Questions tagged [aerodynamics]

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What happens when the surface ends at the laminar zone of the boundary layer?

When a body travels through any fluid(like aircrafts and cars), due to viscosity of the fluid a boundary layer is formed around the surface of the body which separates the velocity of the fluid inside ...
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3answers
101 views

Formula (or heuristic) for calculating force required for incremental change in angle of attack of an airfoil

Assume I have a system comprising of an airfoil A immersed in a fluid. Further assume, that the airfoil is affixed via two bolts at one end, and is untethered at the other end. The system can be ...
2
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1answer
84 views

Whats the difference between leading edge and slat?

According to this figure whats the difference between leading edge flap and slat and why the slat come with plain wing and TE flap come alone? thanks.
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1answer
34 views

What are some concepts I can look into to aide in creating a 'compression funnel'(?) without the aide of a motor? [closed]

In short I'm designing a 'Humane fly swatter' for my University application into bachelor of Industrial Design. The idea is to utilise the energy of swatting a fly to capture air through an intake, ...
5
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3answers
3k views

Can air suction be increased by consecutive pc fans in small air tunnel?

I want to make a small air filter using standard axial pc fans in order to suck smoke like that have been produced in soldering process. But I assume filtering will make it difficult. Am i wrong? ...
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2answers
102 views

How to determine the banking angle of a quadcopter/helicopter due to unbalanced load along the X-axis?

What theories/equations can be used to determine the banking angle of a quadcopter/helicopter due to unbalanced load, given that the load will only shift along the X-axis
0
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1answer
793 views

Simple, open source aerodynamics simulation software that can import Blender or Sketchup models? [closed]

What are some basic, open source aerodynamics or CFD simulation software that can import Blender or Sketchup models? I am looking for software that is easy-to-use, free, and suitable for educational ...
3
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3answers
851 views

What is the area when calculating the drag coefficient for a race car wing?

The drag coefficient is given by the following expression $$C_d = \frac{2F_d}{\rho v^2 A}$$ For a race car wing (which is simply an airplane wing upside down to generate downforce), what should we ...
5
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3answers
389 views

Questions about the level flight lift equation

In level unaccelerated flight we have relation $$ W=L=\frac{1}{2}\rho\cdot V_{stall}^2\cdot S\cdot C_{l,max} $$ taken from book Daniel P Raymer "Aircraft Design: A Conceptual Approach" equation (5.5) ...
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1answer
262 views

Aerodynamical forces - downforce

I have heard that car weight (for more friction = more stability and higher traction) is being increased when driving by a force called aerodynamic down-force which causes additional force on the car ...
8
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1answer
264 views

How to design the most hydro/aerodynamic shape for a 'vehicle' that goes back and forth (using ANSYS)?

I am interested in making a very small scraper blade that moves back and forth along a submerged surface, however I need to make it as hydrodynamic as possible so I disturb the liquid as little as ...
2
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2answers
123 views

Guiding a parachute via anchor: Possible?

Here's my situation: I'm trying to drop a payload via parachute with some accuracy. I'm worried that in the above setup, the line will interfere with parachute deployment or - if not deployment - ...
5
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1answer
464 views

What is “Bernoulli-Lift”, and why does it only account for 20% of an airplane's lift?

Whenever the question "Why do airplanes fly?" is asked (e.g. »What really allows airplanes to fly?«, »How an airfoil works?«) at a certain point the following is cited: Bernoulli's principle ...

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