Engineering modeling of the laminar–turbulent transition: Achievements and problems (Review)

Бойко, А. В.; Kirilovskiy, S. V.; Маслов, А. А.; Poplavskaya, T. V.

doi:10.1134/s002189441505003x

Cited by 54 publications

(8 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The main result of the software package is the distribution of so-called N-factors for Tollmien-Schlichting (TS) and crossflow (CF) instabilities in the boundary layer. The LTT onset is predicted by the e N method based on the N-factor distribution and values of the threshold N-factors (see, e.g., [5]). The software constructs two-dimensional slices perpendicular to the flow-exposed surface (wall) for 3D boundary layers.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Probability-Based Methods for Estimating the Aerodynamic Boundary-Layer Thickness

Бойко

Demyanko

Nechepurenko

et al. 2021

Fluids

View full text Add to dashboard Cite

In this paper, known probabilistic methods for estimating the thickness of the boundary layer of a two-dimensional laminar flow of viscous incompressible fluid are extended to three-dimensional laminar flows of a viscous compressible medium. Their applicability to the problems of boundary-layer stability is studied with the LOTRAN3 software package, which allows us to compute the position of laminar-turbulent transition in three-dimensional aerodynamic configurations.

show abstract

Section: Introductionmentioning

confidence: 99%

On the Use of Probability-Based Methods for Estimating the Aerodynamic Boundary-Layer Thickness

Бойко

Demyanko

Nechepurenko

et al. 2021

Fluids

View full text Add to dashboard Cite

show abstract

“…Another important factor affecting the position of the LTT is bluntness of the nose or the leading edge of the vehicle. This factor shifts LTT downstream [3][4][5][6]. Thus, the presence of a roughness on the blunt nose of the vehicle creates an ambiguous situation: the stabilizing effect of dulling competes with the destabilizing effect of roughness.…”

Section: Introductionmentioning

confidence: 99%

The effect of roughness of blunted nose of cone on the development of disturbances and laminar-turbulent transition in a hypersonic boundary layer

Gromyko

Bountin

Polivanov

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. The paper presents data on the effect of a distributed roughness of the blunted nose of the cone on the position of the laminar-turbulent transition. The studies were carried out at Mach number 5.95. It is found that the position of the roughness plays an important role in the transition process, it is obtained that the roughness has the greatest effect on the t the presence of a roughness on the nose of the model, even at subcritical Reynolds numbers, affects the pulsation processes in the boundary layer.

show abstract

“…The number of cells of the volume grid was 4.7 × 10 6 . The calculations were carried out using the the ANSYS FLUENT software package, which was widely used in technical [2] and scientific research [3]. Most of the works, which results we compared with our results, also used FLUENT in their calculations.…”

Section: Statement Of the Problemmentioning

confidence: 99%

Consideration of the respiratory cycle asymmetry in the numerical modeling of the submicron particles deposition in the human nasal cavity

Ganimedov¹,

Muchnaya²

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract.A detailed study of the behavior of the U-shaped curve was conducted, which described deposition efficiency of inhaled particles in human nasal cavity. The particles in the range from 1 nm to 20 μm are considered. Calculations of air flow and particles deposition were carried out for symmetrical (idealized) and asymmetrical (real) breathing cycles at the same volume of inhaled air, which corresponded to calm breathing. The calculations were performed on the base of the mathematical model of the nasal cavity of healthy person using software package ANSYS (FLUENT 12). The comparison of the results was made between these calculations, and also with the results obtained at quasi-stationary statement of the problem for several values of flow rate. The comparison of the results of quasi-stationary calculations with available calculated and experimental data (in vivo in vitro) was fulfilled previously. Good agreement of the results was obtained. It is shown that the real distribution of deposition efficiency as a function of the particle size can be obtained via a certain combination of the results of quasi-stationary calculations, without the use of laborious and timeconsuming non-stationary calculation.

show abstract

Engineering modeling of the laminar–turbulent transition: Achievements and problems (Review)

Cited by 54 publications

References 45 publications

On the Use of Probability-Based Methods for Estimating the Aerodynamic Boundary-Layer Thickness

On the Use of Probability-Based Methods for Estimating the Aerodynamic Boundary-Layer Thickness

The effect of roughness of blunted nose of cone on the development of disturbances and laminar-turbulent transition in a hypersonic boundary layer

Consideration of the respiratory cycle asymmetry in the numerical modeling of the submicron particles deposition in the human nasal cavity

Contact Info

Product

Resources

About