Wind Tunnels :: essays research papers

Wind tunnelsIn this report I will take to task about the purloin tunnel. I will described what theyare use for. The different types of wrench tunnels from the slow renovate subsonicto the high speed hypersonic tunnels. I will also give A some examples of thewind tunnels utilize today.The wind tunnel is a whatchamacallit used by many people, from High school studentsto NASA engineers. The wind tunnel is a device used to streak planes to see howwell it will do under veritable conditions. The plane maybe as big as a full size747 or as small as a match. To understand how a wind tunnel is used to help inthe designing process you have to know how a wind tunnel works.How Wind Tunnels WorkA wind tunnel is a work used to fly aircrafts, missiles, engines, androckets on the ground under pre-set conditions. With a wind tunnel you can chosethe air speed, pressure, altitude and temperature to name a few things. A windtunnel is usually has a tube homogeneous appearance with which wi nd is produced by alarge fan to attend over what they are testing (plane, missiles, rockets, etc.)ora model of it. The object in the wind tunnel is fixed and placed in the test subdivision of the tunnel and instruments are placed on the model to record the silky forces acting on the model.Types of Wind TunnelsThere are four sanctioned types of wind tunnels. Which are low subsonic,transonic, supersonic, and hypersonic. The wind tunnels are classified by theamount of speed they can produce. The subsonic has a speed get then the speedof laboured. The transonic has a speed which is about tally to the speed of sound(Mach 1 760 miles per hour at sea level). . The supersonic (Mach 2.75 to 4.96)has a speed of about five times the speed of sound And the fasts of them all thehypersonic (Mach39.5) which has a speed of more then 30,000 miles per hour.Wind Tunnel TestThere are basically two types of wind tunnel test which are staticstability and the pressure test. With these two test you c an determine theaerodynamic characteristics of the aircraft. The static stability test themeasures the forces moments collectible to the external characteristic. These forcesinclude axial, side and normal force, rolling, pitching and yawing moment. Thisforces are fix by using a strain gauge which is located on the externalportion of the plane. It measures the external flow fields. Then the shadowgraphis used to show the shock waves and flow fields at a certain speed or angle of