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本文提出了一套新的测试方法,能够获得全流量范围内低压头小型轴流风扇的气动和噪声性能曲线。利用所设计的测试台完成了具有不同叶片轴向掠角、安装角的微型轴流散热风扇的气动-噪声特性测试,研究安装角和气动掠对风扇性能的影响。结果分析表明:不同安装角下,与原型风扇相比,当Q>0.6 m~3/min时,前掠降低了风扇的全压、全压效率,提高了风扇的噪声,而后掠有助于降噪。
In this paper, a new test method is proposed to obtain the aerodynamic and noise performance curves of a low pressure head small axial fan over the full flow range. The aerodynamic-noise characteristics of a miniature axial-flow cooling fan with different blade axial sweep angles and mounting angles were achieved by using the designed test bench to study the influence of mounting angle and air-swept on fan performance. The results show that: at different installation angles, when Q> 0.6 m ~ 3 / min compared with the prototype fan, the forward sweeping reduces the total pressure and total pressure efficiency of the fan, improves the noise of the fan, and the sweep helps to Noise reduction.