周方向単一溝型ケーシングトリートメントが遷音速圧縮機に及ぼす影響 : 第1報:全体性能と失速特性の変化

概要

論文の詳細を見る
The effect of circumferential single grooved casing treatment on the stability enhancement of NASA Rotor 37 has been examined with CFD analysis. Stall inception mechanism of Rotor 37 was presented first with principal focus on the tip leakage flow behavior, passage blockage, and the vortical flow structures. Detailed observation showed that the combined interaction of the stagnated flow of tip leakage vortex breakdown and the jet-like leakage flow from the mid-chord region leads to the tip-initiated stall inception. The result of numerical parametric study was then demonstrated to show the effect of varying the axial location and the depth of a circumferential single groove. The evaluation based on stall margin improvement showed a higher potential of deeper grooves in stability enhancement, and the optimal position for the groove to be located was indicated to exist near the leading edge of the blade.
公益社団法人日本ガスタービン学会の論文
2014-05-20