Streamflow and lift for Micro Aerial Vehicles?

In summary, determining streamflow and lift for Micro Aerial Vehicles (MAVs) is more difficult than for larger aircrafts due to the low Reynolds Numbers and the inability to simplify terms of Navier-Stokes equations. This means that molecular viscosity forces cannot be neglected. As for the problems with MAVs, engineers may rely on trial and error due to the complexities of analyzing flow around them. Additionally, aerodynamics do not scale well for MAVs, as explained in an article from a trade magazine.
  • #1
sid_galt
502
1
What are the equations used to determine the streamflow and lift for Micro Aerial Vehicles?

What are the problems with MAVs?
 
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  • #2
As far as I know analyzing flow over MAV's is more difficult than doing that in larger aircrafts. The flow around MAV's has Reynolds Numbers below 100.000 or so, which makes impossible simplify terms of N-S equations. Molecular viscosity forces might not be neglected.
 
  • #3
So when engineers make MAVs, what do they rely on? Trial and Error?
 
  • #4
I don't know, but I haven't seen too many MAV's flying over there.
 
  • #5
Along the same lines, this just came out in one of the trade mags I get. It explains a bit of the issues of why aerodynamics don't scale well. We run into many of the same issues with our engines.

http://www.designnews.com/article/CA513570.html
 
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1. What is streamflow and how does it affect Micro Aerial Vehicles (MAVs)?

Streamflow refers to the movement of air or water in a specific direction. For MAVs, streamflow can affect their lift by providing an opposing force to the MAV's weight. The direction and velocity of the streamflow can also impact the stability and control of the MAV during flight.

2. What factors influence the streamflow around an MAV?

The size, shape, and weight of the MAV can influence the streamflow around it. Other factors include the air density, temperature, and humidity of the environment in which the MAV is operating. The MAV's speed and direction of flight can also affect the streamflow around it.

3. How is lift generated for MAVs?

Lift is generated for MAVs through the Bernoulli's principle, which states that the pressure of a fluid decreases as its velocity increases. In the case of MAVs, the streamflow over the MAV's wings creates a lower pressure on the top surface of the wings, causing the MAV to lift off the ground.

4. Can streamflow be manipulated to improve the lift of MAVs?

Yes, streamflow can be manipulated through various techniques such as wing design, altering the angle of attack, and using control surfaces. These methods can help increase the lift of MAVs and improve their flight performance.

5. How does streamflow affect the flight time and range of MAVs?

The streamflow around an MAV can impact its flight time and range by affecting its lift and stability. If the streamflow is not favorable, the MAV may require more energy to maintain flight, leading to a shorter flight time and range. It is essential to consider streamflow conditions when designing MAVs for longer flight times and ranges.

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