Density field measurement and approximate reconstruction of supersonic mixing layer

The density field measurement of supersonic mixing layer based on the nanoparticle-based planar laser scattering method was studied. The calibration of experimental images was analyzed, and the relation between tracer particles concentration and local density of flowfield was calibrated with oblique shockwave experiment. According to the characteristic of mixing layer images, the influence of uneven light intensity distribution was calibrated. With these calibration methods, the density field of supersonic mixing layer with convective Mach number at 0.12 was measured. By analyzing the spanwise vortical structures and streamwise density field, the three dimensional (3D) density field was approximately reconstructed, which apparently reflected the 3D structure of supersonic mixing layer.

[1]  M. Koochesfahani,et al.  Molecular Tagging Velocimetry (MTV) measurements in gas phase flows , 1999 .

[2]  A. Vogel,et al.  Modern Optical Techniques in Fluid Mechanics , 1984 .

[3]  G. S. Settles,et al.  Colour-coding schlieren techniques for the optical study of heat and fluid flow☆ , 1985 .

[4]  Shihe Yi,et al.  The experimental study of interaction between shock wave and turbulence , 2007 .

[5]  Winfried Stricker,et al.  Application of spontaneous Raman and Rayleigh scattering and 2D LIF for the characterization of a turbulent CH4/H2/N2 jet diffusion flame , 1998 .

[6]  G. Settles.  Schlieren and shadowgraph techniques , 2001 .

[7]  Shigeya Watanabe,et al.  Velocity field of the planar shear layer - Compressibility effects , 1998 .

[8]  Michel Stanislas,et al.  Main results of the Second International PIV Challenge , 2005 .

[9]  R. Teets.  Accurate convolutions of coherent anti-Stokes Raman spectra. , 1984, Optics letters.

[10]  Christian Rey,et al.  Particle Image Velocimetry in Mach 3.5 and 4.5 Shock-Tunnel Flows , 2002 .

[11]  D. W. Bogdanoff,et al.  Compressibility Effects in Turbulent Shear Layers , 1983 .

[12]  C. Carter,et al.  Molecular Filtered Rayleigh Scattering applied to combustion and turbulence , 1999 .

[13]  C. Carter,et al.  Simultaneous Rayleigh imaging and CH-PLIF measurements in a lifted jet diffusion flame , 2000 .

[14]  Dimitri Papamoschou,et al.  STRUCTURE OF THE COMPRESSIBLE TURBULENT SHEAR LAYER , 1989 .

[15]  M. G. Mungal,et al.  Planar velocity measurements in compressible mixing layers , 1997 .

[16]  James F. Meyers.  Doppler global velocimetry - The next generation? , 1992 .

[17]  Lambertus Hesselink,et al.  Digital Image Processing in Flow Visualization , 1988 .

[19]  Lin He,et al.  The fractal measurement of experimental images of supersonic turbulent mixing layer , 2008 .

[20]  Gregory S Elliott,et al.  On the use of filtered Rayleigh scattering for measurements in compressible flows and thermal fields , 2005 .

[21]  J. Dutton,et al.  Accuracy and resolution issues in NO/acetone PLIF measurements of gas-phase molecular mixing , 2002 .

[22]  Density-sensitive whole-field flow measurement by optical speckle photography , 1993 .

[23]  Walter R. Lempert,et al.  Two-dimensional measurement of density, velocity, and temperature in turbulent high-speed air flows by UV rayleigh scattering , 1990 .

[24]  Ellen K. Longmire,et al.  Simultaneous two-phase PIV by two-parameter phase discrimination , 2002 .

[25]  P. Logan,et al.  Measurements of temperature, density, pressure, and their fluctuations in supersonic turbulence using laser-induced fluorescence , 1987 .

[26]  Walter R. Lempert,et al.  Accuracy limits for planar measurements of flow field velocity, temperature and pressure using Filtered Rayleigh Scattering , 1998 .

[27]  J. Drummond,et al.  Supersonic Coaxial Jet Experiment for CFD Code Validation , 1999 .