Mean Velocity, Turbulence Intensity and Turbulence Convection Velocity Measurements for a Convergent Nozzle in a Free Jet Wind Tunnel

1 .O SUMMARY Page No. 2.0 INTRODUCTION 2.1 Background 2.2 Investigation Description 3.0 EXPERIMENTAL DESCRIPTION 3.1 Test Apparatus 3.1.1 UTRC Facility 3.1.2 Hot Wire Apparatus 3.2 Data Acquisition 3.3 Test Definition 3.3.1 Mean Velocity, Turbulence Velocity and Turbulence Spectra 3.3.2 Cross Correlation Coefficients and Convection Velocities 3.4 Test Procedure 3.4.1 Determination of Model Nozzle and Wind Tunnel Velocities 3.4.2 Anemometer Calibration 4.0 RESULTS AND DISCUSSION 13 4.1 Mean Velocity 13 4.2 Mixing Layer Growth 13 4.3 Turbulence Measurements 15 4.3.1 Turbulence Spectra 15 4.3.2 Turbulence Intensity 16 4.4 Turbulence Convection Velocity 18 5.0 SUMMARY APPENDIX A ANALYSIS OF ERRORS APPENDIX B TABULATION OF CONVECTION VELOCITIES 23 4 4 4 4 7 9 9 9 10 10 11 21 22