Aerodynamic Performance Study on Small Axial Fan with Tooth Shaped Trailing Edge
Aerodynamic Performance Study on Small Axial Fan with Tooth Shaped Trailing Edge
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发表时间：
2012
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通讯作者：
L. Bo
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作者：
L. Bo
小型轴流风扇是计算机的关键冷却元件，其风量和噪声直接影响计算机的正常工作和寿命。冷却风扇的高性能和低噪声已成为计算机配置的关键问题之一。设计了一种带齿形后缘的小型轴流风扇，其齿形密度从轮毂到叶片逐渐增大，利用CFD软件对其静态性能和气动性能进行了模拟，并对其流场和气动进行了分析。齿形后缘对静性能没有影响，但在大流量下，效率低于原型风扇。对叶尖间隙和出口区的某些点进行噪声监测，结果表明，叶尖间隙的噪声几乎相同，出口区的噪声低于原型风扇。齿形后缘风扇转子表面的声表面功率比原型风扇低，且低声功率区域比原型风扇大。
The small axial flow fan is a key cooling element of computer.So the air volume and noise have effect on the normal work and life span of computer directly.High-performance and low-noise of cooling fan already become one of the key problems of the computer configuration.A small axial fan with tooth shaped trailing edge which tooth density is enlarging from hub to leaf is designed.CFD software is used to simulate the static performance and aerodynamic performance.Further more,the flow filed and aerodynamic are analyzed.The small axial flow fan with tooth shaped trailing edge has no effect on the static performance.However,under the large flow rate,the efficiency is lower than that of the prototype fan.The certain points in the tip clearance and export area are monitored for noise.The result shows that the noise in the tip clearance is almost same.The noise in the export area is lower than the prototype fan.The acoustic-surface power on rotator surface of the fan with tooth shaped trailing edge is lower than that of prototype fan.And the region of lower acoustic power is lager than the prototype fan.