The place where the wind blows first is in the upwind direction, and the place where it blows later is in the downwind direction. It can also be said that the direction of wind blowing is the headwind direction, and the wind blows from the headwind direction to the downwind direction.
Headwind direction in wind power generation system: the type of fan in which the wind blows through the impeller first and then the tower.
Extended data:
Wind direction refers to the direction of the wind, and the maximum wind direction refers to the wind direction with the most frequency in a specified time period. Manual observation, wind direction with 16 direction method; Automatic observation, the wind direction is in degrees (degrees). Wind speed refers to the horizontal distance of air movement per unit time.
Wind speed is measured in meters per second (m/s) with 1 bit after the decimal point. The maximum wind speed refers to the maximum average wind speed within a certain time 10 minute. The maximum wind speed (gust) refers to the maximum instantaneous wind speed in a certain period of time.
Instantaneous wind speed refers to the average wind speed of 3 seconds. The average wind power refers to the average value in a specific time period, including 3 seconds, 2 minutes, 10 minutes.
References:
Wind direction-Baidu encyclopedia