If the speed of flow past the lower surface of an airplane wing is 110 m/s,...

If the speed of flow past the lower surface of an airplane wing is 110 m/s, what is the speed of flow over the upper surface with give a pressure difference of 900 Pa between upper and lower surfaces? Density of air 1.21 kg/ m³

Solutions

Expert Solution

the speed of flow past the lower surface of an airplane wing is v = 110 m/s
the speed of flow over the upper surface v' = ?
pressure difference between upper and lower surfaces dP = 900 Pa
the density of air ? = 1.21*10^-3 g/cm3.

= 1.21* 10^-3 *10^-3 kg / 10^-6 m³

= 1.21 kg / m³

from Bernoulli's equation, dP = ( 1/ 2) ? [ v'²- v²]

900 = 0.605 [ v'²-110²]

= 0.605 v'² - 7320.5

v' = 116.57 m/s

the speed of flow over the upper surface is 116.57 m/s

genius_generous answered 1 year ago

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