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Can I read On The Acoustics Of Low Mach Number Bulged, Throated And Baffled Nozzles on EtoBox?
On The Acoustics Of Low Mach Number Bulged, Throated And Baffled Nozzles by L.M.B.C. Campos; F.J.P. Lau is a Engineering article available to read on EtoBox.
What is On The Acoustics Of Low Mach Number Bulged, Throated And Baffled Nozzles about?
The acoustic wave equation, for quasi-one-dimensional propagation, along a duct of varying cross-section, containing a low Mach number mean flow, is obtained (Section 2), by using as variables either the potential or the velocity (Section 2.1); the ray approximation, that holds only for wavelengths which are short compared with the length scales of the variation of the cross-section and mean flow velocity, is used as a factor to reduce the wave equation to a Schro ̈dinger form (Section 2.2). It is shown that the latter, reduced form, for the potential, is the most convenient for studying the acoustics of catenoidal (Section 2.3) and sinusoidal (Section 3.1) nozzles; it is found that these inherit respectively the filtering properties of catenoidal horns, and transparency properties of sinusoidal horns. This approach also applies to the exponential nozzle (Section 3.3), whereas for the Gaussian nozzle, the sound field can be expressed in terms of Hermite functions, by using a semi-reduced form (Section 3.2) of the wave equations. The exact solutions of the nozzle wave equation (Section 3), for the four families of ducts, are plotted (Section 4) as amplitude and phase versus distance
Who reads On The Acoustics Of Low Mach Number Bulged, Throated And Baffled Nozzles?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- L.M.B.C. Campos; F.J.P. Lau
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0022-460X)
- Published
- 1996
- Language
- EN
- Field
- Engineering (Physical Sciences)