Gas Flows Supporting Umbilical Diving - Requirements and Measurements

Abstract

This report compiles information from various publications and letters about the MK 3 LWDS umbilical-supplied breathing system. New analyses were also conducted with various computational methods to describe the system and the gas supplies delivered to three divers at the maximum depth of the system, 190 fsw. One calculation method for steady state gas flow was based on equations for airflow in pipes. Electrical models were used to describe steady state flow with no divers or dynamic flow with divers. The models were solved by the PSPICE differential equation solver. All methods consistenily illustrated that flow restriction occurs in 600-foot umbilicals and limits the emergency gas supply available at 190 fsw.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2003
Accession Number
ADA446473

Entities

People

  • J. R. Clarke

Organizations

  • United States Navy Experimental Diving Unit

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Computational Fluid Dynamics
  • Computational Science
  • Ducts
  • Electrical Circuits
  • Flowmeters
  • Fluid Dynamics
  • Fluid Flow
  • Gas Flow
  • Hydrodynamics
  • Hypervelocity Flow
  • Measurement
  • Measuring Instruments
  • Pressure Gages
  • Pressure Measurement
  • Steady Flow
  • Venturi Tubes

Readers

  • Aerospace Test and Evaluation
  • Fluid Dynamics.
  • Underwater engineering and Marine Technology.