离心风机蜗壳出口结构优化研究
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摘要
为提高空气净化器中离心风机的风量,提出了一种基于Kriging近似模型和遗传算法的优化方法,采用正交试验的设计方法对蜗壳的出口扩张角θ、蜗舌半径r、蜗舌间隙t进行25组方案设计,并采用ANSYS FLUENT对25组蜗壳方案进行定常数值模拟,选取风机系统的风量作为优化设计目标,建立了风量与蜗壳的3个参数之间的Kriging近似模型,并用遗传算法对近似模型进行寻优,得到最优的蜗壳参数。通过对优化后的蜗壳进行仿真实验,风量提高了19.683%,同时对比优化前后的风机内部速度、总压等参数的分布,优化后的蜗壳内部速度分布更加合理,在蜗舌处的流动损失较小。提出的蜗壳优化方法对提高离心通风机性能提供了有效参考。
To increase the flow rate of the centrifugal fan used in the air purifier,an optimization process was proposed based on Kriging model and genetic algorithm. 25 sets of schemes containing the outlet angle of the volute θ,radius of tongue r and the cutoff clearance t were designed using the orthogonal experiment methods. The steady numerical simulation of the 25 sets of volute schemes was carried out using ANSYS FLUENT software. The flow rate of the fan system was selected as the optimization design objective.The Kriging approximation models between the flow rate and the three parameters of the volute were built. And,the genetic algorithm was used to optimize the approximation models to obtain the optimum parameters of the volute. By simulation tests on the optimized volute,the flow rate of the fan was increased by 19.683%.Meanwhile,by comparing the distribution of such parameters as internal speed,total pressure,of the fan before and after optimization,the velocity distribution inside the optimized volute was more reasonable and the flow loss was relatively small at the tongue.The optimization method of volute proposed can provide an effective reference for the improvement of centrifugal fan performance.
To increase the flow rate of the centrifugal fan used in the air purifier,an optimization process was proposed based on Kriging model and genetic algorithm. 25 sets of schemes containing the outlet angle of the volute θ,radius of tongue r and the cutoff clearance t were designed using the orthogonal experiment methods. The steady numerical simulation of the 25 sets of volute schemes was carried out using ANSYS FLUENT software. The flow rate of the fan system was selected as the optimization design objective.The Kriging approximation models between the flow rate and the three parameters of the volute were built. And,the genetic algorithm was used to optimize the approximation models to obtain the optimum parameters of the volute. By simulation tests on the optimized volute,the flow rate of the fan was increased by 19.683%.Meanwhile,by comparing the distribution of such parameters as internal speed,total pressure,of the fan before and after optimization,the velocity distribution inside the optimized volute was more reasonable and the flow loss was relatively small at the tongue.The optimization method of volute proposed can provide an effective reference for the improvement of centrifugal fan performance.
引文
[1]曹淑珍,祁大同,张义云,等.小流量工况下离心风机蜗壳内部的三维流动测量分析[J].西安交通大学学报,2002,36(7):688-692.
[2]鲁渝北,张义云,祁大同,等.离心通风机蜗壳内部三维流动的测量和分析[J].应用力学学报,2002,19(3):109-115.
[3]郭鹏程,罗兴锜,刘胜柱.离心泵内叶轮与蜗壳间耦合流动的三维紊流数值模拟[J].农业工程学报,2005,21(8):1-5.
[4]雷乐,谭俊飞,李景银.改变蜗壳结构对离心风机性能及噪音的影响[J].工程热物理学报,2015,V36(12):2604-2607.
[5]Qiang Xiaoqing,Jinfang.Influence of various volute designs on volute overall performance[J].Journal of Thermal Science,2010,19(6):505-513.
[6]刘晓良,袁民建,毛义军,等.前向离心风机蜗壳出口结构的数值优化[J].西安交通大学学报,2009,43(5):61-65.
[7]Huang C H,Tseng W C. An optimal volute spiral case design for centrifugal fan:theoretical and experimental studies[J].International Journal of Mechanics&Materials in Design,2016,12(2):223-240.
[8]吴亚东,曹安国,刘鹏寅,等.Pareto多目标算法在离心压缩机蜗壳优化中的[J].航空动力学报,2016,31(1):92-99.
[9]Kleijnen J P C.Kriging metamodeling in simulation:A review[J].European Journal of Operational Research,2009,192(3):707-716.
[10]Ayder E,Van d B R,Brasz J J. Experimental and theoretical analysis of the flow in a centrifugal compressor volute[J].Journal of Turbomachinery,2000,122(1):22-30.
[11]马世成,温国亮.乙二醇装置T530零效蒸发器的失效分析[J].压力容器,2018,35(9):55-59.
[12]王步美,凌娟,陈杨,等.液化石油气钢瓶爆炸失效分析[J].压力容器,2018,35(7):47-52.
[13]徐淑芳,黄国根,刘兆华,等.二氧化碳高压气瓶定期检验中水压试验泄漏失效分析[J].压力容器,2018,35(2):66-73.
[14]刘雪林,刘美平,黄飞祥.某项目核取样系统管线压力评定分析[J].压力容器,2018,35(5):60-66.
[15]毛义军,祁大同,徐长棱,等.叶片与蜗舌耦合对离心风机性能和旋转噪声影响的数值研究[J].应用力学学报,2006,23(3):368-372.
[2]鲁渝北,张义云,祁大同,等.离心通风机蜗壳内部三维流动的测量和分析[J].应用力学学报,2002,19(3):109-115.
[3]郭鹏程,罗兴锜,刘胜柱.离心泵内叶轮与蜗壳间耦合流动的三维紊流数值模拟[J].农业工程学报,2005,21(8):1-5.
[4]雷乐,谭俊飞,李景银.改变蜗壳结构对离心风机性能及噪音的影响[J].工程热物理学报,2015,V36(12):2604-2607.
[5]Qiang Xiaoqing,Jinfang.Influence of various volute designs on volute overall performance[J].Journal of Thermal Science,2010,19(6):505-513.
[6]刘晓良,袁民建,毛义军,等.前向离心风机蜗壳出口结构的数值优化[J].西安交通大学学报,2009,43(5):61-65.
[7]Huang C H,Tseng W C. An optimal volute spiral case design for centrifugal fan:theoretical and experimental studies[J].International Journal of Mechanics&Materials in Design,2016,12(2):223-240.
[8]吴亚东,曹安国,刘鹏寅,等.Pareto多目标算法在离心压缩机蜗壳优化中的[J].航空动力学报,2016,31(1):92-99.
[9]Kleijnen J P C.Kriging metamodeling in simulation:A review[J].European Journal of Operational Research,2009,192(3):707-716.
[10]Ayder E,Van d B R,Brasz J J. Experimental and theoretical analysis of the flow in a centrifugal compressor volute[J].Journal of Turbomachinery,2000,122(1):22-30.
[11]马世成,温国亮.乙二醇装置T530零效蒸发器的失效分析[J].压力容器,2018,35(9):55-59.
[12]王步美,凌娟,陈杨,等.液化石油气钢瓶爆炸失效分析[J].压力容器,2018,35(7):47-52.
[13]徐淑芳,黄国根,刘兆华,等.二氧化碳高压气瓶定期检验中水压试验泄漏失效分析[J].压力容器,2018,35(2):66-73.
[14]刘雪林,刘美平,黄飞祥.某项目核取样系统管线压力评定分析[J].压力容器,2018,35(5):60-66.
[15]毛义军,祁大同,徐长棱,等.叶片与蜗舌耦合对离心风机性能和旋转噪声影响的数值研究[J].应用力学学报,2006,23(3):368-372.