Parallel computation of forward radiated noise of ducted fans with acoustic treatment

Ozyoruk Y.

AIAA JOURNAL, vol.40, no.3, pp.450-455, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 3
  • Publication Date: 2002
  • Doi Number: 10.2514/3.15082
  • Journal Name: AIAA JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.450-455
  • Middle East Technical University Affiliated: Yes

Abstract

Forward radiated noise of ducted fans is computed numerically on parallel processors solving the three-dimensional, time-dependent Euler equations in body-conformed coordinates with a fourth-order-accurate, finite-difference, Runge-Kutta time-integration scheme. Sound attenuation effects of inlet wall acoustic treatment are included in computations employing a time-discrete form of the standard impedance condition. A distributed computing approach with domain decomposition is used for integrating the equations in parallel using the message passing interface library routines. The abilities of the method are demonstrated with hard- and soft-wall simulations of the JT15D inlet, including flow effects.