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Position - attitude - deformation

Precise knowledge of the actual wind tunnel model geometry or position of moving model parts under wind load is a prerequisite for accurately determining aircraft performance. DNW offers its customers the application of an optical technique, based on three-dimensional stereoscopic point tracking of non-intrusive, high contrast markers on wind tunnel model components. Smart processing algorithms allow precise determination of geometric model properties such as wing bending and twisting (mode shapes) or propeller/rotor blade position in real time.

Interference corrections

Where the wind tunnels are used to experimentally simulate conditions in flight, the measurement results have to be corrected to account for the difference between conditions in the wind tunnels and the free flight. This is not necessarily the case when phenomenological research is concerned. Here in the discussion of interferences we are not considering the scale effects that enter the non-dimensional similarity parameters, like the Reynolds number effect or any other similarity containing the length scale.

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King Willem Alexander visiting the LLF

On 07 December 2015, King Willem Alexander of the Netherlands paid a working visit to the large low-speed wind tunnel of DNW, the LLF. This visit was an aftermath of the recent signing of a Memorandum of Understanding between the Dutch and Chinese governments to promote the cooperation on civil aircraft technology. The King was accompanied by the Ambassador of China in the Netherlands, Mr. Chen Xu.

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