Products | Technologies | Support | Press | Reviews | Where To Buy
Home

Nine Blade Design
The pressure-optimized Nine Blade Design of the NF-P12 (P stands for pressure, power and performance) has been specifically developed for high-impedance applications such as CPU coolers, water-cooling radiators, power supplies or cases with restrictive fan grills. It achieves outstanding static pressure and high airflow at very low noise levels.

While most conventional 120mm rotors possess seven comparably narrow fan blades, the NF-P12's Nine-Blade Design uses nine large, closely spaced blades with a relatively low angle of attack in order to achieve maximum static pressure and high airflow. As a result, the NF-P12 provides no less than 1.68 mm H2O at 1300 rpm, which is something that other fans merely achieve at 1600 rpm or more.

Nine Blade Design


As a matter of principle, increasing the number of blades involves the risk of increasing the aerodynamic noise in general and noises caused by rotor-stator interaction in particular. Basically, an increase in static pressure usually brings about higher noise emissions. In the case of the NF-P12, this problem is dealt with by adding Vortex-Control Notches to the blades' trailing edges. Due to the two notches at the trailing edge, the flows along the suction and pressure side mix more smoothly. This allows for less turbulence and velocity loss, which leads to a significant reduction in noise emission as well as increased efficiency. In order to achieve the smoothest possible transition and maximum noise reduction, the Vortex-Control Notches are rounded in shape.

Nine Blade Design


In addition to optimizing the joining of the flows at the trailing edge, the Vortex-Control Notches fulfil the task of psychoacoustic optimization: Due to the Vortex-Control Notches, trailing edge vortices are split up into several smaller vortices. Thus the noise is spread over a wider range of frequencies and therefore perceived as much less annoying.

Nine Blade Design


The Vortex-Control Notches' effect of psychoacoustic optimization is further enhanced by the staggering of the notches. The Vortex-Control Notches are staggered from blade to blade so that each blade creates a different vortex pattern. As a result, the fan's noise emission is better spread over the frequency spectrum and thereby makes it yet more pleasant to the human ear.

Nine Blade Design


Links:
button  NF-S12 & NF-P12: Technical Backgrounds
button  Which fan is right for me?




Noctua
01.09.2015 - Neoseeker.com NH-C14S
Test verdict: "With the availability of past and future mounting kit options from Noctua, a 6 year warranty and several fan configuration options, the NH-C14S cooler proves an exceptional design that will help your computer system operate with ideal thermal performance." (Marvin Purdy, Neoseeker.com)
Submit

01.09.2015 - ITPC.net.pl NH-U14S
Test verdict: "Mogę z czystym sumieniem polecić każdemu chłodzenia tej firmy, gdyż wyróżniają się wysoką wydajnością i idealną wręcz jakością wykonania. Ewidentnie jest to wzór do naśladowania." (Karol Kaszubowski, ITPC.net.pl)
Submit

31.08.2015 - SpazioiTech.it NF-F12 PWM
Test verdict: "Consiglio caldamente, o sarebbe il caso di dire freddamente (ora potete anche compatirmi per la battuta, NdR), questi due compagni delle estati italiane." (Andrea Giorgio, SpazioiTech.it)
Submit

29.08.2015 - ITPC.net.pl NH-U12S
Test verdict: "Jest to propozycja idealna dla pasjonatów ciszy i bezkompromisowej wydajności." (Karol Kaszubowski, ITPC.net.pl)
Submit