The influence of wind-tunnel walls on discrete frequency noiseThis paper describes an analytical model that can be used to examine the effects of wind-tunnel walls on discrete frequency noise. First, a complete physical model of an acoustic source in a wind tunnel is described, and a simplified version is then developed. This simplified model retains the important physical processes involved, yet it is more amenable to analysis. Second, the simplified physical model is formulated as a mathematical problem. An inhomogeneous partial differential equation with mixed boundary conditions is set up and then transformed into an integral equation. The integral equation has been solved with a panel program on a computer. Preliminary results from a simple model problem will be shown and compared with the approximate analytic solution.
Document ID
19850028686
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mosher, M. (NASA Ames Research Center Moffett Field, CA, United States)