1. G.J. Ranque, Method and Apparatus for Obtaining from a Fluid Under Pressure Two Currents of Fluid at Different Temperatures, US patent, NO.646020, 1934.
2. The use of the expansion of gases in a centrifugal field as cooling process;Hilsch;Rev. Sci. Instrum.,1947
3. A Bibliography and Survey of the Vortex Tube;Westley,1954
4. Unsteady, viscous, circular flow part 3. Application to the Ranque–Hilsch vortex tube;Sibulkin;J. Fluid Mech.,1962
5. Vortex tube as a thermal protective device;Van Patten;Aerosp. Med.,1969