The term “density” in the context of a crosshead piston typically refers to the material density of the piston itself rather than a fluid or gas density. In this case, the density (ρ) of the piston material is a constant value and does not vary during operation. The formula for this type of density is simply:
- ρ = Density of the fluid (in kilograms per cubic meter, kg/m³)
- P = Pressure of the fluid (in pascals, Pa)
- R = Specific gas constant for the fluid (in J/(kg·K))
- T = Temperature of the fluid (in kelvin, K)