吸油烟机多叶离心风机的优化与改进
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摘要
吸油烟机是常用的家电,但目前很多吸油烟机都存在油烟抽吸不尽,能耗偏高且有一定噪声等问题。针对此不足,本文首先对某厂家提供的现有的家用吸油烟机多叶离心风机进行几何建模,然后对离心风机内部流场进行计算分析,从而得到影响风机性能的最主要因素。最后以增大风机压力,减少能耗及降低噪声为目标对影响参数进行优化设计。结果表明,优化后的离心风机内部流场得到了明显的改善,风机效率从56.6%提高到63.2%,全压由253.6Pa增加到266.1Pa。
Nowadays, although range hoods are very common in life, many range hoods currently in use have problems such as unclean of the exhaust fumes and a certain amount of noise. In order to overcome this problem, this paper first establishes the geometric model of the existing multi-blade centrifugal fan of a domestic hood, and then computes and analyzes the internal flow field of the centrifugal fan to obtain the most important parameters that dominate the fan performance. Finally,these parameters are optimized for the purpose of increasing the fan pressure, reducing energy consumption and noise. The results show that the internal flow field of the optimized fan has been significantly improved, the fan efficiency has increased from 56.61% to 63.2%, and the total pressure has increased from 253.6 Pa to 266.1 Pa.
Nowadays, although range hoods are very common in life, many range hoods currently in use have problems such as unclean of the exhaust fumes and a certain amount of noise. In order to overcome this problem, this paper first establishes the geometric model of the existing multi-blade centrifugal fan of a domestic hood, and then computes and analyzes the internal flow field of the centrifugal fan to obtain the most important parameters that dominate the fan performance. Finally,these parameters are optimized for the purpose of increasing the fan pressure, reducing energy consumption and noise. The results show that the internal flow field of the optimized fan has been significantly improved, the fan efficiency has increased from 56.61% to 63.2%, and the total pressure has increased from 253.6 Pa to 266.1 Pa.
引文
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[2]李嵩,朱之墀.离心风机气动设计方法的发展及其应用[J].风机技术, 2012(4):60-67.
[3]朱之墀,唐旭东,李嵩,等.离心通风机叶轮气动设计工程方法的改进[J].风机技术,2001(3):3-8.
[4]潘地林,丁维龙,许云龙.离心式通风机蜗壳型线设计方法的理论分析与试验研究[J].流体机械, 2002, 30(4):4-7.
[5]吴玉林,陈庆光,刘树红.通风机和压缩机[M].北京,清华大学出版社,2011.
[6]商景泰.通风机手册[M].机械工业出版社, 1994.
[7]成心德.离心通风机[M].化学工业出版社, 2006.
[8]吴玉林,陈庆光,刘树红.通风机和压缩机[M].清华大学出版社,2005.
[9] Yu Z,Li S.Numerical simulation of flow field for a whole centrifugal fan and analysis of the effects of blade inlet angle and impeller gaps.Journal of HVAC&R Research. 2005, 11(2):263-283.
[10] Bian Xiaodong,Tang Xudong,Hang Dongtao,et al. Application of Numerical Simulation of the Flow Field of Centrifugal Impellers for Fan Design[J]. Tsinghua Science and Technology, 2000, 5(1):82-88.
[11] Zhu Zhichi,Huang Dongtao,Bian Xiaodong,et al.Numerical simulation and its application of impeller channel of centrifugal fans[J]. Mechanics and Engineering, 1999.