Ask Question
26 January, 02:30

The aerodynamic behavior of a flying insect is to be investigated in a wind tunnel using a ten-times scale model. It is known that the insect's velocity depends on its size (characteristic length L), wing flapping frequency ω, surrounding fluid's density rho and viscosity μ. If the insect flaps its wings 50 times a second when flying at 1.25 m/s, determine the wind tunnel air speed and wing oscillation frequency required for dynamic similarit

+4
Answers (1)
  1. 26 January, 06:05
    0
    Write the equation for Reynolds number as follows:

    Re = VL/v

    For dynamic similarity,

    (VL/v) m + (VL/v) p ... (1)

    Since, the model and prototype are in same medium, the kinematic viscosity remains same.

    From equation (1), we can write

    (VL) m = (VL) p

    Here, L represents length, and V is the velocity.

    Re-write the equation as follows:

    Vm = Lp/Lm x Vp

    Substitute 1/8 for Lp/Lm and 1.5m/s for Vp.

    Vm = 1/8 x 1.5

    Vm = 0.1875m/s

    Therefore, the wind tunnel air speed is 0.1875m/s.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The aerodynamic behavior of a flying insect is to be investigated in a wind tunnel using a ten-times scale model. It is known that the ...” in 📙 Engineering if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers