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Flow Acceleration Chanels

Boundary layer separation from the suction side of the fan blades leads to increased vortex noise and lower airflow efficiency. In order to suppress this phenomenon, the Noctua’s A-Series impellers feature suction side Flow Acceleration Channels. These channels alter the flow distribution on the suction side of the blades and speed up the airflow at the crucial outer blade regions. As flow separation is more likely to occur when the speed of the fluid relative to the fan blade is low, the increase in speed achieved through the Flow Acceleration Channels leads to significantly reduced flow separation, which permits lower vortex noise and higher airflow efficiency.



Flow Acceleration Channels





Noctua
03.08.2015 - Dark Tech Reviews NH-C14S
Test verdict: "اذا كنت تبحث عن تبريد صامت واداء جيد جداً لكسر السرعة فهذا المشتتات موجه لك " (Ahmed Mohamed, Dark Tech Reviews)
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03.08.2015 - DVTests.com NH-D15S
Test verdict: "Amazing performance combined with great compatibility!" (Dobrin Krastev, DVTests.com)
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01.08.2015 - PC Games Hardware 09/15 NH-D15
Test verdict: "Kompromisslose Qualität: Sieger dieser Marktübersicht und neuer Spitzenreiter im PCGH-Einkaufsführer ist ein alter Bekannter. Noctuas NH-D15 hat bereits auf dem letzten PCGH-Testsystem seine Qualitäten bewiesen und erfreut sich anhaltender Beliebtheit unter den Lesern. Wenn man genug Platz für den riesigen 2×-140-mm- Dual-Tower hat, findet man kaum einen besseren CPU-Kühler." (Torsten Vogel, PC Games Hardware 09/15)
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01.08.2015 - eTeknix.com NH-U9S
Test verdict: "If I’m building a compact HTPC, workstation or office rig, this will be the cooler I choose. It looks great, it’s easy to install, it’s got exceptional build quality and it’s quieter than a mouse." (Peter Donnell, eTeknix.com)
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