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ALTERNATIVE BLADE DESIGN
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10.1 Airfoil design
The airfoil design candidates shown on figure 10.1 are inspired by a survey of different
existing designs [42], [43] and [44]. The airfoils are basically curved plates with different
radii and chamfered edges. Both may be manufactured either from pipe cut-outs or from
rolled plates.
Figure 10.1: Main dimensions of the two alternative airfoils. Wall thickness is 5 mm for both
airfoils. Left: Airfoil A. Right: Airfoil B.
It is incontestably possible to optimise the developed designs, but this is beyond the scope
of this project thesis.
The airfoil profiles are tested as described in appendix J, which also contains a full report
of the test results. The evaluation of section 10.2 is based on the test results.