蜗壳及叶片外形对双吸式多翼离心风机性能影响的试验研究
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摘要
以某款效率低、全压低的双吸式多翼离心风机为实验对象,通过试验研究蜗壳型线,叶片外形以及增加叶片数对风机性能的影响。试验结果表明:蜗壳型线的变化趋势对双吸式多翼离心风机的性能有着很大的影响,良好的蜗壳型线不仅提高了风机效率以及全压,还改变了流量-压力曲线的变化趋势;相比原风机,采用改型蜗壳及改型叶轮的方案2风机能够大幅提升风机性能,使效率提升幅度达到10.93%,风机全压提升近40Pa;当叶片数从46片增加至56片,风机在大流量工况下提升了风机静压,但风机效率会略有下降。
The effect of the volute and blade profile and the blade number on the performance of multi-blade centrifugal fan with a low efficiency and total pressure is investigated by an experimental method. The study results show that changing the volute profile has a great impact on the performance of the multi-blade centrifugal fan. An optimized volute profile can not only improve the efficiency and total pressure of the fan, but also reduces variations in the performance curve. A modification of volute and impeller can greatly enhance the performace of the fan, Compared to the originial fan the efficiency is increased by 10.93% and the total pressure by 40 Pa. When the blade number is increased from 46 to 56, the static pressure is enhanced,but the efficiency is slightly decreased.
The effect of the volute and blade profile and the blade number on the performance of multi-blade centrifugal fan with a low efficiency and total pressure is investigated by an experimental method. The study results show that changing the volute profile has a great impact on the performance of the multi-blade centrifugal fan. An optimized volute profile can not only improve the efficiency and total pressure of the fan, but also reduces variations in the performance curve. A modification of volute and impeller can greatly enhance the performace of the fan, Compared to the originial fan the efficiency is increased by 10.93% and the total pressure by 40 Pa. When the blade number is increased from 46 to 56, the static pressure is enhanced,but the efficiency is slightly decreased.
引文
[1]王嘉冰,区颖达.多翼离心风机的内流特性及其噪声研究[J].流体机械,2004,32(4):29-33.
[2]刘路,姜献锋.多翼离心风机主要部件对风机流动特性影响的研究现状[J].轻工机械,2009,27(5):4-7.
[3]刘小民,汤虎.多翼离心风机叶片出口安装角对吸油烟机性能影响的实验研究[J].风机技术,2014(6):22-25.
[4]王瑞,王灿星.控制速度分布的多翼离心风机优化设计[J]风机技术,2013(3):47-52.
[5]祁大同,姚承范,朱营康,等.离心风机蜗壳型线的改进设计与实验[J].流体机械,1995,23(9):9-12.
[6]宋宝军,谢文霞.离心风机蜗壳型线设计方法探讨[J].应用能源技术,2015(1):33-36.
[7]杨昕,陈望明,袁民建,等.改变叶轮与蜗壳相对安装位置对双吸多翼风机性能影响的试验研究[J]流体机械,2011,39(7):1-5.
[8]Kwang-Yong Kim,Seoung-Jin Seo.Shape Optimization of Forward Curved Blade Centrifugal Fan with Navier-Stokes Analysis[J].Journal of Fluids Engineering,2004,126:735-742.
[9]丁骏,杜鑫,张龙新.蜗壳开度对离心风机气动性能影响的研究[J].风机技术,2012(5):22-26.
[10]Hidechito Haysshi,Flow Characteristics in Scroll Casing of Sirocco Fan,The 10th Asian International Conference on Fluid Machinery,2010,100-108.
[2]刘路,姜献锋.多翼离心风机主要部件对风机流动特性影响的研究现状[J].轻工机械,2009,27(5):4-7.
[3]刘小民,汤虎.多翼离心风机叶片出口安装角对吸油烟机性能影响的实验研究[J].风机技术,2014(6):22-25.
[4]王瑞,王灿星.控制速度分布的多翼离心风机优化设计[J]风机技术,2013(3):47-52.
[5]祁大同,姚承范,朱营康,等.离心风机蜗壳型线的改进设计与实验[J].流体机械,1995,23(9):9-12.
[6]宋宝军,谢文霞.离心风机蜗壳型线设计方法探讨[J].应用能源技术,2015(1):33-36.
[7]杨昕,陈望明,袁民建,等.改变叶轮与蜗壳相对安装位置对双吸多翼风机性能影响的试验研究[J]流体机械,2011,39(7):1-5.
[8]Kwang-Yong Kim,Seoung-Jin Seo.Shape Optimization of Forward Curved Blade Centrifugal Fan with Navier-Stokes Analysis[J].Journal of Fluids Engineering,2004,126:735-742.
[9]丁骏,杜鑫,张龙新.蜗壳开度对离心风机气动性能影响的研究[J].风机技术,2012(5):22-26.
[10]Hidechito Haysshi,Flow Characteristics in Scroll Casing of Sirocco Fan,The 10th Asian International Conference on Fluid Machinery,2010,100-108.