Questions tagged [fluid-dynamics]

Is a subdiscipline of fluid mechanics that describes the flow of liquids and gases

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Modeling of the aerodynamic characteristics of the wing

As a part of the engineering thesis I work on the methods of modeling of aerodynamic characteristics of wing. In it, I rise an issue related to the impact of changes of aircraft attitude during ...
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Why does shear stress drop immediately aft of the leading edge?

From a CFD analysis on a wing, I obtained the following pressure and wall shear stress contours. Why does the wall shear stress show a dip aft of the leading edge and rise again? Re-700K pressure ...
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Does an increase in Mach number lead to a decrease in Total Pressure Recovery (TPR) for supersonic inlets?

I am curious if the total pressure recover for supersonic inlets, in general, decrease for an increase in Mach number.
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What happens to the assumption ∂p/∂y≈0 in the region of separated boundary layer? is it still valid?

I am reading about Boundary Layer(BL) and seems that in the derivation of the governing equations there is an assumption that the pressure, $p$, in $y$ direction is constant, that is: $${\partial p \...
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Circulation around an airfoil at negative α

I was recently reading this very helpful string What is the physical meaning of circulation found in Kutta condition? and it explained very nicely potential flow around an airfoil. My question then is ...
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59 views

Boundary layer thickness calculation

I have tried to calculate all the losses associated with the serpentine intake to calculate the total pressure recovery. I have considered the frictional losses, pressure loss due to bend, approach ...
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149 views

Does Betz's Law apply to jet engine turbines?

Betz's Law says the extractable power from wind is only 59% (16/27) of its original power. $$P_{max} = \frac{16}{27} \frac{1}{2} \rho A v^3$$ Rho is the gas density, A is the cross section area of gas ...
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What happens when a "ground effect" plane approaches the sound barrier?

Does the shock wave inhibit or contribute to lift? What is the ideal speed to fly near or on the speed of sound while using the ground effect?