RADIATION RESISTANCE AND CAVITATION FACTOR OF RECTANGULAR ARRAYS WITH BEAM STEERING,
Abstract
A large, close-packed, steered array is modeled by imposing a traveling wave along the surface of a rectangular radiator. The results of this report are most pertinent to close-packed arrays made up of elements which are small compared with a wavelength. For this type of array it is shown that at large steering angles the cavitation-limited power is greatly reduced below that achievable at broadside. The cavitation factor is generally less when the beam is steered along the longer side of an array than when the beam is steered across the shorter side. An integral solution for the radiation resistance for a general steered array is presented. Numerical results show that the radiation resistance has a maximum value at a particular steering angle for a specific array. Expressions of the radiation resistance are derived for an infinitely long rectangular strip with end-fire beam steering across the width and for a finite, slender rectangular array with end-fire beam steering along the longer side. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 08, 1965
- Accession Number
- AD0624137
Entities
People
- Norman T. Chin
Organizations
- Navy Underwater Sound Laboratory