Assume the rate at which air is being pumped into the tank is 0.5 lbm/s. Conside

Question

Assume the rate at which air is being pumped into the tank is 0.5 lbm/s. Consider the instant in time at which there is 1000 lbm of air in the tank Assume the air temperature is uniformly 50 degree F at this instant and is increasing at the rate of 1F/min. Calculate the rate of change of pressure at this instant. Assume that at point on the wing of the Concorde supersonic transport, the air temperature is -10 degree C and the pressure is 1.7 x 104 N/m2. Calculate the density as this point. At the point in the test section of a supersonic wind tunnel, the air pressure and temperature are 0.5 x 105 N/m2 and 240 K, respectively. Calculate the specific volume. Consider a flat surface in an acrodynamic flow (say a sidewall of a wind tunnal.) the dimensions of this surface are 3 ft in the flow direction (the x direction ) and 1 ft perpendicular to the flow direction.

Explanation / Answer

p=RT

T=273-10=263k

p=1.7x10^4

=1.7x10^4/8.314x263=7.77

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