【基調講演】CFDを用いた流体騒音予測技術の現状(OS-6)

概要

論文の詳細を見る
The aerodynamic sound generated from cylinders with three different cross-sections (●,■,◆) at Reynolds number of 20000 are predicted by use of acoustic analogy method that is based on Curle's equation. In this case, the sound source is evaluated by the two- and three-dimensional CFD techniques. As a result, the predicted values of sound pressure are in reasonable agreement with the experimental ones. Moreover, the relative comparison of the aerodynamic sound due to the various cross-sections can be discussed by this method. And the intensity and the directivity of the aerodynamic sound generated from a plate having semicircular edges are also investigated by wind tunnel experiments and numerical analyses. Numerical analyses for various thickness plates are carried out to be compared with experimental data. A combined method which consists of a two-dimensional CFD code and a two-dimensional acoustic code based on the Lighthill's equation is used. As a result, the calculated sound fields are qualitatively in reasonable agreement with the experimental ones.
社団法人日本機械学会の論文
2001-03-16