THE MECHANICAL IMPEDANCE ADDED TO THE WALLS OF A CAVITY RESONATOR BY THE INSIDE AND OUTSIDE LIQUID MEDIUM
Abstract
The boundary-value problem corresponding to the idealized model of the soft-bottom, unidirectional, squirter-type underwater sound generator of length L, and radius a is formulated by prescribing a terminal radiation impedance and then seeking the cavity proportions needed to yield maximum volume velocity. For a prescribed squirter wall velocity a formula for the axial velocity is derived in terms of this terminal impedance. The axial velocity is maximized by selecting ka less than 3.83, and a/L equals 2/pi times the ratio of the speed of sound in the equirter wall material to the speed of sound of the liquid in the cavity. Comparison of these formulas with experimental data is left for a later report. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 05, 1961
- Accession Number
- AD0268837
Entities
People
- S. Hanish
Organizations
- United States Naval Research Laboratory