振動ずる遷音速環状翼列の非定富空力時性の研究 : 第1報,フロンガス環状振動翼列風胴と測定方法

概要

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The controlled-oscillated annular cascade test facility was developed in order to study unsteady aerodynamic characteristics of annular cascade in a transonic flow and at high reduced frequencies, for clarification of a cascade flutter and a forced vibration in tubomachinery. To satisfy two conditions, Freon gas is used as a working fluid and a novel machanical oscillatory system was developed, which can harmonically forced-oscillate all 16 blades in an annular cascade up to 500 Hz, to measure aerodynamic damping in both domains of aerodynamic stability and unstability of a cascade. This paper places an emphasis on the establishment of experimental technique for unsteady aerodynamic damping measurement in transonic flow and at high reduced frequencies, including characteristics of the test facility and auxiliary measuring instruments which are a sound velocity measuring apparatus of Freon gas, a schlieren system for visualization of annular cascade flow, and an apparatus measuring frequency response characteristics for a thin tube-pressure transducer measuring systems.
一般社団法人日本機械学会の論文
1986-02-25