2 and 3 are comparisons of the measured and calculation indicator diagrams of expander with air, which was reported earlier (Tatushi, 1985).
In this paper a new mathematical model for simulating the p - [phi] indicator diagram describing the thermodynamic working process inside twin screw expander was proposed and verified with the experimental study.
The pressure is particularly important since it is used to construct a p - [phi] indicator diagram in twin screw expander.
Pressure volume diagrams, also called indicator diagrams, can be drawn to investigate the admission process based on the known volume function.
At that time, it was already common to draw indicator diagrams.
The indicator diagrams of all three modified compressors are superimposed in Figures 12 and 13.