Experimental Investigation on Temperature Separation of Dual Forced Flow Vortex Tube

Abstract

The vortex tube is a device, which emanates hot and cold air streams simultaneously at its two ends from a source of pressurized air: warmer, gas leaves near the periphery at one end as a free vortex and colder, gas leaves via an ori¯ce at the opposite end as a forced vortex. The forced vortex strikes back again by design modi¯cations, result in the formation of one more forced vortex°ow. Thus, the modi¯ed vortex tube is named as dual forced°ow vortex tube (DFFVT). Experimental study is carried on temperature separation of DFFVT for varying pressures, mass°o w rates and optimum cold fractions at two ends for e±cient temperature drop is revealed. The modi¯ed vortex tube yields e®ectual temperature drop through one end at a lower cold fraction meanwhile providing e®ective cooling at the other end with higher cold fraction and vice versa.