It captures the kinetic energy of the wind, and converts the kinetic energy of the wind into electric energy output by using an induction generator or a piezoelectric generator.
What principle is used? Carmen vortex street? Effect is an important phenomenon in fluid mechanics, which is often encountered in nature. Under certain conditions, when the steady flow bypasses some objects, the two sides of the objects will periodically flow out of double-row linear vortices with opposite rotation directions and regular arrangement, and after nonlinear action, Carmen vortex street will be formed.
Speaking of Carmen Vortex Street, there is another real event. 1940, a suspension bridge with a main span of 853.4 meters was built in Tacoma Canyon, Washington, USA. Four months after its completion, it was hit by a strong wind with a speed of 1 19 meters per second on October 7 of the same year. Although the wind was not strong, the bridge deck was tilted to about 45 degrees, and the suspenders were torn off one by one, causing the steel beams on the deck to break and collapse and fall into the canyon. At that time, there happened to be a Hollywood film team filming the bridge on location, recording the whole process of the bridge from the beginning of vibration to the final destruction. Later, it became valuable information for the Federal Highway Administration to investigate the cause of the accident. When people investigate accidents and collect historical data, they are surprised to find that from 18 18.
After the end of World War II, people studied the causes of the wind damage accident of Tacoma Bridge. Von Carmen wrote in 1954, The Development of Aerodynamics, that the destruction of Taco Ma Haixia Bridge was caused by the resonance of a periodic vortex. The designer wants to build a structure called cheap, and use flat plates instead of trusses as side walls. Unfortunately, these plates caused the vortex to be released and the bridge began to torsional vibration. The damage phenomenon of the bridge is caused by the resonance of vibration and vortex release.
Simply put, it is the vibration caused by the change of speed when the fluid passes through obstacles, which makes it generate electricity.