Effective Source Distribution in a Choked Screech Jet,

Abstract

Using experimental measurements of the sound pressure and phase in the near field of a choked screech jet, a method is proposed for computing the effective source positions, their strengths and phases. Two models are considered. The first assumes a distribution of point sources along the jet axis and the second assumes ring sources along the jet boundary instead. A technique of minimization due to Powell is used and a solution is obtained when the sum of squares reaches a minimum. Results for a choked jet at a screech frequency of 3170 c/s are presented. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1971
Accession Number
AD0727345

Entities

People

  • B. H. K. Lee
  • R. Westley

Organizations

  • National Research Council Canada

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Frequency
  • Measurement
  • Near Field
  • Pressure Distribution
  • Sound Pressure

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Wave Propagation and Nonlinear Chaotic Dynamics.