基于反声降噪的风机管道流场优化与节能应用
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摘要
竖直进风管道本身具有一定的流场设计缺陷,增大了管道通风阻力,而为实现风机降噪所增设的进风消声器又进一步增大了风机能耗。采用反声降噪与流场优化相结合的方法对风机管道进行改进设计,使管道本身具有一定的消声性能,并通过改善管道流场,降低通风阻力,实现风机节能。数值分析及示范项目应用显示:管道反声降噪与流场优化改进后,消声节能管道能达到普通阻性消声器的消声效果,并能使风机效率提高10%以上。该种消声节能管道结构简单、环境适应性强、维护成本低,具有极好的推广应用前景。
The vertical blast pipe has certain flow field design defect which results in the increase of draft loss. However,the muffler installed to reduce the noise accelerates the power consumption of fan. Improved design of fan pipes combines anti-noise and flow field optimization,which makes pipe itself has a certain muffling performance. The energy saving of fan is achieved by improving the flow field of the pipe and reducing the draft loss. Numerical analysis and demonstration project application show that after the anti-noise and flow field optimization of the fan pipe,the muffling energy-saving pipe can achieve the muffling effect as ordinary mufflers,and increase the efficiency of the fan by more than 10%. This pipe has the advantages of simple structure,good environmental adaptability,low maintenance cost,excellent application and promotion prospects.
The vertical blast pipe has certain flow field design defect which results in the increase of draft loss. However,the muffler installed to reduce the noise accelerates the power consumption of fan. Improved design of fan pipes combines anti-noise and flow field optimization,which makes pipe itself has a certain muffling performance. The energy saving of fan is achieved by improving the flow field of the pipe and reducing the draft loss. Numerical analysis and demonstration project application show that after the anti-noise and flow field optimization of the fan pipe,the muffling energy-saving pipe can achieve the muffling effect as ordinary mufflers,and increase the efficiency of the fan by more than 10%. This pipe has the advantages of simple structure,good environmental adaptability,low maintenance cost,excellent application and promotion prospects.
引文
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[15]刘刚,曹勇,翟建超.风机单位风量耗功率的理论分析和实测研究[J].暖通空调,2011,41(12):7-10.
[16]通风机能效限定值及节能评价值:GB 19761-2005[S].
[2]戴根华,田瑞,李鹭,等.带旁通的管道中的声能流及传声损失Ⅰ:理论分析[J].声学学报,1995,20(4):244-249.
[3]田瑞,朱之墀,李嵩,等.旁通管反声降噪应用研究[J].声学学报,1997,22(4):314-322.
[4]李振法,田瑞,汪建文,等.低速流动管道反声降噪应用研究[J].内蒙古工业大学学报(自然科学版),2000,19(4):276-279.
[5]董为民,李功宇,尹红.HQ管反声消声器的仿真分析及实验研究[J].噪声与振动控制,2004,24(2):34-37.
[6]CAGNA M,BOEHLE M.Application of CFD methods for the simulation of the flow through a filter in dependency of the operating time[J].Fluids Engineering Division,2002(1):1013-1017.
[7]SUDO K,SUNIDA M,HIBARA H.Experimental investigation on turbulent flow in a circular-sectioned 90-degree bend[J].Experiments in Fluids,1998,25(1):42-49.
[8]胡艳华,时铭显.90°方弯管内气相流场的数值模拟与分析[J].石油机械,2007,35(8):9-12.
[9]周振起,赵海,宋同辉,等.直接空冷机组排汽管道内加装导流片的流场的数值模拟[J].流体机械,2011,39(9):82-85.
[10]王福军.计算流体动力学分析:CFD软件原理与应用[M].北京:清华大学出版社,2004:113-126.
[11]韩占忠.Fluent:流体工程仿真计算实例与分析[M].北京:北京理工大学出版社,2004:4-31.
[12]继魁昌.风机手册[M].北京:机械工业出版社,1995:18-23.
[13]詹福良,徐俊伟.Virtural.Lab Acoustic声学仿真计算从入门到精通[M].西安:西北工业大学出版社,2013:22-104.
[14]潘仲麟,翟国庆.噪声控制技术[M].北京:化学工业出版社,2006:131-156.
[15]刘刚,曹勇,翟建超.风机单位风量耗功率的理论分析和实测研究[J].暖通空调,2011,41(12):7-10.
[16]通风机能效限定值及节能评价值:GB 19761-2005[S].