风冷冰箱风扇的气动噪声仿真与降噪研究

发布时间：2018-04-10 14:11

本文选题：风冷冰箱 + 风扇　；参考：《昆明理工大学》2017年硕士论文

【摘要】：随着人们消费水平和生活品质的不断提升,电冰箱已成为每个家庭的生活必备品。和传统的直冷冰箱相比,风冷冰箱具有自动除霜、冷藏速度快、食品保鲜和温度均匀性好等优点,因此颇受用户青睐。但风冷系统使得风冷冰箱相比直冷冰箱噪声较大。目前对风冷冰箱的降噪研究较多,但对风冷系统的风扇降噪研究较少。为此,本论文主要针对风冷冰箱风扇降噪问题进行研究,主要研究内容如下:1)风扇和风道板结构模态分析,利用ANSYS对风扇和风道板进行结构模态分析,模态分析结果表明,系统工作频率远离结构模态频率,结构振动噪声较小可忽略,风冷系统噪声风扇主要是气动噪声;2)风扇和风道板气动噪声仿真分析与验证,首先利用FLUENT软件对风扇和风道板进行气动噪声仿真分析,然后构建了风冷系统噪声测试实验平台,实验结果验证了风扇和风道板气动噪声仿真分析的准确性;3)风扇降噪结构研究,根据气动噪声仿真分析结果,选择风扇叶片数目、叶片出口安装角度、叶轮内径直径为优化变量,建立优化模型。利用OPTIMUS软件构建基于流程集成的风扇结构优化工作流,优化结果表明了优化方法的有效性,降低了风扇引起的噪声;通过上述内容的研究,为风冷冰箱风扇降噪结构优化设计提供了帮助,降低风扇噪声。
[Abstract]:With the improvement of people's consumption and quality of life, refrigerators have become a necessary part of every family.Compared with traditional direct-cooled refrigerators, air-cooled refrigerators have the advantages of automatic defrosting, fast refrigerating speed, good food preservation and good temperature uniformity, so they are favored by users.But the air-cooling system makes the air-cooled refrigerator more noisy than the direct-cooled refrigerator.At present, there are more researches on noise reduction of air-cooled refrigerators, but less research on fan noise reduction in air-cooling systems.Therefore, this paper mainly studies the noise reduction problem of fan in air-cooled refrigerator. The main research contents are as follows: 1) structural modal analysis of fan and air duct plate. The structural modal analysis of fan and air duct plate is carried out by using ANSYS. The results of modal analysis show that,The operating frequency of the system is far from the modal frequency of the structure, and the vibration noise of the structure can be neglected. The main noise fan of the air-cooled system is pneumatic noise (2)) the simulation analysis and verification of the aerodynamic noise of the fan and the air duct plate.Firstly, the aerodynamic noise simulation analysis of fan and air duct plate is carried out by using FLUENT software, and then an experimental platform for testing the noise of air cooling system is constructed.The inner diameter of impeller is an optimization variable, and the optimization model is established.The fan structure optimization workflow based on process integration is constructed by using OPTIMUS software. The optimization results show the effectiveness of the optimization method and reduce the noise caused by the fan.It provides help for the optimization design of fan noise reduction structure in air-cooled refrigerator and reduces fan noise.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM925.21

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