Ranque Hilsch Vortex Tube Lab Report

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The effects of L/d ratio and cold mass fraction on cooling capacity of Ranque-Hilsch vortex tube Mr. S.S.Jadhav†, Prof. Kiran D. Devade‡ †PG student, Heat & Power Engineering, ICEM, Pune, Pune University, India ‡Professorl, ICEM, Pune, Pune University, India Abstract Ranque- Hilsch vortex tube (RHVT) is a simple device capable of splitting a compressed gas stream into a cold and a hot outlet stream without any peripheral source of energy supply. This paper presents results of Maximum cooling capacity at given L/D ratios of 22.5, 32.5, 42.5, 52.5 by varying cold mass fraction from 0.1 to 0.9 for 1,2,3,4 number of nozzles carried out on Ranque– Hilsch vortex tube (RHVT). Different parameters such as L/D ratio, cold mass fraction,…show more content…
It is simple in design and has no complicated parts. Vortex tube consists of inlet nozzle, vortex chamber, cold end orifice and hot end with diffuser and tube. It is based on phenomenon of separation of compressed air into low temperature section and hot temperature section by means of energy separation. When high pressure air is tangentially enforced into vortex tube through inlet nozzles, a swirling flow is created inside the vortex tube. When gas swirls towards the center of tube it is expanded and cooled. In the vortex tube part of air passes towards the hot end and another part exists through cold exhaust directly. The part of gas in vortex tube reverses to the obstruction created and move from hot end to cold end. At hot end gas escapes at higher temperature and that at cold end gas escapes at lower temperature than inlet…show more content…
R. Pachare et al. [12] This paper reveals about the performance of vortex tube by varying number of inlets. The parameters which were varied are number of nozzles, mass flow rate and inlet pressure, it has been noticed that the results obtained after investigation shows that as there is increase in number of nozzles the value of coefficient of performance also increases, at lower pressure there is less cooling effect as there is low thermal separation occurs at that pressure, but the value of coefficient of performance is maximum at that point. 3. Design and Constructional Details Following are the design parameters where there are Four different length of tubes as, L = 680 mm, 550 mm, 420 mm and 292 mm whereas, Diameter D= 13 mm, was chosen and material selected is brass. The Nozzles used are 1, 2, 3 and 4 respectively. Diffuser angles used are 30º, 45º, 60º and 90º. The geometrical design parameters which are used in the experimentation are given below in Table1. These parameters were tested and their results were compared. The material selected for vortex tube is brass as it gives better result for energy separation. Table 1. Vortex tube Design parameters Number of tubes Length of tube Diameter of tube L/D ratio Cone

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