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Vortex Tube Experiment

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2. Problem Statement Vortex tube is an altogether different vortex tube to achieve cooling. Vortex tube is simple in itself. However, its working is quite complex in nature. The thermodynamics and physics behind the vortex tube are yet to be understood completely. Many theories have been suggested to explain the physics of the vortex tube. There are various types of configuration are tested using different gases. However, air is most commonly used as the working medium of the vortex tube. L/D ratio and cold mass fraction are the two important performance parameters of the vortex tube. We need to optimize these parameters to develop vortex tube that can be used as a miniature device for Electronics Cooling. One of the objectives is to develop …show more content…

The mass flow rates at hot and cold end outlets are measured by rotameter. The temperature of pressurized air at the inlet and cold and hot outlets were measured by use of digital thermometer with precision tolerance and obtained temperatures values have been converted into kelvins. Temperature probes are placed into hole, which was drilled at the center of the vortex tube and 10 mm away from the cold and the hot outlets. The cavities between the probes and the hole were filled in order to prevent the leakage. A conical valve has been mounted on the hot outlet of the tube in order to adjust the mass flow rate of the hot air. With the help of this valve, cold mass fraction mc was being …show more content…

Compressed air from the compressor (1) passes through the control valve (4) and pressure regulator filter section (5) and enters in the vortex tube (10) tangentially. To ensure the tangentially entry of the compressed air in the vortex tube to have proper swirling of the air special care was taken. The compressed air expands in the vortex tube and divides in to cold and hot streams. The cold air leaves the cold end orifice near the inlet nozzle while the hot air discharges the periphery at the far end of the tube i.e. hot end (11). The control valve (needle valve) controls the flow rate of the hot air (11). Two rotameters (Eureka made) (6) measures the mass flow rates of the hot and cold air. Thermocouples numbered (7) measure the temperature of the leaving cold and hot air in the vortex tube. The pressure of inlet gas is measured by pressure gauge (2) and the temperature of inlet gas is measured by thermocouple (7). In order to uniformly divide the compressed air, a pneumatic connector is used which divide the incoming stream in to two separate streams and supplies to two nozzles of the vortex

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