Numerical study on the underexpanded Coanda jet

Keisuke Sawada, Kengo Asami

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The problem of Coanda jet flow in an underexpanded supersonic environment is studied numerically by solving the Navier-Stokes equations in two and three dimensions. The study considers a flow initiated by a jet bounded by a sidewall and expanding around a circular cylinder, for which a set of experimental data exists. Pressure distributions on the cylinder surface are compared in detail with the experimental data. In the two-dimensional calculation, the characteristic oscillatory pressure pattern is reproduced well, but quantitative agreement with the experimental data is rather poor. The three-dimensional calculation reveals the significant influence of the sidewall on the flowfield. It is suggested that the three-dimensional structure developed in the flow field is the cause of the poor quantitative agreement obtained in the two-dimensional calculation.

Original languageEnglish
Pages (from-to)641-647
Number of pages7
JournalJournal of Aircraft
Issue number5
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering


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