Accession Number : AD0654157

Title :   ORIFICE SELECTION IN SEMI-CLOSED CIRCUIT MIXED GAS UNDERWATER BREATHING APPARATUS.

Descriptive Note : Research rept.,

Corporate Author : NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C

Personal Author(s) : Harter,J. V.

Report Date : 13 APR 1967

Pagination or Media Count : 31

Abstract : The report was prepared to support Man-in-the-Sea Operations wherein the gas flow requirements in semi-closed circuit breathing apparatus will vary over a wide range due to extension of diving depths in semi-closed circuit breathing apparatus to 600 feet of seawater. A graphical method of orifice selection is presented. Information for graph preparation was obtained through computer operations using standard compressible fluid flow formula for critical flow through an orifice. (Author)

Descriptors :   (*BREATHING APPARATUS, *ORIFICES), UNDERWATER, SELECTION, GAS FLOW, MIXTURES, GRAPHICS, PRESSURE, DIVING, CONTROL SYSTEMS

Subject Categories : Life Support Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE