Aiming at the problems of large size

low frequency response and arousing disturbance to the flow field that most present liquid pressure sensors have when detecting flow field pressure of narrow space

a PVDF film-based flow field dynamic pressure detection method is proposed.Directly fabricated from an aluminum-coated PVDF film using lithographic process

the sensing element implemented in this method has been endowed with the advantages of small size

thin thickness and good flexibility

which make it applicable for the wall pressure distribution measurement for narrow gap flow field.Experimental research shows that this method is well suitable for the slight pressure fluctuation detection in the flow field

with a linearity error of ±2.3% and a sensitivity of 1.32mV/Pa.