Low-speed Circulating Wind Tunnels

Axial fans produce airflow through the wind tunnel. As air flows through the wind tunnel, air flows through the honeycomb structure, the screen, the waist portion, the diffuser and the test portion. However, the addition of a circulation duct increases the size of the wind tunnel. Although the space is limited, the test part may be smaller than the test part of the open wind tunnel. However, the use of a square tube as the test part encounters several problems due to the growth of the boundary layer in the wall of the test part.

As the condensed air continues to circulate, the wind speed picks up and circulates around the eyes of the storm. When the wind speed reaches 74 mph, the tropical cyclone will formally become a tropical cyclone (or a hurricane). The wind speed of the hurricane actually determines the extent of the potential damage of tropical storm. In fact, there are five types of storms: 74-95 mph is the lowest (level 1), 111 - 129 high (level 3), 157 and above means that devastating damage is expected at landing . (Level 5) Although hurricanes generally weaken when reaching land, while hurried waters continue to move inland because of the lack of energy, they hurt a few inches of rain and cause massive wind damage, It then disappears completely. For this reason it is important to plan a well-thought out hurricane plan for families, pets, families, and businesses before the storm is hit.

Hurricanes are usually tropical cyclones occurring in the Atlantic Ocean, with cycles of thunderstorms and counterclockwise winds. A hurricane is a strong wind, and it will apply a pressure of at least 70 kg / m 2. Wind speed causes pressure and suction. Pressure increases with wind speed. Wind power exacerbates wind pressure and may cause fatigue in building materials subject to stable stress.  High wind - strong winds can destroy inappropriately constructed buildings and houses. The wind direction affects the damage rate. The fragments blown by the wind increase the destructive possibilities of the wind. Scattering debris can cause death or damage. Even with strong winds, there is a possibility of fire, fire including fire, or damage. Longer wind stress is more likely to cause structural damage