压电风扇结构设计与参数影响研究
|
摘要
压电风扇主要包括由压电材料制作的驱动器和振动薄片,驱动器激励振动薄片振动进而产生气流流动,是一种新型的散热装置。研究多种参数对压电风扇性能的影响,为压电风扇的设计提供指导性的意见和建议。使用计算流体方法,模拟压电风扇流场的发展过程,研究了压电风扇振动薄片的振型、双振动薄片的排布形式以及在每种排布形式下两振动薄片振动相位差等因素对出口风速的影响。得到以下结论:驱动器的激振频率应等于振动薄片的一阶固有频率;双振动薄片模型,两振动薄片的最佳振动相位差分别是π(纵向布置)和0.8π(横向布置)。通过分析流场发展过程,给出了参数影响的成因。
A piezoelectric fan mainly consists of vibrating plate and actuator made by piezoelectric material. Vibrating plates are driven by actuators to cause fluid motion,which is a new kind of device for removal of heat. The purpose of this research is to investigate the influence of several parameters on the performance of piezoelectric fans and give advice to the design of piezoelectric fans. The method of computational fluid dynamics is used in this research to simulate the development of piezoelectric fan's flow field. Three parameters are studied including flexural modes of vibrating plates,double-plate orientation and phase difference between two plates. The results are as follows: the frequency of actuator should be equal to the fundamental resonance frequency of vibrating plate; for the models with two vibrating plates,the best phase difference is π( plates oriented in vertical direction) and 0. 8π( plates oriented in horizontal direction). The cause of parameter influence is presented through analyzing the development of the flow field.
A piezoelectric fan mainly consists of vibrating plate and actuator made by piezoelectric material. Vibrating plates are driven by actuators to cause fluid motion,which is a new kind of device for removal of heat. The purpose of this research is to investigate the influence of several parameters on the performance of piezoelectric fans and give advice to the design of piezoelectric fans. The method of computational fluid dynamics is used in this research to simulate the development of piezoelectric fan's flow field. Three parameters are studied including flexural modes of vibrating plates,double-plate orientation and phase difference between two plates. The results are as follows: the frequency of actuator should be equal to the fundamental resonance frequency of vibrating plate; for the models with two vibrating plates,the best phase difference is π( plates oriented in vertical direction) and 0. 8π( plates oriented in horizontal direction). The cause of parameter influence is presented through analyzing the development of the flow field.
引文
[1]TODA M.Theory of air flow generation by a resonant type PVFbimorph cantilever vibrator[J].Ferroelectrics,1978,22(1)911-918.
[2]KIM Y H,WERELEY S T,CHUN C H.Phase-resolved flow field produced by a vibrating cantilever plate between two endplates[J].Physics of Fluids(1994-present),2003,16(1):145-162.
[3]KIMBER M,GARIMELLA S V,RAMAN A.Local heat transfe coefficients induced by piezoelectrically actuated vibrating cantilevers[J].Journal of Heat Transfer,2007,129(9):1168-1176.
[4]KIMBER M,GARIMELLA S V,RAMAN A.An experimenta study of fluidic coupling between multiple piezoelectric fans[C]∥10th Intersociety Conference on Thermal and Thermomechanical Phenomena and Emerging Technologies in Electronic Systems,ITherm 2006.Piscataway,NJ:IEEE Press,2006:333-340.
[5]YOO J H,HONG J I,CAO W.Piezoelectric ceramic bimorph coupled to thin metal plate as cooling fan for electronic devices[J].Sensors and Actuators A:Physical,2000,79(1):8-12.
[6]WU T,RO P I.Heat transfer performance of a cooling system using vibrating piezoelectric beams[J].Journal of Micromechanics and Microengineering,2005,15(1):213-220.
[7]FLORIO L A,HARNOY A.Combination technique for improving natural convection cooling in electronics[J].Internationa Journal of Thermal Sciences,2007,46(1):76-92.
[8]AIKALIN T,GARIMELLA S V,RAMAN A,et al.Characterization and optimization of the thermal performance of miniature piezoelectric fans[J].International Journal of Heat and Fluid Flow,2007,28(4):806-820.
[9]AIKALIN T,WAIT S M,GARIMELLA S V,et al.Experimental investigation of the thermal performance of piezoelectric fans[J].Heat Transfer Engineering,2004,25(1):4-14.
[10]SCHMIDT R R.Local and average transfer coefficients on a vertical surface due to convection from a piezoelectric fan[C]∥Proceedings of the Intersociety Conference on Thermal Phenomena in Electronic Systems.Piscataway,NJ:IEEE Press,1994:41-49.
[11]贾丽杰,李敏,陈伟民.压电驱动器应变传递模型分析[J].工程力学,2010,27(8):205-210.JIA L J,LI M,CHEN W M.The model analysis of strain transfer in the application of piezoelectric actuators[J].Engineering Mechanics,2010,27(8):205-210(in Chinese).
[12]QURESHI E M,SHEN X,CHEN J J.Vibration control laws via shunted piezoelectric transducers:A review[J].International Journal of Aeronautical and Space Sciences,2014,15(1):1-19.
[13]朱熹育,王社良,朱军强.基于Sugeno型模糊神经网络的空间杆系结构的压电驱动器主动控制[J].工程力学,2013,30(8):272-277.ZHU X Y,WANG S L,ZHU J Q.Sugeno-type fuzzy neural network active control of space frame structure based on piezoelectric actuator[J].Engineering Mechanics,2013,30(8):272-277(in Chinese).
