ACOUSTIC RADIATION FROM PRESSURE-ANTISYMMETRIC MODES OF A CENTRALLY VENTED CYLINDRICAL CAVITY.

Abstract

The losses associated with the pressure-antisymmetric modes of centrally vented cylindrical cavities are of special interest because of their relevance to acoustic instability of rocket motors. Because the pressure amplitude of such an unperturbed mode is highly nonuniform over the orifice, the usual lumped circuit calculation is invalid. If it is used in spite of this, one finds no radiation out of the orifice. A variational analysis was carried out to obtain a quantitative estimate of the loss which should actually occur. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1962
Accession Number
AD0626718

Entities

People

  • R. H. Cantrell
  • R. W. Hart

Organizations

  • Johns Hopkins University Applied Physics Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Instability
  • Nonuniform
  • Radiation
  • Rocket Engines

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Rocket Propulsion.
  • Theoretical Analysis.