This technique is used to measure the local flow velocities and turbulence values mainly when physical interference with the flow must be avoided. It is, therefore, particularly suitable, for instance, for the measurement of boundary layers on a car surface.
Moreover, the intrinsic characteristics of this technique (i.e. capablity of measuring unsteady flows as well as low velocities, down to 'zero'), together with the very small size of the end-probe, make this instrumentation particularly suitable to measure the flow under the bonnet, in the engine compartment. These measurements can be necessary to understand local over-heating problems of electronic components installed under the bonnet or to validate the results of CFD simulations in the engine compartment.
Examples of these measurements are shown in the following figures.