Hydraulic fluid heats when flowing through a restriction as the pressure energy upstream of the restriction is converted into thermal energy.
|FLUID||c~BTU/ lb./ °F*|
|Skydrol 500 B-4||0.39|
*Specific Heat at 100°F.
If a Lee orifice is flowing MIL-H-83282 at 120°F and 2500 psid, the temperature rise across the Lee orifice is computed as follows:
For MIL-H-83282 at 120°F, S = 0.82, c = 0.50