Abstract
To generate dynamic pressure precisely at low- and medium-pressure levels and in a low-frequency range, we have developed a square-wave pressure generator using a novel rotating valve. The main features of the valve are chambers in the rotor and grooves inside the stator. Pressurized air from two sources is continuously supplied to each chamber through the grooves. The valve switches the pressure alternately by its rotation, producing square-wave pressure. The amplitude and fundamental frequency of the generated pressure can be changed arbitrarily. The measured waveform is a periodic well-shaped square wave. The experimental results show that the repeatability of the system is good for a dynamic pressure source.