【作者】 姚远；

【导师】 鄂加强； 胡辽平；

【作者基本信息】 湖南大学 ， 动力工程（专业学位）， 2021， 硕士

【摘要】 自2013年以来,在我国大部分地区的雾霾情况日渐加重,已经对人类生活和动植物的生存环境带来了极为恶劣的影响。雾霾中的PM2.5对人身体危害最大。因此,旋风分离器作为一种结构简单的除尘设备,得到了人们广泛的关注与应用。本文提出一种电动除霾车用四进气口旋风分离器设备,电动车给引风机提供能量,使空气通过进气口进入旋风分离器内部,在离心力和重力的作用下,空气中的颗粒物被旋风分离器底部的集尘箱捕捉,实现颗粒物与空气分离的目的,净化后的空气通过排气管排出,论文主要创新点和研究工作如下:(1)建立了单进气口旋风分离器模型,研究分析了单进气口旋风分离器内部流场特性,结果表明,单进气口旋风分离器因其内部流场不对称,引起上灰环和短路流现象,导致PM2.5的分离效率低。(2)建立了四进气口旋风分离器模型,探究并获得了不同结构参数对四进气口旋风分离器内部流场特性和分离效率的影响规律,为四进气口旋风分离器的结构改进提供了参考依据。(3)采用灰色关联分析方法探究了排气管插入深度、排气管直径、入口速度和颗粒物浓度等因素对四进气口旋风分离器的分离效率和压降的影响特性,为旋风分离器的性能优化提供了理论依据。更多还原

【Abstract】 Since 2013,the smog situation in most areas of China has been getting worse,which has already brought extremely bad effects on human life and the living environment of animals and plants.PM2.5 in smog was the most harmful to human health.Therefore,as a kind of dust removal equipment with a simple structure,the cyclone separator has been widely concerned and applied.This paper proposed a four-inlet cyclone separator device for electric haze removal vehicles.The electric vehicle provides energy to the induced draft fan so that air enters the cyclone separator through the air intake.Under the action of centrifugal force and gravity,the particulate matter in the air.It was captured by the dust box at the bottom of the cyclone separator to achieve the purpose of separating particles from the air,and the purified air was discharged through the exhaust pipe.The main innovations and research work of the paper are as follows:(1)The single-inlet cyclone model was established,and the characteristics of the internal flow field of the single-inlet cyclone were studied and analyzed.The results showed that the single-inlet cyclone caused the upper ash ring and short circuit due to the asymmetry of the internal flow field.Flow phenomenon,resulting in low separation efficiency of PM2.5.(2)The four-inlet cyclone model was established,and the influence of different structural parameters on the internal flow field characteristics and separation efficiency of the four-inlet cyclone was explored and obtained,which provided a basis for the structural improvement of the four-inlet cyclone.(3)The influence of exhaust pipe insertion depth,exhaust pipe diameter,inlet velocity and particulate concentration on the separation efficiency and pressure drop of the four-inlet cyclone separator was investigated by using grey correlation analysis method,which provided a theoretical basis for the performance optimization of the cyclone separator.更多还原