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</html><thumbnail_url>https://www.nlr.org/wp-content/uploads/2025/03/copyright_nlr_2018_e1501_flow-duct-facility.jpg</thumbnail_url><thumbnail_width>2048</thumbnail_width><thumbnail_height>1152</thumbnail_height><description>De Flow Duct Facility (NLR-FDF) draagt bij aan onderzoek naar geluidsreducerende technieken om vliegtuigen stiller te maken. Het onderzoek wordt uitgevoerd tijdens de vroege ontwikkelingsfase (lage TRL) of ter verbetering van bestaande systemen. De FDF is een gesloten-circuit-windtunnel voor het testen geluid in turbine simulatie bij stromingsafmetingen en snelheden Stroompwaarts en -afwaartst van de testsectie [&hellip;]</description></oembed>
