REAL-GAS EFFECTS IN CRITICAL-FLOW-THROUGH NOZZLES AND TABULATED THERMODYNAMIC PROPERTIES

摘要

The mass-flow rate for real gases passing through critical-flow nozzles has been calculated. The result of this calculation is presented in the form of a critical-flow factor that provides a convenient means of calculating the mass-flow rate;the variation of the critical-flow factor also provides a mea sure of the real-gas effects. In addition the results include the nozzle-throat velocity, the compressibility factor, the specific heat, the specific heat ratio, the speed of sound, and the critical pressure, temperature, and density ratios. These results are tabulated as functions of upstream stagnation pressure and temperature for air, nitrogen, oxygen, normal hydrogen, parahydrogen, and steam. For steam the pressure ranges up to 300 atmospheres and the temperature ranges from 700° to 1500° R. For hydrogen the pressure ranges up to 100 atmospheres and the temperature ranges from 175° to 700° R. For the other gases the pressure ranges to 100 atmospheres and the temperature ranges from 400° to 700° R.