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HondaJet

Description and Structure

A wind tunnel or wind tunnel is an experimental tool to study the effects of air flow over objects or solids.

is a tube-shaped facility that circulate air around a mass of solid or considered.

There are 2 types of wind tunnels: The open and closed.

Open Tunnel

Air enters

from outside to inside the tunnel, and once again it has come to go outside.

tunnel opened

Parties:

Chamber of establishment: Its purpose is to straighten out and standardize the flow of air. Cone
acceleration: Its function is to compress and accelerate air flow rate to drive to the test chamber.
Chamber of tests: Place where the model we want to study and where measurements are made.
Diffuser: Once the air has left the test chamber, the diffuser reduces the flow rate through divergent profile. We are interested in the air out at the slowest speed possible because the output rate will be related to the energy losses of the tunnel. At lower speeds, the smaller the losses.
Fan: It is the force that drives the airflow.

Tunnel Closed

Unlike previous closed tunnel recycles the air so be controlled cyclically allowing air thermodynamic variables: density, temperature and pressure. This type is more complex and expensive because you have to install a series of baffles along the tunnel to help control the flow and avoid turbulence.

Other

Depending on their size: There are wind tunnels for provar small scale models and there are huge tunnels that are capable of holding up a real plane as the National Full- Scale Aerodynamics Complex (NFAC) spacecraft.

real F/A-18 giant tunnel (NFAC)

Depending on the speed to reach:

Subsónco Tunnel (Mach \u0026lt;1)
Transonic Tunnel (Mach = 1)
Supersonic Tunnel (Mach> 1)
Hypersonic Tunnel (Mach> 5)

Depending on how you drive the air:

Blowing: The fan in front of the model, provides more speed but the flow becomes turbulent.

Vacuum: The fan is located behind the model, provides less speed but the flow is laminar.

There are also a type of wind tunnel verticle willing to train paratroopers.

How are the measurements?

During

aero test various techniques used to analyze the data collected, mainly processed by computer through a technology known as Computational Fluid Dynamics. There are also

flow visualization techniques such as:

threads can join the study area to detect the direction of air flow and its relative speed.
dyes can be injected or smoke in the air flow to observe the movement of particles passing through the surface.
probes can be inserted into specific points of air flow to measure static or dynamic pressure of the air.

What models are tested?

in wind tunnels is experienced mostly with cars and airplanes, especially in Formula 1 where aerodynamics is crucial to set the car in top condition for the race. However, in wind tunnels are also tested cyclists, skiers, swimmers and even birds and insects to study their flight.