Technology of 3D Simulation of High-Speed Damping Processes in the Hydraulic Brake Device

Efremov, V. R.; Козелков, А. С.; Дмитриев, С. А.; Kurkin, Andrey; Курулин, В. В.; Utkin, D. A.

doi:10.5772/intechopen.83358

Cited by 2 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…). (11) This allowed us to get rid of the derivative dρ dt , which took large values in areas of free surface, and thereby improved stability of the iterative procedure of finding the solution [41].…”

Section: Cavitating Flow Modelingmentioning

confidence: 99%

Numerical Approach Based on Solving 3D Navier–Stokes Equations for Simulation of the Marine Propeller Flow Problems

Kozelkov,

Kurulin,

Kurkin

et al. 2023

Fluids

View full text Add to dashboard Cite

The report presents the approach implemented in the Russian LOGOS software package for the numerical simulation of the marine propeller flow problems using unstructured computational meshes automatically generated by the mesh generator. This approach includes a computational model based on the Navier–Stokes equation system and written with respect to the physical process: the turbulent nature of flow with transient points is accounted using the Reynolds Averaged Navier–Stokes method and the k–ω SST model of turbulence by Menter along with the γ–Reθ (Gamma Re Theta) laminar-turbulent transition model; the Volume of Fluid method supplemented with the Schnerr–Sauer cavitation model is used to simulate the cavitation processes; a rotating propeller is simulated by a moving computational mesh and the GGI method to provide conformity of the solutions on adjacent boundaries of arbitrarily-shaped unstructured meshes of the two domains. The specific features of the numerical algorithms in use are described. The method validation results are given; they were obtained because of the problems of finding the performance curves of model-scale propellers in open water, namely the problems of finding the performance of propellers KP505 and IB without consideration of cavitation and the performance of propellers VP1304 and C5 under cavitation conditions. The paper demonstrates that the numerical simulation method presented allows for obtaining sufficiently accurate results to predict the main hydrodynamic characteristics for most modes of operation of the propellers.

show abstract

Section: Cavitating Flow Modelingmentioning

confidence: 99%

Numerical Approach Based on Solving 3D Navier–Stokes Equations for Simulation of the Marine Propeller Flow Problems

Kozelkov,

Kurulin,

Kurkin

et al. 2023

Fluids

View full text Add to dashboard Cite

show abstract

“…The static adaptation method uses the faced-based model of memory that allows efficiently using it on unstructured grids [15]. The approach described in the paper has been implemented in the LOGOS software package [1,2,5,9,[16][17][18], the Russian software package for engineering analysis.…”

Section: Introductionmentioning

confidence: 99%

Two Methods to Improve the Efficiency of Supersonic Flow Simulation on Unstructured Grids

Козелков

Struchkov

Strelets

2022

Fluids

View full text Add to dashboard Cite

The paper presents two methods to improve the efficiency of supersonic flow simulation using arbitrarily shaped unstructured grids. The first method promotes increasing the numerical solution convergence rate and is based on the geometric multigrid method for initialization of the flow field. The method is used to obtain the initial field of distributed physical quantity values, which maximally corresponds to the converged solution. For this purpose, the problem simulation is performed on a series of coarse grids beginning from the coarsest one in this series. Upon completion of simulations, the solution obtained is interpolated to a finer grid and used for initialization of simulations on this grid. The second method allows increasing the numerical solution accuracy and is based on statically adapting the computational grid to the flow specifics. The static adaptation algorithm provides automatic refinement of the computational grid in the region of specific features of flow, such as shock waves typical for supersonic flows. This algorithm provides a better description of the shock-wave front owing to the local grid refinement, with the local refinement region being automatically selected. Results of using these methods are demonstrated for the two supersonic aerodynamics problems: the simulation of the bow shock strength at a given distance under axially symmetric body Seeb-ALR and a mock-up aircraft Lockheed Martin 1021. It is shown that in both cases, the numerical solution convergence rate is increased owing to the use of the geometric multigrid method for initialization and a higher quality and a higher accuracy of solution is gained owing to the local grid refinement (using static adaptation means) near the shock-wave front.

show abstract

Technology of 3D Simulation of High-Speed Damping Processes in the Hydraulic Brake Device

Cited by 2 publications

References 11 publications

Numerical Approach Based on Solving 3D Navier–Stokes Equations for Simulation of the Marine Propeller Flow Problems

Numerical Approach Based on Solving 3D Navier–Stokes Equations for Simulation of the Marine Propeller Flow Problems

Two Methods to Improve the Efficiency of Supersonic Flow Simulation on Unstructured Grids

Contact Info

Product

Resources

About