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
收藏
页码：301 / 308
页数：8
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