초록 ▼

An apparatus and method is provided for venting high pressure gas to a lower pressure region with a minimum of noise. A high pressure vent valve controls egress from a high pressure gas source. In order to limit the generation of noise downstream of the vent valve, at least one control orifice is pr

An apparatus and method is provided for venting high pressure gas to a lower pressure region with a minimum of noise. A high pressure vent valve controls egress from a high pressure gas source. In order to limit the generation of noise downstream of the vent valve, at least one control orifice is provided which is configured to have a flow velocity through a throat section thereof of the speed of sound, and with a pressure downstream of the throat being the same as the throat pressure. In this manner, the pressure is reduced by about half at each control orifice, with no or little noise generation. Downstream of these sonic velocity control orifices, sound attenuating means including radially extended passages lined with sound-baffling structure are provided to reduce any residual noise in the flowing gas as it passes into the region of lower pressure.

대표청구항 ▼

High pressure gas vent noise control apparatus for controlling the noise emitted during venting of gas from a high pressure region to a low pressure region via a high pressure vent valve at the high pressure region; said apparatus comprising: a tubular member and a plurality of control orifices posi

High pressure gas vent noise control apparatus for controlling the noise emitted during venting of gas from a high pressure region to a low pressure region via a high pressure vent valve at the high pressure region; said apparatus comprising: a tubular member and a plurality of control orifices positioned longitudinally spaced from each other within said tubular member, said control orifices being configured and disposed such that vented gas passes therethrough with sonic velocity being attained at a respective throat of each of said orifices and the pressure downstream thereof is stepwise reduced relative to the pressure upstream thereof, and flow control means downstream of said control orifices for controlling the discharge of said gas to said low pressure region.