Improvement of the performance of a supersonic nozzle by riblets

Kazumi Tsunoda, Tomohiko Suzuki, Toshiaki Asai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This paper describes an experimental study of supersonic internal flow over a riblet surface mounted on a channel wall to reduce pressure loss and improve the performance of a supersonic nozzle. The magnitude of the static pressure in the pressure-rise region observed in channels with riblet surface became lower than that for a smooth surface, and the significance of its difference was indicated by uncertainty analysis estimated at 95 percent coverage. The Mach number distributions obtained by traversing a Pitot-tube showed that the separation point moved downstream and the size of the separation region became small when using riblets. Furthermore, it was found that the stagnation pressure loss reduction was as large as 56 percent in the uniform supersonic flow field at a Mach number of 2.0, and 29 percent in the separation region.

Original languageEnglish
Pages (from-to)585-591
Number of pages7
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number3
Publication statusPublished - 2000 Sept

ASJC Scopus subject areas

  • Mechanical Engineering


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