contributor author | L. Maestrello | |
contributor author | P. Parikh | |
contributor author | A. Bayliss | |
date accessioned | 2017-05-08T23:28:44Z | |
date available | 2017-05-08T23:28:44Z | |
date copyright | October, 1988 | |
date issued | 1988 | |
identifier issn | 1048-9002 | |
identifier other | JVACEK-28979#538_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/104727 | |
description abstract | The growth and decay of a wavepacket convecting in a boundary layer over a concave-convex surface is studied numerically using direct computations of the Navier-Stokes equations. The resulting sound radiation is computed using the linearized Euler equations with the pressure from the Navier-Stokes solution as a time-dependent boundary condition. It is shown that on the concave portion the amplitude of the wavepacket increases and its bandwidth broadens while on the convex portion some of the components in the packet are stabilized. The pressure field decays exponentially away from the surface and then algebraically exhibiting a decay characteristic of acoustic waves in two dimensions. The far field acoustic pressure exhibits a peak at a frequency corresponding to the inflow instability frequency. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Instability and Sound Emission From a Flow Over a Curved Surface | |
type | Journal Paper | |
journal volume | 110 | |
journal issue | 4 | |
journal title | Journal of Vibration and Acoustics | |
identifier doi | 10.1115/1.3269563 | |
journal fristpage | 538 | |
journal lastpage | 544 | |
identifier eissn | 1528-8927 | |
keywords | Sound | |
keywords | Flow (Dynamics) | |
keywords | Emissions | |
keywords | Pressure | |
keywords | Inflow | |
keywords | Radiation (Physics) | |
keywords | Acoustics | |
keywords | Dimensions | |
keywords | Waves | |
keywords | Sound pressure | |
keywords | Navier-Stokes equations | |
keywords | Boundary layers | |
keywords | Boundary-value problems | |
keywords | Computation AND Equations | |
tree | Journal of Vibration and Acoustics:;1988:;volume( 110 ):;issue: 004 | |
contenttype | Fulltext | |