NONISENTROPIC MULTISTAGE COMPRESSION
IN PRODUCING A DENSE HOT GAS
By: KISLYKH VV; K.V.K.
Published: NOV-DEC 1990
A method is proposed for making a hot dense gas that is competitive with discharge and shock-wave methods; it has been implemented in a piston apparatus that gives the same temperature as standard devices but at much higher pressures: thousands of atm. Nonisentropic stages enable one to increase the temperature of isentropically compressed nitrogen from about 900 to 2000 K (at 450 atm). Optimization has given apparatus of dimensions smaller by about a factor five than the traditional equipment for isentropic compression to the same parameters and much smaller than shock tubes. In that way, one can obtain nitrogen at above 4000 K or helium up to 14,000 K at about 1000 atm. The heating method can be used in pulsed discharge chambers.