SUPERSONIC UNSTALLED FLUTTER IN ARBITRARY MISTUNED CASCADES

Li Qinwu; Hen Qun; Fan Feida

Chinese

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SUPERSONIC UNSTALLED FLUTTER IN ARBITRARY MISTUNED CASCADES

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- SUPERSONIC UNSTALLED FLUTTER IN ARBITRARY MISTUNED CASCADES
- Vol. 8, Issue 1, (1993)
- 作者机构：
  
  1. 国防科技大学
  2. 西安市西北工业大学702教研室,西北工业大学,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1993
- 稿件说明：
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Li Qinwu, Hen Qun, Fan Feida. SUPERSONIC UNSTALLED FLUTTER IN ARBITRARY MISTUNED CASCADES[J]. 1993, 8(1).
DOI：

Li Qinwu, Hen Qun, Fan Feida. SUPERSONIC UNSTALLED FLUTTER IN ARBITRARY MISTUNED CASCADES[J]. 1993, 8(1). DOI：

摘要

把叶片简化为具有对称截面、长、直、带预扭的非均匀弹性梁

并结合超音速状态下计算由振动引起的非定常气动载荷的气动模型

用哈密尔顿原理建立一组旋转状态下失调叶栅气弹稳定性方程 ;这组方程对弯曲—弯曲—扭转之间耦合严重的失调叶栅尤有意义。

Abstract

By the use of Hamilton's principle

a set of aeroelastic equations is formulated to describe the motion of an arbitrary mistuned rotating cascade with high aspect ratio

flexible pretwisted

nonuniformed blades.A two dimensional aerodynamic theory is used to calculate unsteady force and moment coefficients for vibrating aerofoil in supersonic unstalled cascade.This set of equations is of great value to a fan blade with the inertial

structural and aerodynamic coupling in bending bending torsion.Results obtained from the aeroelastic stability analysis of a real fan stage show that amplitude and different order of mistuning and other kinds of structural properties have an apparent effect on boundaries of supersonic unstalled flutter.

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Related Institution

The Key Laboratory of Strength and Vibration of Ministry of Education, School of Aerospace,Xi'an Jiaotong University

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