Aerodynamics - Laminar and Turbulent Flow
10 important questions on Aerodynamics - Laminar and Turbulent Flow
How would you describe a boundary layer?
What can you say about the pressure through the boundary layer in a direction perpendicular to the surface?
What can you do if you know that the pressure is constant through the boundary layer?
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Why is this velocity profile excisting?
Friction force is shear stress
μ = absolute viscosity coefficient or viscosity (kg/ms)
The steaper the gradient of the profile close to the surface, the smaller the τw
What is the critical Reynoldsnumber?
It is difficult to find --> Experimental data applicable for the given problem
But not every windtunnel ha
What does it mean if the Reynolds number is high?
When is the shear stress on an airfoil high? And when low?
Turbulent boundary layer --> high shear stress
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What does the black region mean?
What happends if the adverse pressure gradient becomes too high?
they move with the incomming flow
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How can you see that the flow has seperated?
Transition also moves forewards.
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