(NO TITLE).

Abstract

Minor improvements in the automatic impedance computing and plotting equipment have been made. A direct-current heater supply and drive-level attenuators are added features. Impedance measurements have been made on a water-filled elbow and on a globe valve in several degrees on closure. Impedance curves for both these piping elements are significantly different from the curve for a straight water column. The valve exhibits a very high low-frequency impedance when closed; the impedance value at 20 cps decreases by 20 dB when the valve is opened only a quarter turn. Further impedance measurements at the discharge port of a submarine trim pump showed that results were independent of rotor position and conditions at the suction port. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1963
Accession Number
AD0422341

Entities

People

  • J. V. Kahlbau

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Attenuators
  • Automatic
  • Direct Current
  • Frequency
  • Globe Valves
  • Impedance
  • Machines
  • Measurement
  • Mechanical Equipment
  • Plotting
  • Positioning Devices (Machinery)
  • Submarines
  • Valves

Readers

  • Electronics Engineering
  • Materials Science
  • Microwave Engineering.