Mole fraction imaging of transverse injection in a ducted supersonic flowLaser-induced iodine fluorescence has been used to generate two-dimensional images of the mixing characteristics of air injected transversely as underexpanded jets behind a rearward-facing step into a ducted Mach 2 freestream; the images thus obtained were processed digitally in order to yield planar-injectant mole fraction distributions. The resulting planar images represent a three-dimensional data base of the injectant mole fraction distribution throughout the flowfield which is then used to reconstruct images exhibiting mole-fraction distributions normal to the duct. These images furnish a direct representation of the evolution of supersonic mixing along the duct, and facilitate the development of one-dimensional mixing schedules on the basis of the three-dimensional data base.
Document ID
19890059548
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Abbitt, John D. Iii (Virginia Univ. Charlottesville, VA, United States)
Hartfield, Roy J. (Virginia Univ. Charlottesville, VA, United States)
Mcdaniel, James C. (Virginia, University Charlottesville, United States)