Accession Number : AD0479564


Title :   COMPRESSIBLE FLOW IN PRESSURIZED COMMUNICATION CABLE,


Corporate Author : SCOTT CORP HOUSTON TX


Personal Author(s) : Roach, Richard T ; Herring, Joe S


Report Date : Dec 1965


Pagination or Media Count : 30


Abstract : Cable Pressurization Programs initiated by the communication industry almost without exception have resulted in significant reductions in plant maintenance cost and increase in communication reliability. For the past twenty years, the knowledge of these benefits have permeated the industry and become accepted to the extent that all major systems are either pressurized, in process of pressurization, or in the engineering study phase of pressurization. With the advent of general acceptance of pressurization by the communication industry the traditional status of pressurization programs must come under close scrutiny. In the past, many pressurization programs have relied almost exclusively on a 'rule of thumb' approach by persons highly skilled in communication techniques, but barely knowledgeable in Fluid Mechanics. The results of these programs have been satisfactory but far short of achieving the maximum return for the effort expended. The theory and practice of the more accurate Fluid Mechanics of cable pressurization presented in this paper offer the communication industry a method of transforming an inexact art into a definitive procedure consistent with the electrical concept of the communications systems. Included in this potential are more accurate and definitive field procedures for maintenance purposes, performance analyses for better plant management, and specific specification capability for better plant engineering. This paper is divided into two functional sections: the first covers the theoretical development of cable Pneumatic Characteristics relationships; and, the second portion describes the practical application of these relations to the operating cable plant. (Author)


Descriptors :   *COMMUNICATION EQUIPMENT , ELECTRIC CABLES , COMPRESSIBLE FLOW , MAINTENANCE , RELIABILITY , AIR , NITROGEN , PRESSURE , TEMPERATURE , DENSITY , ROUGHNESS , EQUATIONS , NUMERICAL INTEGRATION , CURVE FITTING , LEAKAGE(FLUID)


Subject Categories : Fluid Mechanics
      Non-radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE