Ultraflux Minisonic Series - Page 7

NT217 C GB1 7 / 27
Propane
Butane
Eurosuper
Leaded super gasoline
Domestic fuel oil
Gas Oil
Gasoline
Kerosene HT
Spirdane
Naphta
JP4
Ethyl alcohol
Methanol
Ethanol
Tetramere
Benzene
Xylene
Water
1000900800700600500400
700
800
900
1000
1100
1200
1300
1400
1500
velocity (m/s)
density (m / s)
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Superheated water involves curve or graph networks taking into consideration the pressure
and the temperature: consult us.
Measurement on petroleum products – values at 15°C / 1 bar (except for butane and
propane):
This speed of sound varies with the pressure and temperature and the coefficients rise in
proportion to the reduction in the speed of sound. For instance:
- Influence of pressure = + 1 m/s per bar for liquid butane and + 0.4 m/s per bar for diesel
oil.
- Influence of temperature = - 6 m/s per °C for butane and – 4 m/s per °C for diesel oil.
Measurements on Gases:
Gases are characterized by speeds of sound far lower than for liquids. Temperature
coefficients are positive (0.2% per degree approximately), and pressure coefficients are of
the second order. Consult us for more details.
As an example, we give an order of magnitude of these speeds in air and in natural gas:
- Air: C = 341 m/s at 20 °C / 1 bar
- Natural gas: C = 400 m/s at 15 °C / 1 bar
D = Kg / m
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