[14]谭蕾,谭晓茗,张靖周.压电风扇激励非定常流动和换热特性数值研究[J].航空学报,2013,34(6):1277-1284.TAN L,TAN X M,ZHANG J Z.Numerical investigation on unsteady flow and heat transfer characteristics of piezoelectric fan[J].Acta Aeronautica et Astronautica Sinica,2013,34(6):1277-1284(in Chinese).
[15]孔岳,李敏,吴蒙蒙.压电风扇非定常流场速度分布的数值研究[J].工程力学,2016,33(1):209-216.KONG Y,LI M,WU M M.Numerical investigation on the velocity of unsteady flow field induced by piezoelectric fan[J].Engineering Mechanics,2016,33(1):209-216(in Chinese).
[16]HU H,CLEMONS L,IGARASHI H.An experimental study of the unsteady vortex structures in the wake of a root-fixed flapping wing[J].Experiments in Fluids,2011,51(2):347-359.
[17]刑誉峰,李敏.工程振动基础[M].2版.北京:北京航空航天大学出版社,2011:136-144.XING Y F,LI M.Engineering vibration[M].2nd ed.Beijing:Beihang University Press,2011:136-144(in Chinese).
[2]KIM Y H,WERELEY S T,CHUN C H.Phase-resolved flow field produced by a vibrating cantilever plate between two endplates[J].Physics of Fluids(1994-present),2003,16(1):145-162.
[3]KIMBER M,GARIMELLA S V,RAMAN A.Local heat transfe coefficients induced by piezoelectrically actuated vibrating cantilevers[J].Journal of Heat Transfer,2007,129(9):1168-1176.
[4]KIMBER M,GARIMELLA S V,RAMAN A.An experimenta study of fluidic coupling between multiple piezoelectric fans[C]∥10th Intersociety Conference on Thermal and Thermomechanical Phenomena and Emerging Technologies in Electronic Systems,ITherm 2006.Piscataway,NJ:IEEE Press,2006:333-340.
[5]YOO J H,HONG J I,CAO W.Piezoelectric ceramic bimorph coupled to thin metal plate as cooling fan for electronic devices[J].Sensors and Actuators A:Physical,2000,79(1):8-12.
[6]WU T,RO P I.Heat transfer performance of a cooling system using vibrating piezoelectric beams[J].Journal of Micromechanics and Microengineering,2005,15(1):213-220.
[7]FLORIO L A,HARNOY A.Combination technique for improving natural convection cooling in electronics[J].Internationa Journal of Thermal Sciences,2007,46(1):76-92.
[8]AIKALIN T,GARIMELLA S V,RAMAN A,et al.Characterization and optimization of the thermal performance of miniature piezoelectric fans[J].International Journal of Heat and Fluid Flow,2007,28(4):806-820.
[9]AIKALIN T,WAIT S M,GARIMELLA S V,et al.Experimental investigation of the thermal performance of piezoelectric fans[J].Heat Transfer Engineering,2004,25(1):4-14.
[10]SCHMIDT R R.Local and average transfer coefficients on a vertical surface due to convection from a piezoelectric fan[C]∥Proceedings of the Intersociety Conference on Thermal Phenomena in Electronic Systems.Piscataway,NJ:IEEE Press,1994:41-49.
[11]贾丽杰,李敏,陈伟民.压电驱动器应变传递模型分析[J].工程力学,2010,27(8):205-210.JIA L J,LI M,CHEN W M.The model analysis of strain transfer in the application of piezoelectric actuators[J].Engineering Mechanics,2010,27(8):205-210(in Chinese).
[12]QURESHI E M,SHEN X,CHEN J J.Vibration control laws via shunted piezoelectric transducers:A review[J].International Journal of Aeronautical and Space Sciences,2014,15(1):1-19.
[13]朱熹育,王社良,朱军强.基于Sugeno型模糊神经网络的空间杆系结构的压电驱动器主动控制[J].工程力学,2013,30(8):272-277.ZHU X Y,WANG S L,ZHU J Q.Sugeno-type fuzzy neural network active control of space frame structure based on piezoelectric actuator[J].Engineering Mechanics,2013,30(8):272-277(in Chinese).
[14]谭蕾,谭晓茗,张靖周.压电风扇激励非定常流动和换热特性数值研究[J].航空学报,2013,34(6):1277-1284.TAN L,TAN X M,ZHANG J Z.Numerical investigation on unsteady flow and heat transfer characteristics of piezoelectric fan[J].Acta Aeronautica et Astronautica Sinica,2013,34(6):1277-1284(in Chinese).
[15]孔岳,李敏,吴蒙蒙.压电风扇非定常流场速度分布的数值研究[J].工程力学,2016,33(1):209-216.KONG Y,LI M,WU M M.Numerical investigation on the velocity of unsteady flow field induced by piezoelectric fan[J].Engineering Mechanics,2016,33(1):209-216(in Chinese).
[16]HU H,CLEMONS L,IGARASHI H.An experimental study of the unsteady vortex structures in the wake of a root-fixed flapping wing[J].Experiments in Fluids,2011,51(2):347-359.
[17]刑誉峰,李敏.工程振动基础[M].2版.北京:北京航空航天大学出版社,2011:136-144.XING Y F,LI M.Engineering vibration[M].2nd ed.Beijing:Beihang University Press,2011:136-144(in Chinese).