The relationship between wind speed, wind pressure and wind resistance

Wind pressure = the square of the wind speed divided by 1600, that is, wp = v2/1600

Q=60VA

Q (air volume) =m^3/min

V (wind speed) = m/sec

A (cross-sectional area) = m^2

Common pressure conversion formula 1Pa=0.102mmAq

Wind speed has no grades, only wind power has grades. Wind speed is the basis for wind power classification. Generally speaking, the greater the wind speed and the higher the wind level, the more destructive the wind is.

In weather forecasts, we often hear terms such as "North wind level 4 to 5", and the wind force referred to at this time is the average wind force; for example, we hear terms such as "gust level 7". In terms of wind gust, it refers to the wind speed that changes from high to low, and the wind force at this time refers to the strong wind force.

In fact, in nature, the wind force sometimes exceeds level 12. For example, the wind force at the center of a strong typhoon or the wind force of a tornado may be much stronger than level 12. However, strong winds above level 12 are relatively rare, and generally the level is not specified.

Extended information:

Air gravity and gravitational acceleration vary with latitude and altitude. Generally speaking, ρ is smaller on the plateau than in the plain area. That is to say, the same wind speed and the same temperature will produce less wind pressure on the plateau than in the plain area.

When a vehicle is traveling at high speed, external resistance is the main source of air resistance. The resistance caused by the appearance comes from the vacuum area behind the car. The larger the vacuum area, the greater the resistance. Generally speaking, the appearance resistance of a three-box RV will be smaller than that of a hatchback SUV.

When a vehicle is driving, the resistance it has to overcome includes parts loss resistance, rolling resistance generated by tires (generally also called road resistance) and air resistance. As the vehicle speed increases, air resistance gradually becomes the most important driving resistance. When the speed is above 200km/h, air resistance accounts for almost 85% of all driving resistance.

Baidu Encyclopedia--Wind Speed

Baidu Encyclopedia--Wind Pressure

Baidu Encyclopedia--Wind Resistance