Point collocation scheme in silencers with temperature gradient and mean flow

作者：

Highlights：

• Sound attenuation in perforated dissipative silencers including temperature gradients and mean flow is computed.

• A two-dimensional finite element eigenvalue problem is solved for a silencer cross section with transversal thermal variations.

• A point collocation scheme is presented to match the acoustic pressure and axial velocity at the silencer geometrical discontinuities.

• A significant reduction in the computational requirements is obtained compared to a full three-dimensional finite element approach.

摘要

•Sound attenuation in perforated dissipative silencers including temperature gradients and mean flow is computed.•A two-dimensional finite element eigenvalue problem is solved for a silencer cross section with transversal thermal variations.•A point collocation scheme is presented to match the acoustic pressure and axial velocity at the silencer geometrical discontinuities.•A significant reduction in the computational requirements is obtained compared to a full three-dimensional finite element approach.

论文关键词：Dissipative silencer,Temperature gradient,Mean flow,Point collocation

论文评审过程：Received 15 October 2014, Revised 14 January 2015, Available online 12 February 2015, Version of Record 15 August 2015.

论文官网地址：https://doi.org/10.1016/j.cam.2015.02.007