基于仿生学的轨道交通牵引系统用离心风机的降噪研究

Research on noise reduction of centrifugal fans in rail transit traction systems based on bionics

针对轨道交通牵引系统中使用的离心风机噪声问题展开研究,通过仿生学的方法优化离心风机叶轮的设计,以降低其噪声。通过叶轮气动流场的数值模拟和风机噪声检测试验,分析了离心风机的噪声来源,并提出了一种仿生结构的叶轮方案,该结构优化了叶轮内部流场,最终降低了风机噪声。研究结果表明,基于仿生学的优化方法,对于降低轨道交通牵引系统离心风机的噪声具有重要意义。

Aiming at the noise problem of centrifugal fans in rail transit traction systems,the design of centrifugal fan impellers is optimized by bionic methods to reduce their noise.We analyzed the noise sources of the centrifugal fan through numerical simulation of the aerodynamic flow field of the impeller and fan noise detection experiments,and proposed a biomimetic structure impeller scheme.The structure optimized the internal flow field of the impeller and ultimately reduced the fan noise.The research results show that optimization methods based on bionics are of great significance in reducing the noise of centrifugal fans in rail transit traction systems.