASIS OF RANS EQUATIONS

2011 ◽  
Vol 42 (4) ◽  
pp. 495-514
Author(s):  
Vladimir Viktorovich Vlasenko ◽  
Alexander N. Morozov
Keyword(s):  
Numerical Simulation ◽  
Rans Equations ◽  
Turbulent Transition ◽  
Laminar Turbulent Transition

DIRECT NUMERICAL SIMULATION OF LAMINAR–TURBULENT TRANSITION AT SUPERSONIC FLOW OVER A SHARP FLAT PLATE

2018 ◽  
Vol 49 (5) ◽  
pp. 495-505 ◽  
Author(s):  
Ivan Vladimirovich Egorov ◽  
Alexander Vitalyevich Fedorov ◽  
Quan Hoang Dihn
Keyword(s):  
Numerical Simulation ◽  
Supersonic Flow ◽  
Direct Numerical Simulation ◽  
Flat Plate ◽  
Turbulent Transition ◽  
Laminar Turbulent Transition

Validation of the PTM Transition Model on a 3D Flow Through a Turbine Cascade

2016 ◽  
Author(s):  
Sergiy Yershov ◽  
Viktor Yakovlev
Keyword(s):  
Numerical Simulation ◽  
Boundary Layer ◽  
Numerical Results ◽  
Transitional Flow ◽  
Turbine Cascade ◽  
Production Term ◽  
Flow Acceleration ◽  
Turbulent Transition ◽  
Displacement Thickness ◽  
Laminar Turbulent Transition

This study presents a numerical simulation of a 3D viscous subsonic flow in the VKI-Genoa turbine cascade taking into account the laminar-turbulent transition. The numerical simulation is performed using the Reynolds-averaged Navier-Stokes (RANS) equations and the low-Reynolds k-ω SST turbulence model. The Langtry’s algebraic Production Term Modification (PTM) model is applied for modeling the laminar-turbulent transition. The governing equations are integrated using the second-order accurate Godunov’s type implicit ENO scheme. Computations of both fully turbulent and transitional flows are carried out. Much attention is given to the comparison between the present numerical results and the existing experimental data. The comparison was based on the surface distributions of the isentropic velocity, the friction velocity, the flow acceleration parameter, the displacement thickness, the shape-factor, and the momentum thickness Reynolds number. Velocity profiles upstream and downstream of the transition onset were compared also. The numerical results obtained show an influence of the transition on the secondary flow pattern. In the case of the transitional flow, when compared with the fully turbulence flow case, the endwall boundary layer cross-flow starts upstream, and it is more intensive, but less massive due to a thinner boundary layer in the laminar flow region.

Direct Numerical Simulation on Transition of an Incompressible Boundary Layer on a Flat Plate

2012 ◽  
Vol 268-270 ◽  
pp. 1143-1147
Author(s):  
Ning Li ◽  
Qi Hong Zeng
Keyword(s):  
Numerical Simulation ◽  
Boundary Layer ◽  
Direct Numerical Simulation ◽  
Flat Plate ◽  
Flow Profile ◽  
Mean Flow ◽  
Turbulent Transition ◽  
Incompressible Boundary Layer ◽  
Incompressible Boundary ◽  
Laminar Turbulent Transition

Direct Numerical Simulation(DNS) was carried out for laminar-turbulent transition of an incompressible boundary layer on a flat plate based on disturbance Navier-Stokes(N-S) equation in spatial mode with Massage Passing Interface(MPI) technology. Study on breakdown mechanism of laminar-turbulent transition was carried on. The effect of mean flow distortion on the process of breakdown in laminar-turbulent transition was investigated. Results indicate that change of instability characteristic of mean flow profile plays a key role during process of breakdown.

scholarly journals Numerical simulation of the laminar-turbulent transition on a swept wing in a subsonic flow

2019 ◽  
Vol 1359 ◽  
pp. 012070 ◽  
Author(s):  
S V Kirilovskiy ◽  
A V Boiko ◽  
K V Demyanko ◽  
A V Ivanov ◽  
Y M Nechepurenko ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Subsonic Flow ◽  
Swept Wing ◽  
Turbulent Transition ◽  
Laminar Turbulent Transition
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