Structural and acoustic noise sources due to turbulent flow through an elbow - Formulation of analysis methods

Stephen A. Hambric, L. Joel Peltier, David A. Boger, John B. Fahnline, John E. Poremba

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations

Abstract

The low-frequency structure- and fluid-borne noise from elbows excited by fluctuating forces within turbulent fluid flow is investigated. Computational Fluid Dynamics (CFD) Reynolds Averaged Navier Stokes (RANS) analyses of the flow through a piping elbow with a radius to diameter ratio of 2.8 compare favorably to measurements made by previous investigators. The CFD RANS solutions are post-processed to estimate the spectra of the fluctuating wall pressures beneath the turbulent boundary layer (TBL) flow. The CFD RANS solutions are also used to identify regions within the core flow that might excite acoustic modes within the piping fluid. A finite element (FE) model of the piping walls is coupled with a boundary element (BE) model of the interior acoustic fluid and is excited by the fluctuating wall and fluid forces estimated from the CFD RANS solutions. The power transmission through the inlet and discharge ports of the elbow is computed and separated into its structure-borne and fluid-borne components. The influence of both structural and acoustic resonances on the power transmission is evident for both excitation mechanisms. The power transmission curves at the elbow ports may be used as source inputs to transfer matrix models of piping systems that contain elbows.

Original languageEnglish (US)
Pages69-80
Number of pages12
DOIs
StatePublished - Jan 1 2003
Event2003 ASME International Mechanical Engineering Congress - Washington, DC., United States
Duration: Nov 15 2003Nov 21 2003

Other

Other2003 ASME International Mechanical Engineering Congress
CountryUnited States
CityWashington, DC.
Period11/15/0311/21/03

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Acoustics and Ultrasonics

Fingerprint Dive into the research topics of 'Structural and acoustic noise sources due to turbulent flow through an elbow - Formulation of analysis methods'. Together they form a unique fingerprint.

Cite this