Laservibrometrie

Laservibrometrie is a non-contact measurement technique used to determine the velocity and direction of air flows. The method employs a laser Doppler technique, which involves illuminating a small volume of air with a coherent laser beam. When the air flows past a reference point, the light scattered from particles in the air is shifted in frequency due to the movement of the particles. This phenomenon is known as the Doppler effect.

A laser vibrometer, a device used in laservibrometrie, measures the frequency shift of the scattered light and calculates the velocity of the air flow based on the direction of the Doppler shift. By analyzing the frequency shift of the scattered light in different directions, it is possible to determine the velocity and direction of the air flow.

Laservibrometrie is commonly used in a variety of applications, including aerodynamics, acoustics, and fluid dynamics. In aerodynamics, it is used to study airflow around objects, such as models of aircraft and wind turbines. In acoustics, it is used to measure sound velocities and study the propagation of sound waves. In fluid dynamics, it is used to study the behavior of fluids, such as ocean currents and atmospheric flows.

The advantages of laservibrometrie include its non-invasive nature, high accuracy, and ability to measure flow velocities at high speeds and low Reynolds numbers. However, the technique requires a quiet and stable environment to operate effectively, and it is sensitive to the presence of particles in the air. Despite these limitations, laservibrometrie has become a widely used and important tool in many fields of science and engineering.