Verification of Thermal Models of Internally Cooled Gas Turbine Blades

Shevchenko, Igor; Rogalev, Nikolay; Rogalev, Andrey; Vegera, Andrey; Bychkov, N. M.

doi:10.1155/2018/6780137

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…This method allows experimental measurement of local heat flow density values in each point of a closed cooling channel (Shevchenko et. al, 2018).…”

Section: Methods Of Calorimetric Measurement In the Liquid-metal Thermostatmentioning

confidence: 99%

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An experimental and numerical study of flow and heat transfer in cooling channels with pin fin-dimple and pin fin-groove arrays

Kindra¹,

Osipov²,

Kharlamova³

et al. 2019

European Conference on Turbomachinery Fluid Dynamics and Hermodynamics

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The study aims at improving the cooling design for the gas turbine components. A numerical and experimental study was conducted to investigate the heat transfer and the flow friction performance in rectangular channels with staggered arrays of pin fins, pin fin-dimples, where dimples located under the pin fins and pin fin-grooves, where the rows of pin fins located in grooves. The comparison based on the experimental data in the Reynolds number range of 4000-14000 showed that, compared with pin fin channel, the pin fin-dimple channel has increased convective heat transfer performance by about 11% and increased flow friction by 9%, the pin fin-groove channel has increased convective heat transfer performance by about 36% and decreased flow friction by 46%. In addition, numerical computations have been done to investigate the physical details about the flow and heat transfer in the pin fin-dimple and pin fin-groove channels. The computations showed that the dimples and grooves increase the nearwall turbulent mixing level by producing strong vortex flows around pin fins, and therefore enhance the convective heat transfer in the channel.

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“…This method allows experimental measurement of local heat flow density values in each point of a closed cooling channel (Shevchenko et. al, 2018).…”

Section: Methods Of Calorimetric Measurement In the Liquid-metal Thermostatmentioning

confidence: 99%

“…The channel outer wall temperature Twall=419 °С, which is equal to the zinc crystallization on the model outer wall at the surface temperature (Shevchenko et. al, 2018).…”

Section: Numerical Simulation Of Thermal-hydraulic Processes In Cooling Channels With Different Flow Turbulators Problem Definition and Smentioning

confidence: 99%

An experimental and numerical study of flow and heat transfer in cooling channels with pin fin-dimple and pin fin-groove arrays

Kindra¹,

Osipov²,

Kharlamova³

et al. 2019

European Conference on Turbomachinery Fluid Dynamics and Hermodynamics

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“…Transitions to new flow performance were done by changes of the input massflow at the channel inlet. The parameters values for computer simulation of the single turbulator were near the physical liquid metal bath test [12]. The smooth channel shows two zones, the zone of flow inlet conditions influence (0<L/d<10) and the stable flow one (10<L/d<36).…”

Section: Methods For the Thermal-hydraulic Process Computer Simulationmentioning

confidence: 99%

Numerical study of heat transfer in rectangular channels with single pin fin and pin fin-dimple

Rogalev

Kindra

et al. 2019

E3S Web Conf.

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Evaluation of the heat transfer and hydraulic performance of a new pin fin-dimple cooling system in a rectangular channel shows its advantage. The performance are compared with the pin fin system ones with 3-D Reynolds averaged Navier-Stokes (RANS) equations. The fluid flow and heat transfer analysis for the Reynolds numbers from 8000 to 70000 involved the shear stress transport turbulence model. The new system forms a high-intensity vortex around the pin fin-dimple that increases the near-wall turbulent mixing level that intensifies the heat transfer. The calculation results indicate increases of the averaged Nusselt number and the averaged friction factor of 7–13% and 7–12% respectively against the pin fin.

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“…При исследовании отдельной лопатки обычно решается проблема охлаждения: моделируется течение охлаждающего воздуха по внутренним каналам с истечением на поверхность (воздушно-пленочное охлаждение) и внешнее турбулентное обтекание профиля лопатки потоком горячего газа (продуктов сгорания) [29][30][31].…”

Section: использование моделейunclassified

The turbulence models review for aerodynamic, thermal and structural problems in jet engine turbines.

Savin,

Plotnikov,

Oshivalov

2023

Appl. Math. Control Sci.

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Analysis of the aerodynamic, thermal and aeroelasticity (including vibration) processes in gas turbine stage is principal for a design and creating turbines and jet engine integrally. In this article was the review showed for the basic problems, which are solved by engineers for the gas turbines design and take a numerical analysis of flow. The special aspects was showed which appearance in the vanes and blades channels for turbojets turbine. The fundamental structure of the boundary layer and vortices on the low and high pressure faces of blade was demonstrated also. A target of this article is a review of current classification of the turbulence models and a review of best practices which include this turbulence models usage for the scientific and engineering problems. Authors describe the basic classification and the small specification with the application domain for each turbulence model (for aircraft). The general equation was demonstrated for URANS with a description of the Spalart – Allmaras, k-ε, k-ω, Menter’s SST, SST Gamma-ReTheta turbulence models. For LES, DES and DNS was showed description with the features only.The article contains the publications analysis with the turbulence models for three basic problems: aerodynamics, cooling problem (heat exchange) and structural problems (aeroelasticity, vibration resistance, stress limits, fatigue resistance). The turbulence models with high frequency of usage was presented in the current review moreover review contains the reasons of the models usage, the models hypothesizes, the changes of models (if it exists) and the solution accuracy. The solution accuracy was analyzed between different models of turbulence and between softwares for CFD. All arguments and conclusions was based on the different publications summary which was used for the review creating, and on data (numerical and graphical results) which was included in the researched CFD-articles. A little bit of the comparative analysis between CFD-softwares was created with the software’s user guides, the public reports and articles which includes the numerical researches in this problem. All results of the current review was presented in the general conclusions in end of article.

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Verification of Thermal Models of Internally Cooled Gas Turbine Blades

Cited by 8 publications

References 25 publications

An experimental and numerical study of flow and heat transfer in cooling channels with pin fin-dimple and pin fin-groove arrays

An experimental and numerical study of flow and heat transfer in cooling channels with pin fin-dimple and pin fin-groove arrays

Numerical study of heat transfer in rectangular channels with single pin fin and pin fin-dimple

The turbulence models review for aerodynamic, thermal and structural problems in jet engine turbines.

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