Simulation of transonic flows through a turbine blade cascade with various prescription of outlet boundary conditions

Louda, Petr; Straka, Petr; Příhoda, Jaromír

doi:10.1051/epjconf/201818002056

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Obviously, this is important in terms of assessing the correct positioning of the airfoils in the blade cascade for the preset operating parameters. As the desktop review shows, with regard to the distribution of velocity fields determined experimentally and numerically, there is good agreement between the results obtained [10], even for supersonic flows [11], [12]. However, such an analysis has been required to optimise the blade cascade arrangement of airfoils for increased performance.…”

Section: Introductionmentioning

confidence: 78%

Preliminary Numerical Study of a Rectilinear Blade Cascade Flow for a Determination of Aerodynamic Characteristics

Majcher,

Frant,

Kieszek

2023

IREASE

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In the design process of blade arrangements in axial flow machines, it is extremely important to have the aerodynamic characteristics of the airfoils in a rectilinear blade cascade arrangement. However, the source of these characteristics is often difficult to access. This paper presents a methodology for the numerical determination of the characteristics of the lift coefficient, drag coefficient and flow turning angle of the airflow as a function of the angle of attack, by using the example of a blade cascade formed by NACA 65-010 airfoils for the flow intake angle β1=30° and the cascade solidity σ=1. A numerical analysis of the impact of the numerical mesh parameters and the applied turbulence model on the obtained values of the lift coefficient, drag coefficient and flow turning angle of the airfoil in a rectilinear blade cascade has been performed. The numerical values obtained have been compared to experimental results. In this respect, satisfactory agreement has been obtained between experimental and numerical results, confirming the feasibility of numerical determination of the aerodynamic characteristics of airfoils in a rectilinear blade cascade.

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Section: Introductionmentioning

confidence: 78%

Preliminary Numerical Study of a Rectilinear Blade Cascade Flow for a Determination of Aerodynamic Characteristics

Majcher,

Frant,

Kieszek

2023

IREASE

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“…Calculations were realized by means of the ANSYS CFX commercial software. Numerical simulation of flow through blade cascades are usually conducted using the computational domain corresponding to one pitch of the cascade with the inlet and the outlet in the distance about one half of the pitch from the leading and trailing edges respectively, see e. g. Cutrone et al [10] and/or Louda et al [11]. The outlet isentropic Mach number corresponds to the mean value of the static pressure in the traversing plane situated in a relatively short distance downstream the cascade.…”

Section: Numerical Simulationsmentioning

confidence: 99%

CFD Simulation of Transonic Flow Through the Tip-Section Turbine Blade Cascade Intended for the Long Turbine Blade

et al. 2022

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The paper deals with numerical simulations of transonic flow through the turbine blade cascade consisting of flat profiles. The cascade is one of variants of the tip section of ultra-long blades, which were designed for the last stage of the steam turbine. CFD simulations were realized by means of the ANSYS CFX commercial software using the γ-Reθ bypass transition model completed by the two-equation SST turbulence model. Some simulations were made only by the SST turbulence model for comparison. Numerical results were compared with experimental data. Calculations performed for two nominal regimes and two computational domains. In addition to the standard computational domain, the calculation was performed for a domain with an extended output part for the suppression of reflected shock waves. The interaction of the inner branch of the exit shock wave with the boundary layer on the blade suction side leads in the both flow regimes to the flow separation followed by the transition to turbulence. The flow structure in the blade cascade obtained for the extended domain corresponds well to experimental results.

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Simulation of transonic flows through a turbine blade cascade with various prescription of outlet boundary conditions

Cited by 2 publications

References 15 publications

Preliminary Numerical Study of a Rectilinear Blade Cascade Flow for a Determination of Aerodynamic Characteristics

Preliminary Numerical Study of a Rectilinear Blade Cascade Flow for a Determination of Aerodynamic Characteristics

CFD Simulation of Transonic Flow Through the Tip-Section Turbine Blade Cascade Intended for the Long Turbine Blade

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