Unsteady Lifting Surface Theory Based on Double Linearization Concept for Supersonic Through-Flow Fan

Toshiya Hanada, Masanobu Namba

Research output: Contribution to journalArticle


A full three-dimensional lifting surface theory based on the double linearization concept is developed for a rotating annular cascade model operating at axial supersonic velocity. It is assumed that each blade vibrates with infinitesimal displacement amplitude under small mean loading. Vibration modes normal and parallel to the blade chord are considered. Numerical results are presented to investigate the mean loading effects on the aerodynamic instability of the blade motion. It is found that the bending motion can be unstable due to the presence of mean loading. Some numerical results compared with strip theory predictions demonstrate significant three-dimensional effects on the unsteady aerodynamic force.

Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number569
Publication statusPublished - Jan 1 1994
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this