A jet is flying at a speed of 356 m/s in an air temperature of 25 C. What is the Mach number of the jet?
- SpacemanLv 78 months agoFavorite Answer
v(j) = velocity of jet = 356 m/s
v(s) = velocity of sound = to be determined
M = Mach number = to be determined
The speed of sound [v(s)] depends on the type of medium through which the sound is
traveling and the density of the medium.
Air temperature = 25 °C
γ = (gamma) ratio of specific heats = 1.4 for air at STP*
*standard temperature and pressure
R = gas constant = 286 m²/s²/K for air
T = absolute temperature (273.15 K + °C) = 298.15 K
v(s) = speed of sound = to be determined
v(s) = √(γRT)
v(s) = 345.5130388 m/s ≈ 346 m/s
M = v(j)/v(s)
M = 1.030351854 ≈ 1.03
- daniel gLv 78 months ago
A big piece of the puzzle missing here to solve this.
''What is the density altitude ?? '' or is this sea level.
That would equate to just over mach 1.