A METHOD FOR PRODUCING PRESSURE PULSES IN A MASS OF GAS AND A DEVICE FOR PERFORMING THE METHOD

摘要

The invention concerns a method for producing selectively controlled pressure pulses in a mass of gas (1), in particular contained in a space (27) of large dimensions. In order to achieve a sufficiently high power in the pulses these are generated by a valveless displacement machine (2), in which the pressure when the machine (2) opens towards its outlet port, differs from the pressure of the mass of gas. The pulse is generated as the working fluid, due to said pressure difference, at high velocity flows through the outlet port (23). An acoustic power of the generated pulses of up to 20 kW can be attained by the method. The invention also concerns a device for performing the method.