悬臂式多级离心风机气动力计算（英文）
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摘要
对一种悬臂式多级离心风机进行研究,通过改变回流器出口角和叶轮叶片进口角等参数,分析叶轮进口气流角的变化,以及对风机性能的影响。根据该风机气动力的计算结果和风机性能测试实验结果及对比分析,拟合得到了本文风机的压力—流量关系计算经验公式和流量—功率关系计算经验公式。计算结果表明:增大叶轮叶片进口角,会使压力变化曲线更平缓,减小回流器叶片出口角可以降低能耗,为悬臂式多级离心风机的设计和改进提供参考。
This paper studies the aerodynamics of the cantilever multi-stage centrifugal fan and analyzes the influences of changing the outlet geometric angle of the reflux device and the inlet geometric angle of the impeller blade on the inflow angle of the impeller and the performance of the fan. Based on the comparative analysis of the aerodynamic calculation results and the experimental results,the fitting curves and the calculating formula for the relation between pressure and flow and the relationship between power and flow were given. The results show that pressure curve of the centrifugal fan tends to be steeper by reducing the inlet geometric angle of the impeller blade,and the energy consumption increases by increasing the outlet geometric angle of the reflux device blade.In short,the paper proposes a method that can apply to the design and improvement of the cantilever multistage centrifugal fan.
This paper studies the aerodynamics of the cantilever multi-stage centrifugal fan and analyzes the influences of changing the outlet geometric angle of the reflux device and the inlet geometric angle of the impeller blade on the inflow angle of the impeller and the performance of the fan. Based on the comparative analysis of the aerodynamic calculation results and the experimental results,the fitting curves and the calculating formula for the relation between pressure and flow and the relationship between power and flow were given. The results show that pressure curve of the centrifugal fan tends to be steeper by reducing the inlet geometric angle of the impeller blade,and the energy consumption increases by increasing the outlet geometric angle of the reflux device blade.In short,the paper proposes a method that can apply to the design and improvement of the cantilever multistage centrifugal fan.
引文
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[8]JI Chunjun,LIU yang.Study on the Influence of Return Angle of Compressor on Compressor Performance[J].Compressor Blower&Fan Technology,2013(4):11-16.
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[15]XIAO Meina,XIAO Qing,DOU Huashu.Study of flow instability in a centrifugal fan based on energy gradient theory[J].Journal of Mechanical Science and Technology,2016,30(2):507-517.
[16]SHAHIN I,ALQARADAWI M,GADALA M,et al.On the aero acoustic and internal flows structure in a centrifuga compressor with hub side cavity operating at off design condition[J].Aerospace Science And Technology,2017,60:68-83.
[17]SHI Wanjing,XU Mingpeng.Study on the pre-rotation o centrifugal fan with imported guide vane[J].Chemical Machinery,2013(3):327-329.
[2]ZHANG L,WANG SL,HU C,et al.Multi-objective Optimization Design and Experimental Investigation of Centrifuga Fan Performance[J].Chinese Journal of Mechanical Engineering,2015(6):1267-1276.
[3]HUANG CH,HUNG MH.An optimal design algorithm for centrifugal fans:Theoretical and experimental studies[J].Journal of Mechanical Science And Technology,2013,27(3):761-773.
[4]LEE YT,VINEET AHUJA,ASHVIN HOSANGADI,et al.Impeller Design of a Centrifugal Fan with Blade Optimization[J].International Journal of Rotating Machinery,2011.
[5]LI Chunxi,WANG Songling,JIA Yakui.The performance of a centrifugal fan with enlarged impeller[J].Energy Conversion and Management,2011,52(8):2902-2910.
[6]SHI Shuo,HU Aijuan,ZHANG Xiaofei.Textile with multistage centrifugal fan to start the analysis and calculation[J].Compressor Blower&Fan Technology,2012(4):39-41.
[7]ZHANG Guzhong.Study on Optimization Design Method of Centrifugal Fan[J].Compressor Blower&Fan Technology,2011(5):26-30.
[8]JI Chunjun,LIU yang.Study on the Influence of Return Angle of Compressor on Compressor Performance[J].Compressor Blower&Fan Technology,2013(4):11-16.
[9]GBT 1236-2000 Industrial fans-Performance testing using standardized airways[S].The national standardization technical committee of fan.2001.
[10]ANSI/AMCA 201-07 Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating[S].American Society of Heating,Refrigerating and Air conditioning Engineers.2007.
[11]SHANG Jingtai.Ventilator Manual[M].Beijing:Machinery Industry Press,2011.
[12]HUANG Zhongyue,WANG Xiaofang,WANG Wei.Turbine Compressor[M].Beijing:Chemical Industry Press,2014.
[13]SWE WWM,MORIMATSU H,HAYASHI H,et al.Study of Unsteady Flow Simulation of Backward Impeller with Non-uniform Casing[J].Journal of Thermal Science,2017,26:208-213.
[14]ZHU Changyun,QING Guoniang.Analysis and Comparison of Internal Flows of Centrifugal Compressor Level Based on Numerical Method[J].Fluid Mechanics,2012(5):46-51.
[15]XIAO Meina,XIAO Qing,DOU Huashu.Study of flow instability in a centrifugal fan based on energy gradient theory[J].Journal of Mechanical Science and Technology,2016,30(2):507-517.
[16]SHAHIN I,ALQARADAWI M,GADALA M,et al.On the aero acoustic and internal flows structure in a centrifuga compressor with hub side cavity operating at off design condition[J].Aerospace Science And Technology,2017,60:68-83.
[17]SHI Wanjing,XU Mingpeng.Study on the pre-rotation o centrifugal fan with imported guide vane[J].Chemical Machinery,2013(3):327-329.