Generation of acoustic waves in a two-dimensional forced shear layer

Jiunn Haur Shaw, Vigor Yang, Shozo Koshigoe

Research output: Contribution to conferencePaperpeer-review


The generation of small amplitude acoustic waves in a two-dimensional forced shear layer is studied numerically. The formulation is based on the concept of the Bernoulli enthalpy. The flowfield is represented by division into two parts: the vortical and the compressible flows. Each field is treated separately and coupled with the other through the Bernoulli enthalpy. Acoustic waves are identified as unsteady compressible motions free of vorticity. Results indicate that the dynamics of the vortical flow plays a decisive role in determining the characteristics of acoustic radiation. The formation of large vortical structures and subsequent dynamic processes act as quadrupole sources. The motions of coherent flow structures contribute significantly to sound generation.

Original languageEnglish
Publication statusPublished - 1987
EventAIAA/ASME/SAE/ASEE 23rd Joint Propulsion Conference, 1987 - San Diego, United States
Duration: 1987 Jun 291987 Jul 2


OtherAIAA/ASME/SAE/ASEE 23rd Joint Propulsion Conference, 1987
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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