Boundary layer trips on airfoils at low reynolds numbers
Boundary layer trips on airfoils at low reynolds numbers
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DOI：
10.2514/6.1997-511
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
C. A. Lyon;M. Selig;Andy P. Broeren
中科院分区：
文献类型：
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作者：
C. A. Lyon;M. Selig;Andy P. Broeren
在雷诺数为100,000到300,000的M06-13-128、E374和SD7037翼型上进行了三种类型的边界层飞行试验(单一二维平面飞行、多个二维平面飞行和三维飞行)。获得了多个行程高度和位置的流动可视化和阻力数据。为了便于翼型之间的比较，TRIPS相对于未跳闸的层流分离位置进行了定位。阻力数据显示，相对较薄的行程阻力显著减少，较厚的行程表现略好。对于位于层流分离上游的跳跃来说，跳跃位置的影响不大。与单一的2-D旅行相比，利用多个2-D旅行或复杂的3-D旅行几乎没有优势。最后，通过应用TRIPS协议，不可能改善具有大的层流分离气泡的翼型的性能，而不是具有小气泡的未跳闸的翼型。
Three categories of boundary layer trips (single 2-D plain, multiple 2-D plain, and 3-D trips) were tested on the M06-13-128, E374, and SD7037 airfoils over the Reynolds numbers of 100,000 to 300,000. Flow visualization and drag data were acquired for a number of trip heights and locations. To facilitate comparisons between airfoils, trips were located relative to untripped laminar separation locations. Drag data showed dramatic drag reductions for relatively thin trips, with thicker trips having slightly better performance. The trip location proved to be of little significance for trips located upstream of laminar separation. Little advantage was seen in utilizing multiple 2-D trips or complex 3-D trips over single 2-D trips. Finally, through the application of trips, it was not possible to improve the performance of an airfoil exhibiting large laminar separation bubbles over that of an untripped airfoil with small bubbles.