CAVITATION - IS IT ONLY BAD (KAVITATSIYA. TOLKO LI MINUSY)

Abstract

The principles of cavitation are discussed and its adverse effects cited. The development of cavitation during operation at high rates of speed is unavoidable and all measures to prevent it have been unsuccessful. Cavitation led to the discovery of supercavitation which, in turn, inspired the Russian scientist V. L. Pozdyunin to design supercavitation propellers. The shape of the propeller blades causes rapid development of a cavity that closes behind the propeller, while the simultaneous decrease in resistance and lifting force make it possible to develop a sufficiently high efficiency. Supercavitation conditions set in at speeds of 10 to 100 m/sec or higher. Noise, vibration, and erosion at lower speeds can be eliminated by pumping air in the cavities. Thus, despite its harmful effects, cavitation might eventually find useful application, as have other harmful physical processes in the past.

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Document Details

Document Type
Technical Report
Publication Date
Sep 15, 1967
Accession Number
AD0670081

Entities

People

  • L. Epshtein

Organizations

  • Air Force Systems Command

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Barometric Pressure
  • Blades
  • Bubbles
  • Cavitation
  • Elastic Properties
  • Engineering
  • Engineers
  • Films
  • Flow
  • High Pressure
  • Machine Tools
  • Materials
  • Mechanical Properties
  • Oxide Films
  • Propeller Blades
  • Propellers
  • Resistance

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Educational Psychology
  • Underwater engineering and Marine Technology.