Silencer Design
Silencer Design
(OP)
Does anyone have any tips re designing a silencer(s) for a rotary piston (roots) type blower?
The silencers need to be relatively compact but still facilitate high gas flow (3500 cfm). Blower outlet is 10", frequency is ~240Hz (est.).
I am thinking of installing 2 silencers in series, one reactive (using baffles) and one absorptive (with deadening material). I am also looking into the possibility of incorporating a Helmholtz Resonator in the design.
Any advice will be welcome as I am very new to this.
Thanks.
Shane.
shanev@themutual.net
The silencers need to be relatively compact but still facilitate high gas flow (3500 cfm). Blower outlet is 10", frequency is ~240Hz (est.).
I am thinking of installing 2 silencers in series, one reactive (using baffles) and one absorptive (with deadening material). I am also looking into the possibility of incorporating a Helmholtz Resonator in the design.
Any advice will be welcome as I am very new to this.
Thanks.
Shane.
shanev@themutual.net





RE: Silencer Design
When installing silencers on a rotary blower, the operating pressure is important. Is the silencer on the discharge side or intake side? If it is on the discharge side, then it may require "pressure vessel" certification and/or ACME flanges (higher cost). It is usually cheaper to purchase a reactive silencer (or any large silencer) rather than design and build a unit.
One other thing, the first chamber of a reactive silencer usually sees very high pressure, and velocity. It must be robust to withstand the pressure and corrosion (if there is some moisture in the flow stream).
RE: Silencer Design