TURBULENT WALL PRESSURE FLUCTUATIONS UNDER SEPARATED SUPERSONIC AND HYPERSONIC FLOWS.

Abstract

The objective of the project was to conduct an exploratory theoretical and limited experimental program to obtain the parameters that are important in the occurrence, magnitude, frequency content, and effective areas of forcing functions arising from separated flow, wakes, base pressure fluctuations, and oscillating shock waves. Two models were used to obtain pressure fluctuation data generated by the above mentioned phenomena from wind tunnel tests. These models were purposely constructed to generate separated flows, oscillating shock waves, and base pressure fluctuations. The fluctuating pressure data obtained during the tests were reduced in the form of one-third octave band spectra. These reduced data are compiled. Analyses of these data were made, and are given. Comparisons were made of the effects of Mach number, angle of attack, frequency, and Strouhal number on the sound pressure levels generated. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0622395

Entities

People

  • J. D. Revell
  • R. E. Gleason

Tags

DTIC Thesaurus Topics

  • Band Spectra
  • Base Pressure
  • Flow
  • Frequency
  • Hypersonic Flow
  • Mach Number
  • Shock
  • Shock Waves
  • Sound Pressure
  • Spectra
  • Strouhal Number
  • Waves
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flow