Device provided with a gas flow channel to reduce noise caused b

Details Device provided with a gas flow channel to reduce noise caused b Device provided with a gas flow channel to reduce noise caused b

1995-03-08

1997-01-07

Scherbel, David

Pipes and tubular conduits

With flow regulators and/or baffles

Flow facilitating

138 44, F15D 102

Patent

active

055906885

ABSTRACT:
A method and a device for reducing the noise caused by throttling a gas flow in a flow channel (1), where after the throttling part (2) there is a wider part (3). The wider part (3) following the throttling part (2) of the flow channel (1) has at least one deviation of the cross-section (D) formed by a wall protrusion (5) in a short part (1) of the channel. The cross-section of the channel wall protrusion (5) taken length-wise of the channel tapers towards the central part of the channel. In a trans- or supersonic flow the protrusion causes a straight shock wave, a so-called Mach disk, in the flow, and this disk is made to occur and to remain within a wide pressure drop ratio range.

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