Maeda, S., Fukuda, H., Kubo, K., Nakao, S., Ono, D. and Miyazato, Y. (2018) Structure of Underexpanded Supersonic Jets from Axisymmetric Laval Nozzles. Journal of Flow Visualization and Image Processing, 25, 33-46.

has been cited by the following article:

• TITLE: Quantitative Flow Visualization by Rainbow Schlieren Deflectometry and Pitot Pressure Measurements for Leek Peeler Nozzle Jets

  AUTHORS: Masatoshi Ezoe, Shinichiro Nakao, Yoshiaki Miyazato

  KEYWORDS: Compressible Flow, Optical Observation, Leek Peeler Nozzle, Rainbow Schlieren Deflectometry, Pitot Pressure

  JOURNAL NAME: Journal of Flow Control, Measurement & Visualization, Vol.7 No.1, January 23, 2019

  ABSTRACT: To optimize the leek peeling performance, a new nozzle has been developed in which the nozzle has a design Mach number of 1.68, an inner diameter of 2.0 mm at the throat, and an inner diameter of 2.3 mm at the exit. Experiments have been conducted over a range of nozzle pressure ratios from 3.0 to 6.0. Flow field issued from the new nozzle is quantitatively visualized by the rainbow schlieren deflectometry and compared with that from a conventional nozzle. Density fields in the free jets are reconstructed by the Abel inversion method for the schlieren images with the horizontal rainbow filter. The density values at the exit of the conventional nozzle obtained by the rainbow schlieren are compared with the analytical results by the flow model proposed in the past. In addition, Pitot probe surveys along the jet centerline were made to obtain the impact pressure distributions. The Mach number and velocity distributions along the jet centerline are obtained from a combination of the density and Pitot pressure data to clarify the fundamental flow structure of leek peeler nozzle jets.