Application of Rainbow Schlieren Deflectometry for Jets from Round Laval Nozzles Followed by Cylindrical Ducts

The jet from a round Laval nozzle followed by cylindrical duct with an inner diameter of 10 mm and length 50 is investigated experimentally. has design Mach number 1.5. Quantitative flow visualization the issued exit performed over range pressure ratios 2.0 to 4.5 using rainbow schlieren deflectometry combined computed tomography investigate three-dimensional structure. features near-field shock systems in jets are displayed density contour plot at cross-section including centerline. Effects ratio on profile along centerline clarified quantitatively. In addition, comparison between present experiment previous one conventional for profiles carried out examine effect duct. Furthermore, structures overexpanded underexpanded demonstrated isopycnic surfaces visualize internal features.