Aerodynamics
Multi-hole probes (MHB) are robust and reliable tools, relatively easy to use and most appropriate for measurements in wind tunnels. They provide all three components of the flow velocity, as well as static and dynamic pressure at the point of measurement. No other method can provide this type of information. MHB generate average information. But fast-response probes are available that can measure these quantities with a frequency response of 2 to 3 kHz. These probes must be inserted in the flow at the point where a measurement is required. They therefore provide point measurements.
Other methods are available for laboratory measurements like Hot-Wire Anemometry (HWA), Laser-Doppler Velocimetry (LDV) and Particle-Image Velocimetry (PIV). HWA and LDV are also point instruments, whereas PIV can generate information along a plane cutting across the velocity field of consideration. Of all these methods the hot wire anemometer is the most vulnerable to particulates in the flow and can easily be damaged if not handled properly. It is therefore not appropriate for industrial applications. LDV and PIV require optical access to the point of measurement, and elaborate seeding hardware, which makes them difficult to use.
Aeroprobe probes have been used to calibrate tunnels. This process requires traversing the probe across the entire volume of the test section, recording the inclination and magnitude of the flow. Probes have been used to monitor the flow over wings, bluff bodies and other aerodynamic surfaces. Any probe inserted in the flow will interfere with the flow. For example, the introduction of a small disturbance near the separation point has the potential of swinging the flow from fully separated to fully attach and vice versa. And placement of the probe in the core of an axial vortex may induce vortex breakdown.
Aeroprobe products have been used by companies including Boeing, Lockheed, Air Bus; government labs including NASA, Hill Air Force Base; academic labs including MIT, Texas A&M University, Virginia Tech, University of Central Florida, Technical University of Athens, and others. Examples of such use can be found by clicking on the icons on the right.
