清扫车专用风机内流仿真分析与优化设计  

Analysis of the Optimized Design and Numerical Simulation on the Centrifugal Fan of Sweepers

作　　者：张斌 李亮 付玲 张劲 

机构地区：[1]中联重科股份有限公司,湖南长沙410013 [2]建设机械关键技术国家重点实验室,湖南长沙410013

出　　处：《机械设计与制造》2014年第9期246-248,共3页Machinery Design & Manufacture

基　　金：湖南省自然科学基金项目(13JJ3130)

摘　　要：针对某型号清扫车能耗高、噪声大的问题,以清扫车主要能耗源和噪声源的风机作为研究对象,对清扫车专用风机进行三维数值仿真分析。使用Fluent软件并采用RNGk-ε湍流模型和多重坐标系(MRF)法进行求解,对比分析原始结构和改进结构在额定工况下流场特征。结果表明,改进结构的叶轮内部流场"射流—尾流"结构明显减弱,涡耗散和涡量减小,流场更均匀,风机噪声大幅度降低,效率明显提高,实现了"节能、降噪"目的。同时Fluent软件的仿真模拟可以很好地指导工程实践,也可以替代某些试验,极大地缩短了研发周期。The three dimensional numerical simulation has been made for a centrifugal fan of sweepers which has high energy cost and large noise. The software Fluent with RNGk-ε turbulence model and MRF/s used to solve the internal flow field of origin and optimal structure. The results show that the jet-wake flow structure is weaker on the optimal structure. The turbulence eddy dissipation and vorticity is also lower and the flow field becomes uniform on the optimal structure. The efficiency is lower and the target that energy saving, lower noise is realized. Also, the software Fluent can be used to guide the engineering practice or replace some experiments, which can shorten the developing period largely.

关 键 词：清扫车 专用离心风机 分离流动 涡耗散 涡量 

分 类 号：TH16[机械工程—机械制造及自动化] TH442