All Questions
Tagged with aerospace-engineering fluid-mechanics
44
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How does one calculate the aerodynamic pressure on a spacecraft during Max Q?
Just as lift - off of a spacecraft commences, that spacecraft undergoes aerodynamic pressure. After a certain point, the spacecraft reaches Max Q or maximum aerodynamic pressure. I do know that Max Q ...
- 101
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Why do wing-tip vortices cause an induced angle of attack upstream?
My question is the following. Wing-tip vortices induce a downward flow on the root side of the wing. So, if this induction happens at the wing, and these vortices are then shed downstream, why is ...
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1
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Why do trailing edge flaps increase the CL,max of a wing?
I was wondering why do trailing edge flaps increase the lift co-efficient for a given angle of attack. I am guessing it has something to do with delayed flow separation, but this is quite unintuitive, ...
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2
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Wind Load on conical structure
Is there a way to calculate the wind load acting on this conical cylinder?
The wind pressure blowing through the hollow conical cylinder is at 30 bar. The conical cylinder is tilted at 10 degree ...
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2
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228
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How does stalled diffuser/wing reduce drag at F1 car?
How stalled diffuser/wing reduce drag at F1 car if in aerodynamics stall/separation is always related to increase in drag?
Any graph of pressure distribution when diffuser is stalled?
From "...
- 239
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20
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How to estimate air velocity at turbine in turbojet?
I am designing a small turbojet. I wanted to know how to calculate the air volume expansion to predict the outlet velocity of air towards the turbine. Theoretically, I wouldn't know the flame ...
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Help relating thrust to angular velocity of helicopter in hover
Given a system consisting of an engine and propeller, I want to determine the maximum thrust it will produce when in stationary hover (no forward velocity) above the ground, and what angular velocity ...
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Saturation of penetration length using Lucas-Washburn equation
The Washburn equation for capillary flow provides the following expression for the calculation of the penetration depth (or capillary rise):
$L \propto \sqrt(t)$
My question is when t goes to infinity,...
- 151
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How Does The Aerodynamics Of This Hanging Rotating Wing VAWT Turbine Function?
We are examining videos of this very fast rotating "hanging VAWT" shown on Youtube:
https://youtu.be/O2MZsK0mvBk
https://youtu.be/7hVQ_rVNRUI
It say in the text description that "...
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2
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Airflow visible over the airplane wing
What's that visible airflow over the airplane wing and what causes it?
- 395
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116
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What aerodynamic equation should be used to determine the drop in air pressure over an airfoil embedded within a vertical pipe?
I have a conceptual idea for a thruster for a VTOL aircraft/drone which should produce lift by utilizing a upward-flowing airflow to produce low air pressure over the top surface of an airfoil that is ...
- 303
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87
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Kelvin's Circulation theorem applied to a cup of tea
Recently, I dipped my spoon into my tea. I saw that as I dipped my spoon into my tea, two vortices formed at both edges of the spoon. I guess this is similar to vortices forming at the end of ...
- 3
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Convert from mm of water to Coefficient of pressure (Cp) [closed]
Okay,
I have this value in mmH2O (2.650) and am not sure where to go next to convert it to aerodynamic parameter pressure coefficient please?
mmH2O * 9.8066 = N/m2
???? What do do next please?
I ...
1
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0
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103
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Stokes Number (characteristic length)
I am working with a high speed flow that is non-stokesian, but that isn't the issue. There are correction factors for that. I am attempting to figure out what value to use for the "characteristic ...
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Will high velocity air directed underneath a half-toroid shaped Coanda saucer by a centrifugal impeller create a lifting force?
I would like to know if a lifting force will be created by the Coanda effect from high velocity air that is directed underneath a half-toroid shaped saucer by a centrifugal impeller.
I am seeking an ...
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