High frequency diffusion muffler for gas jets

Details High frequency diffusion muffler for gas jets High frequency diffusion muffler for gas jets

F - Mech Eng,Light,Heat,Weapons

01

N

172/22

F01N 1/24 (2006.01) F16L 55/027 (2006.01)

Patent

CA 1079198

HIGH FREQUENCY DIFFUSION MUFFLER FOR GAS JETS Abstract of the Disclosure A dissipative-type muffler for attenuating the high velocity discharge of a high pressure-high temperature safety valve. A path of flow constituting four stages of controlled turbulence suppressed diffusion is formed internally of the muffler extending from an intake into a plenum chamber then dis- tributed past a plurality of parallel arranged radial diffuser flanges and an acoustical liner before exiting to atmosphere at relatively low velocity and low noise level. Laminar flow to small scale turbulence is obtained in the first stage by a jet impingement directional reversal in a controlled spacing discharge from an intake pipe within the plenum chamber. In the second stage, small scale discharge turbulence of high fre- quency is achieved by laminar flow induced via radial diffusion through controlled gap spacings between the diffuser flanges. Buffer plate impingement of the second stage discharge is then effected in the third stage after which high frequency noise attenuation by means of an acoustical composition is obtained in the fourth stage before exiting to atmosphere.

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