Influence of nozzle geometry on underexpanded axisymmetric free jet characteristics

K. Hatanaka, T. Saito

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The effect of nozzle geometry on the structure of a supersonic free jet is investigated both experimentally and numerically for three simple nozzle geometries. In the experiments, the relation between the Mach disk height and diameter and the nozzle pressure ratio are investigated using the schlieren method. In contrast to results obtained in previous studies, our experimental results show that the Mach disk height changes depending on the nozzle geometry. Numerical investigations were conducted by introducing flows upstream of the nozzle and the influence of these upstream flows on free jet configuration has been discussed.

Original languageEnglish
Pages (from-to)427-434
Number of pages8
JournalShock Waves
Issue number5
Publication statusPublished - 2012 Sep


  • CFD
  • Mach disk height
  • Nozzle geometry
  • Underexpanded free jet

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)


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