AERODYNAMIC NOISE TESTS ON X-20 SCALE MODELS. VOLUME 2. SUMMARY AND ANALYSIS REPORT

Abstract

Summaries of fluctuating pressure data presented in Volume I for 1/ 15th-scale X-20 models are made and discussed. Particular emphasis is given to the high over-all rms pressures measured aft of convex corners during transonic test conditions. Additional information relating to these pressures is presented in the form of pressure histories, peak-amplitude distributions, and power spectral densities. Fluctuating-pressure data and space correlation measurements for three closely spaced microphones are presented, illustrating the local nature of the high-level pressures. Analyses of trends for the maximum over-all rms pressure levels for the X-20 tests and other wind-tunnel tests are made. Design charts are developed for predicting maximum levels aft of cone-cylinder transition sections as functions of transition angle and distance downstream of the transition shoulder. Recommendations are made regarding future aerodynamic noise experimental programs.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1965
Accession Number
AD0478215

Entities

People

  • David R. Wiley
  • Michael G. Seidl

Organizations

  • Boeing

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Noise
  • Base Pressure
  • Boundary Layer
  • Boundary Layer Flow
  • Dynamic Pressure
  • Fluid Dynamics
  • Frequency Bands
  • Frequency Shift
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Shock Waves
  • Static Pressure
  • Wind Tunnel Models
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Business Analytics
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster