Accession Number : AD0357139

Title :   NEAR FIELD PRESSURE FOR A STEERED ARRAY OF STRIPS

Descriptive Note : Technical note,

Corporate Author : CONTROL DATA CORP MELVILLE NY TRG DIV

Personal Author(s) : Mangulis, Visvaldis

Report Date : DEC 1964

Pagination or Media Count : 30

Abstract : The near field pressure and the cavitation limited power output of a steered array of infinite rigid plane baffle is calculated. The pressure distribution on the surface of the array is almost constant for an array steered to broadside, and it becomes undulatory as the array is steered away from broadside. When the strips occupy a large fraction of the total array area, the peak pressure occurs off the surface of the array for an array steered to broadside. Near endfire, for the same ratio of the strip areas to the total array area, small strips closer together have a lower peak pressure than large strips farther apart. The mutual coupling coefficients and the radiation impedances of strips are also calculated. For an array steered to broadside or for an array with strip widths much less than a wavelength, one can approximate the peak pressure magnitude by the magnitude of the maximum impedance. (Author)

Descriptors :   (*UNDERWATER SOUND, SCANNING SONAR), (*SCANNING SONAR, ACOUSTIC IMPEDANCE), CAVITATION, PRESSURE, UNDERWATER SOUND SIGNALS.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE