Speed of Sound of Hydraulic fluids
Speed of Sound of Hydraulic fluids
(OP)
I'm looking for a source to find the speed of sound of hydraulic fluids. I have the formula, sqr root of the Bulk modulus divided by the density, but I end up with a speed of sound of 225 ft/sec. This doesn't seem reasonableThanks,
Alex
Alex





RE: Speed of Sound of Hydraulic fluids
Doesnt seem right. Speed of sound in air is about 1000 ft/s. Expect speed of sound in liquid to be above 3000 ft/s
Accoustic Velocity = ((F22*144)/(F48*(1+(F22/F20)*(F24+F26)/(F24-F26))))^0.5
F22 = bulk modulas of fluid
F48 = Mass density of fluid
F20 = Pipe modulas of elasticity
F24 = Pipe OD
F26 = Pipe ID
RE: Speed of Sound of Hydraulic fluids
from Mark's Hdbk 8th ed pg.3-35: [for machine oil 0.907 S.G.]
E=189000#/in^2 isothermal
W =density = 0.907*62.4#/ft^3 = 56.6#/ft^3
a = 12*sqrt[Eg/W]
a= 12in/ft * sqrt [(189000#/in^2)*(32.2ft/s^2)/(56.6#/ft^3 )]
a=3935ft/sec
RE: Speed of Sound of Hydraulic fluids
Alex
RE: Speed of Sound of Hydraulic fluids
Do you mean to say "Sonic Velocity" vs "speed of Sound" of fluids. These can mean different things.
Pennpoint