P42 - PVDF Sensor Array for Unsteady Wall-Pressure Measurements in Shockwave-Boundary Layer Interactions Application

Abstract

This paper presents the development and 3D integration of a PVDF piezo-film sensor array for unsteady wall-pressure measurements in a turbulent SBLI (Shockwave-boundary layer interactions). The sensor array is developed and tested inside the supersonic wind tunnel in an SBLI configuration. The sensor array is large and have no obstacles on the surface. The sensor system has been 3D integrated and no bond wires are needed. With this type of large area sensor array several local pointwise measurements can be taken without disturbing the flow field. The dynamic wall-pressure field of a turbulent SBLI at Mach 2 is measured and displayed. The obtained results show good agreement with other studies present in literature. The PVDF setup is compared with the standard state-of-the-art sensor used for unsteady pressure measurements, a reference piezoresistive transducer, highlighting the good qualities of the proposed sensor.