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The velocity field near the orifice of a helmholtz resonator in grazing flow
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Walker, B. E. Charwat, A. F. |
| Copyright Year | 1981 |
| Description | Measurement of the time-dependent velocities induced inside and outside the opening of acoustically excited, two-dimensional Helmholtz resonator imbedded in a grazing flow are presented. The remarkably clear structure of the perturbation field which evokes a pulsating source and a coherently pulsating vortex-image pair is described. The simple phenomenological "lid-model" which correlates the variation in the components of the acoustic impedance with the velocity of the grazing flow is discussed and extended. |
| File Size | 3286755 |
| Page Count | 56 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820011120 |
| Archival Resource Key | ark:/13960/t7fr4q26b |
| Language | English |
| Publisher Date | 1981-03-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Helmholtz Vorticity Equation Time Dependence Turbulent Flow Orifices Shear Flow Flow Velocity Grazing Flow Velocity Measurement Resonators Boundary Layer Flow Acoustic Impedance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
