Calibration of te Normal Pressure Transfer Function of a Compliant Fluid-Filled Cylinder
Patent, Filed 29 May 97, patented 7 Sep 99
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A method is presented to calibrate the transfer function for a fluid-filled compliant cylinder as a function of wave number and frequency. An air-filled compliant cylinder has a first linear array of force sensors coupled to the cylinders exterior surface. A turbulent flow field is generated in a fluid environment about the first linear array which generates an output indicative of pressure incident thereupon. A fluid- filled compliant cylinder identical in diameter to the air-filled compliant cylinder houses a second linear array of force sensors. A similar turbulent flow field is generated in the fluid environment about the fluid-filled complaint cylinder to generate an output indicative of pressure incident upon the second linear array. The ratio of outputs is indicative of the transfer function of the fluid-filled compliant cylinder Each output can be further adjusted by a calibrated sensitivity of the corresponding first and second linear arrays. The method compensates for elastic scattered pressure fields and the wave number frequency dependence of the air-filled compliant cylinders sensitivity to pressure.
- Test Facilities, Equipment and Methods