A two-dimensional, flat plate is inclined at a positive angle of attack in a supersonic air stream of Mach 2.0 (M1) and P1 = 50
kPa. Below the plate, an oblique shock wave starts at the leading edge, making an angle of 420 with the stream direction. On the upper side, an expansion occurs at the leading edge.
(a) Find the angle of attack of the plate.
(b) What is the pressure on the lower surface of the plate?
(c) What is the pressure on the upper surface of the plate?
(a) Find the angle of attack of the plate.
(b) What is the pressure on the lower surface of the plate?
(c) What is the pressure on the upper surface of the plate?
1 answer:
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Answer:
i)ω=3600 rad/s
ii)V=7059.44 m/s
iii)F=1245.8 N
Explanation:
i)
We know that angular speed given as
We know that for one revolution
θ=2π
Given that time t= 2 hr
So
ω=θ/t
ω=2π/2 = π rad/hr
ω=3600 rad/s
ii)
Average speed V
Where M is the mass of earth.
R is the distance
G is the constant.
Now by putting the values
V=7059.44 m/s
iii)
We know that centripetal fore given as
Here given that m= 200 kg
R= 8000 km
so now by putting the values
F=1245.8 N