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Consider the stagnant air at the front edge of a wind and the air rushing over the wing surface at a speed v. Assume pressure at the leading edge to be approximately atmospheric and find the greatest value possible for v in streamline flow; assume that air is incompressible and use Bernoulli’s equation. Take the density of air to be 1.2 kg/m 3 . How does this compare with the speed of sound under these conditions (340 m/s)? Can you explain the difference? Why should there be any connection between these quantities?

Consider the stagnant air at the front edge of a wind and the air rushing over the wing surface at a speed v. Assume pressure at the leading edge to be approximately atmospheric and find the greatest value possible for v in streamline flow; assume that air is incompressible and use Bernoulli’s equation. Take the density of air to be 1.2 kg/m3. How does this compare with the speed of sound under these conditions (340 m/s)? Can you explain the difference? Why should there be any connection between these quantities?

Grade:11

1 Answers

Kevin Nash
askIITians Faculty 332 Points
8 years ago
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