Question

The range of Re in the typical flight is ___________

(a) 10^6 to 10^9

(b) 10^5 to 10^9

(c) 10^6 to 10^8

(d) 10^6 to 10^10

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This intriguing question comes from Aircraft Force Systems in portion Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

The correct answer is (a) 10^6 to 10^9

Explanation: The range of Re in the typical flight is 10^6 to 10^9. The mathematical formula for reynolds number is given by Re=\(\frac{\rho Vl}{\mu}\) where Re is Reynolds number, ρ is density of the fluid, V is the velocity of the fluid, l is the length of the fluid and μ is the dynamic viscosity of the fluid.