Correlation of helicopter rotor tip vortex measurements

被引：58

作者：

Bhagwat, MJ ^{[1
]}

Leishman, G ^{[1
]}

机构：

[1] Univ Maryland, Dept Aerosp Engn, Glenn L Martin Inst Technol, College Pk, MD 20742 USA

来源：

AIAA JOURNAL | 2000年 / 38卷 / 02期

关键词：

D O I：

10.2514/2.957

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The roll-up and development of the tip vortices generated by subscale helicopter rotors were measured and analyzed. The measurements were performed on one- and two-bladed hovering rotors using three-component laser Doppler velocimetry. A trip strip was used to simulate boundary-layer transition at the higher Reynolds numbers typical of the full-scale rotor. The detailed velocity field of the tip vortex was investigated, a strong self-similarity of the swirl velocity profile being found. The measurements suggest a general logarithmic growth of the viscous core, which for older vortex ages is proportional to the square root of time (vortex age). Measurements from other helicopter rotor and fixed-wing experiments are used to support the observations.

引用

页码：301 / 308

页数：8

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