Abstract
In our previous work, a technique which utilizes a single pressure history from the pressure transducer was proposed to obtain a local Mach number of shock wave propagating in a pipe. In this technique, however, it is assumed that a sensitive head of the pressure transducer is infinitesimal in diameter. Additionally, the strain which is measured at a certain point on a diaphragm of the sensitive head is regarded as the output of the pressure transducer. These assumptions influence accuracy of the scheme. In this study, in order to improve the accuracy dynamic response of the diaphragm is experimentally analyzed. As a result, it is found that not only a posision but also a direction of the strain gauge on the diaphragm greatly affects the initial oscillation of pressure history when a shock wave reaches the pressure transducer.
