Problem 2.90

# Problem 2.90 - ⋅ = As the seaplane touches down At 45 o F...

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Problem 2.90 [Difficulty: 2] Given: Data on seaplane Find: Transition point of boundary layer Solution: For boundary layer transition, from Section 2-6 Re trans 500000 = Then Re trans ρ V x trans μ = V x trans ν = so x trans ν Re trans V = At 45 o F = 7.2 o C (Fig A.3) ν 0.8 10 5 × m 2 s 10.8 ft 2 s 1 m 2 s × = ν 8.64 10 5 × ft 2 s = x trans 8.64 10 5 × ft 2 s 500000 1 100 mph × 60 mph 88 ft s × = x trans 0.295 ft
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Unformatted text preview: ⋅ = As the seaplane touches down: At 45 o F = 7.2 o C (Fig A.3) ν 1.5 10 5 − × m 2 s ⋅ 10.8 ft 2 s ⋅ 1 m 2 s ⋅ × = ν 1.62 10 4 − × ft 2 s ⋅ = x trans 1.62 10 4 − × ft 2 s ⋅ 500000 ⋅ 1 100 mph ⋅ × 60 mph ⋅ 88 ft s ⋅ × = x trans 0.552 ft ⋅ =...
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