Experimental investigation &amp; CFD analysis of Ranque–Hilsch vortex tube

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

doi:10.1016/j.energy.2017.05.070

Cited by 46 publications

(10 citation statements)

References 32 publications

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“…5 birleştirilip sadeleştirildiğinde, sıcak akışın sıcaklığı ve soğuk akışın sıcaklığı arasındaki fark ∆TRHVT RHVT performansı olarak Eşt. 5'de verilmiştir [22][23][24][25][26].…”

Section: Bulgular Ve Tartişmaunclassified

Paralel Bağlı Karşıt Akışlı Ranque-Hilsch Vorteks Tüp Sisteminde Farklı Çalışma Akışkanı ve Nozul Malzemesi Kullanımının Performansa Etkisinin Deneysel İncelenmesi

Kırmacı

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Bu çalışmada, iç çapı 7 mm, gövde uzunluğu 100 mm ölçülerinde iki adet karşıt akışlı Ranque-Hilsch Vorteks Tüp (RHVT) paralel bağlanarak deneysel sistem oluşturulmuştur. Oluşturulan deneysel sistemdeki karşıt akışlı RHVT'lerde, Pirinç ve Polyamid Plastik malzemeden üretilmiş üç ve beş orfisli nozul kullanılmıştır. Oluşturulan deneysel sistemde giriş basıncı 2.0 ile 7.0 bar basınç değerleri arasında 1.0 bar aralıklarla basınçlı hava, oksijen ve azot kullanılarak RHVT den çıkan soğuk akışkan (Tsoğ), sıcak akışkan (Tsıc) sıcaklığı ve RHVT performansı ∆TRHVT (Tsıc -Tsoğ) cinsinden deneysel olarak etkileşimini incelenmiştir. Bu kapsamda, en iyi performansı sağlayan RHVT'nin optimum giriş basıncı, çalışma akışkanı, nozul malzemesi ve uygun orfis sayısı belirlenerek literatürdeki eksikliğin deneysel olarak incelenerek tamamlanması amaçlanmıştır. Deneysel sonuçlar değerlendirildiğinde, en düşük Tsoğ değeri Pirinç malzemeden üretilmiş beş orfisli nozul ile azot gazının 7.0 bar giriş basıncında 238.25 K, en yüksek Tsıc değerinin, Pirinç malzemeden üretilmiş beş orfisli nozul ile azot gazının 7.0 bar giriş basıncında 316.05 K ve en yüksek ∆TRHVT değeri Pirinç malzemeden üretilmiş beş orfisli nozul ile azot gazının 7.0 bar giriş basıncında 77.8 K olduğu tespit edilmiştir.

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Section: Bulgular Ve Tartişmaunclassified

Paralel Bağlı Karşıt Akışlı Ranque-Hilsch Vorteks Tüp Sisteminde Farklı Çalışma Akışkanı ve Nozul Malzemesi Kullanımının Performansa Etkisinin Deneysel İncelenmesi

Kırmacı

2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…The gas separates into two streams of different temperatures, one flowing along the outer wall and the other along the axis of the tube in the opposite direction. The gas streams leaving the vortex tube have higher and lower temperatures, respectively, than the temperature of the inlet gas [1], [2]. This effect is known as "temperature separation" and was first observed by Ranque in 1931 when studying processes in a dust separation cyclone [3].…”

Section: Introductionmentioning

confidence: 99%

“…In the literature on the two main streams, experimental and modeling analyses are identified; however, the CFD analyses carried out usually are supported by experimental results. As found, the following has been analyzed: the influence of the number of nozzles, both experimentally and computationally [17], [18], the vortex generator material, with the aim of measuring its influence on the thermal performance of the device [19], the nozzle geometry [20], alternative geometries studied for the vortex generator in experimentation [21]- [24], the valve for the hot discharge [25]- [27], the influence of the tube curvature [28], [29] and the use of thermal insulation focused mostly on refrigeration device applications [30], [2]. However, recent efforts have successfully used computational fluid dynamics (CFD) modeling to explain the fundamental principles behind the energy separation produced by the vortex tube [31].…”

Section: Introduction 1 2 Theorical Frameworkmentioning

confidence: 99%

Comparison of an analytical and computational fluid-dynamics models of a commercial Ranque-Hilsch vortex tube operating with Air and Methane

Ahumada

Bula

Valencia

et al. 2019

CT&F Cienc. Tecnol. Futuro

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This paper presents a comparison between the behavior predicted by a computational fluid-dynamic model (CFD) and an analytical model for a commercial vortex tube using air and methane as working fluids, in addition to a three-dimensional mesh for this purpose. The numerical simulation of the turbulent, compressible and high vorticity flow was carried out using RANS equations, the Realizable k-e turbulence model and STAR-CCM+ as software for the equations solution. The variables measured in this work were temperature, pressure and velocity at the exit nozzles of the vortex generator and the tube discharges, resulting in errors of less than 16% between CFD and the analytical model. This numerical study represents a first approximation of the vorticityphenomenon and has been developed in order to establish a prototype simulation model that provides, under certain inlet conditions to the process, preliminary information on the vortex tube industrial implementation for obtaining liquefied natural gas.

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“…Vortex tubes are simple machines which can turn the pressurized air which enters the tube into streams of both hot and cold air at the same time [1]. It was first discovered by the Frenchman George J. Ranque [2], during the course of his work with air compressors and vortex pumps, although this was not the objective of his experiments.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on the efficiency of snail entry in vortex tube fed low inlet air pressure to reduce temperature of low pressure air

Naksanee¹,

Prommas²

2018

IJHT

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This study seeks to explain the use of low pressure inlet air to serve as a cooling agent to lower the discharge temperature of hot air by employing a vortex tube which has a snail nozzle designed specifically to achieve this objective. A series of tests were performed using various snail nozzles with entries of (n) 4-8 at a pressures of 1, 2, and 3 bar, using a counter-flow vortex tube with inner diameters of 10, 12, 14, 16, and 18 mm. During the course of the experiment it was possible to vary the maximum temperature within the vortex as well as the energy separation, by making adjustments to the inlet air stream. It was thus possible for this stream to leave the vortex tube at a temperature level equal to just 40% of the intake mass flow. The vortex tube thus exhibited a cooling capacity capable of taking an inlet temperature at the snail nozzle of 25 °C, and reducing this to a low of-20.2 °C. The largest observed change in air temperature amounting to 45.2° C, was achieved with a vortex tube diameter of 16 mm and the use of a 6-snail nozzle. Cooling efficiency could be calculated to provide η max cooling 41.6 %.

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Experimental investigation & CFD analysis of Ranque–Hilsch vortex tube

Cited by 46 publications

References 32 publications

Paralel Bağlı Karşıt Akışlı Ranque-Hilsch Vorteks Tüp Sisteminde Farklı Çalışma Akışkanı ve Nozul Malzemesi Kullanımının Performansa Etkisinin Deneysel İncelenmesi

Paralel Bağlı Karşıt Akışlı Ranque-Hilsch Vorteks Tüp Sisteminde Farklı Çalışma Akışkanı ve Nozul Malzemesi Kullanımının Performansa Etkisinin Deneysel İncelenmesi

Comparison of an analytical and computational fluid-dynamics models of a commercial Ranque-Hilsch vortex tube operating with Air and Methane

An experimental investigation on the efficiency of snail entry in vortex tube fed low inlet air pressure to reduce temperature of low pressure air

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