NACA 0015 Data (Three-Dimensional)
Abstract
The tests described herein were carried out in the University of Glasgow's 2.1 3m X 1.61 m 'Handley Page' wind tunnel which is a low-speed closed return type. The test model was a straight wing with a NACA 0015 cross-section and had simple solids of revolution at its tips. Because the lift behaviour at low aspect-ratios (AR) is quite different from that at high aspect ratios, particularly when AR is less than 2.0, the AR of this model was chosen as 3.0 to avoid strong three-dimensional effects at the mid-span in steady flow. When testing in a closed working section, it is very important to reduce the wall effects. In order to diminish the effect of upwash on the angle attack near the wing tips of the model and to reduce the blockage effect to minimum, the model size was carefully determined. The final overall dimensions were 126cm )C 42cm which resulted in a variation of model blockage from a minimum of 2.6% to a maximum of 11.35% (not including the fairing of struts) and a model span to tunnel width ratio of 0.592. According to previous studies of the blockage effect for 2-D dynamic stall testing, these dimensions were considered acceptable. The model was supported on three struts, as shown in Fig. 7. These were, in turn, connected to the main support structure and actuation mechanism which was situated below the tunnel. Movement of the model was produced by displacement of the two rear struts and the model was pivoted about the quarter chord position on a tool steel shaft connected to the front support via two self-aligning bearings. The model was constructed with an aluminium framework of ribs and stringers and an outer epoxy glass fibre skin. Figure 8 illustrates this construction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2000
- Accession Number
- ADP010734
Entities
Organizations
- University of Glasgow