Computational analysis of energy separation in counter—flow vortex tube

Thakare, Hitesh R.; Parekh, A. D.

doi:10.1016/j.energy.2015.03.058

Cited by 68 publications

(15 citation statements)

References 9 publications

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“…In this paper, we used the SST turbulence model, which proved to be the best in the study of virtually any wall-bounded flow. When using the SST model, there appear significant errors in determining the velocity and pressure values at certain points, but the integral parameters are determined with its help with adequate accuracy and the error does not exceed 10% [16][17][18][19].…”

Section: Mathematical Model Of Non-newtonian Fluids Flowmentioning

confidence: 99%

Increasing the efficiency of highly concentrated coal-water fuel based on the simulation of non-Newtonian fluid flow

Chernetskaya-Beletskaya

Rogovyi

Baranov

et al. 2019

MATEC Web Conf.

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The analysis of further prospects for increasing the efficiency of transportation of coal-water fuel in hydro-transport systems of industrial enterprises is carried out. The mathematical model of the spatial three-dimensional flow of coal-water fuel was developed on the basis of SST turbulence model based on the solution of Navier-Stokes equation. As a result of the calculation, the values of pressure loss, flow rate and velocity distribution over the cross section of the pipeline in the straight section and in the turn were determined, which allowed determining the energy consumption during coal-water fuel transportation in the industrial hydro-transport system. The performed studies allowed us to refine the mathematical model of water-coal suspension flow and, thus, improve the patterns of influence of hydro-transportation scheme and parameters of coal-water fuel on energy consumption for its supply to enterprise consumers. By means of mathematical model of non-Newtonian fluids flow, the patterns of influence of hydro-transport system parameters and transportation modes of coal-water fuel on its energy indicators in industrial hydro-transport systems are determined. The obtained results are related to reduction of energy consumption, optimization of enterprise transport network configuration and increase of efficiency of coal-water fuel transportation to enterprise energy facilities.

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Section: Mathematical Model Of Non-newtonian Fluids Flowmentioning

confidence: 99%

Increasing the efficiency of highly concentrated coal-water fuel based on the simulation of non-Newtonian fluid flow

Chernetskaya-Beletskaya

Rogovyi

Baranov

et al. 2019

MATEC Web Conf.

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“…Таким образом, актуальной становится задача поиска новых, для струйных аппаратов, принципов передачи энергии за счет использования гидродинамических эффектов вращающихся потоков, использование которых позволило создать новые струйные нагнетатели с вихревой камерой смешения, названные вихрекамерными нагнетателями [7]. Они, вследствие принадлежности к струйной технике, и отсутствия подвижных механических частей, обладают высокими показателями надежности и долговечности, и могут создать более высокие давления на выходе из вихревой камеры смешения, благодаря, использованию не только турбулентного обмена, но и действия центробежной силы [8].…”

Section: постановка проблемыunclassified

“…Смесь, образовавшаяся в вихревой камере, поступает на выход через тангенциальный канал выхода из нагнетателя в технологический трубопровод [7]. В качестве перекачиваемых потоков могут быть жидкие и твердые среды [6,8,10]. В случае перекачивания с помощью вихрекамерного нагнетателя газовых сред, необходимо, чтобы плотность перекачиваемого потока была выше плотности активного потока.…”

Section: постановка проблемыunclassified

Vortex Chamber Supercharger Application in Hydraulic and Pneumatic Transport Systems

Роговой

2016

Journal of Mechanical Engineering the National Technical University of Ukraine "Kyiv Polytechnic Institute"

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На основе экспериментальных исследований вихрекамерных нагнетателей рассмотрено применение струйных нагнетателей в системах гидро-и пневмотранспорта. При исследовании пневмотранспортных систем, получено, что коэффициент эжекции по твердому телу вихрекамерного нагнетателя превосходит в два раза достижимый (теоретический) коэффициент эжекции по твердому телу прямоточного струйного аппарата. Построены сводные графики полей струйных нагнетателей, используемых в системах гидро-и пневмотранспорта. Увеличение коэффициента эжекции привело к уменьшению давления активного потока струйного аппарата, вследствие чего снижены затраты энергии на перекачивание заданного массового расхода твердого материала. Применение вихрекамерного нагнетателя в системах перемещения твердых сред позволило увеличить дальность транспортирования как в пневмотранспорте, так и в гидротранспорте. Для двух рабочих режимов работы вихрекамерного нагнетателя построена объединенная расходнонапорная диаграмма. Ключевые слова: вихрекамерный нагнетатель, гидротранспорт, коэффициент эжекции, пневмотранспорт, струйные аппараты.

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“…In Behera et al [4], Eiamsa-ard [5], Shamsoddini et al [6], Avci et al [7], Hamdan et al [8], Khazei et al [9], Manimaran [10,11] efforts are made to describe the possibilities of vortex tube efficiency improvement by changing its geometric parameters. Ouadha et al [12], Han et al [13], Agrawal et al [14], Thakare et al [15,16] described the influence of the thermophysical properties of the gases that are used in vortex tubes on their performance. According to these research the L/D ratio should be as high as possible, but not over L/D = 45.…”

Section: Introductionmentioning

confidence: 99%

Numerical research of compressible turbulent swirl flow with energy separation in a cylindrical tube

Burazer¹,

Novković²,

Knežević³

et al. 2019

FME Transactions

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The aim of this paper is to numerically analyze the energy separation phenomenon in turbulent compressible swirling flow in a cylindrical tube. In that sense, the energy separation in a vortex tube with orifice at cold end closed completely is examined numerically using OpenFOAM software. Obtained results are validated with the experimental ones. For numerical calculations, both two-equation (standard k-ε) and full Reynolds stress turbulence models (LRR) are used. The computational domain is considered to be two-dimensional, and the working fluid-air is treated as calorically perfect gas. Mesh independence test is carried out for four different mesh sizes. Distributions of swirling flow intensity, average swirl and angular velocity clearly show the influence of the swirl presence in the flow. The values of these quantities point to the physics of this extremely complex flow-thermodynamic phenomenon, such is the energy separation. Based on values and distributions of these flow quantities a comparison between incompressible and compressible turbulent swirling flow is performed.

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Computational analysis of energy separation in counter—flow vortex tube

Cited by 68 publications

References 9 publications

Increasing the efficiency of highly concentrated coal-water fuel based on the simulation of non-Newtonian fluid flow

Increasing the efficiency of highly concentrated coal-water fuel based on the simulation of non-Newtonian fluid flow

Vortex Chamber Supercharger Application in Hydraulic and Pneumatic Transport Systems

Numerical research of compressible turbulent swirl flow with energy separation in a cylindrical tube

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