Use the Atmospheric properties table below to calculate the
speed of sound for altitude and fill Table 1 in the range of
altitude 0 to 100000 m. However, the speed of sound is calculated
from the following equation. a=20.04√Ts Here, let a be sound
velocity (m / s) and Ts be temperature.
The flight path of the first stage of Zenger flies almost along
the dynamic pressure of 50 kPa. Calculate this dynamic pressure pd
50 kPa line and complete Table 2 of Mach numbers for altitude. The
Mach number is in the range of 0 to 7, and the altitude is in the
range of 0 to 40 km.
The dynamic pressure is calculated
from the following equation.
= 1/2
ρ
Here, let ρ be density and v be flight
speed.
The Mach number M is M = v / a.
Table 1 Atmospheric properties Temperature K Density kg /m^3 Altitude me 海面) 1 000 3 000 5 000 10 000 25 000 50 000 75 000 100 000 130 000 160 000 200 000 300 000 400 000 600 000 1 000 000 288.150 281.651 268.65 255.65 223.25 221.55 270.65 206.65 195.08 469.27 696.29 845.56 976.01 995.83 999.85 1 000.00 Pressure ratio 1.0000(=0.1013 MPa) 8.8700 X 10-1 6.6919 X 10-1 5.3313 X 10-1 2.6151 x 10-1 2.5158 x 10-2 7.8735 X 10-4 2.0408 X 105 3.1593 X 10- 7 1.2341 X 10-8 2.9997 x 10-9 8.3628 x 10-10 8.6557 X 10-11 1.4328 x 10-11 8.1056 X 10-13 7.4155 X 10-11 1.2250 1.1117 9.0912 x 10-1 7.6312 X 10-1 4.1351 x 10-1 4.0084 X 10 2 1.0269 x 10-3 3.4861 x 10-6 5.604 x 10- 7 8.152 x 10- 9 1.233 X 10-9 2.541 X 10-10 1.916 x 10-11 2.803 X 10-12 2.137 X 10-13 3.561 X 10-15 “U. S. Standard Atmosphere" National Oceanic and Atmospheric Administration, NASA and USAF,
Table 1 Speed of sound with respect to altitude 已 Altitude m Speed of sound m/sek ܒܢ { ܒܢ A
Table 2 Mach number for altitude ܒܨAltitude m Mach number ܒܢ ܒܢ ( ܒܢ ܒܢ ܒܢ ܒܢ
Use the Atmospheric properties table below to calculate the speed of sound for altitude and fill Table 1 in the range of
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