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浙江大学学报(工学版)
浙江大学学报(工学版)
能源工程与动力工程     
腔径比对亥姆赫兹自振射流性能影响
方珍龙,康勇,王晓川,刘文川,李登,周勇祥
1. 武汉大学 动力与机械学院,湖北 武汉 430072; 
2. 水射流理论与新技术湖北省重点实验室,湖北 武汉 430072
Numerical investigation of cavity diameter ratio influence on Helmholtz oscillation waterjet
FANG Zhen long, KANG Yong, WANG Xiao chuan, LIU Wen chuan,LI Deng, ZHOU Yong xiang
1.School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China;
2.Key Laboratory of Hubei Province for Water Jet Theory and New Technology, Wuhan University, Wuhan 430072, China
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摘要：

为了提高亥姆赫兹式自振射流的工作能力，采用大涡模拟对自振射流流动特性进行研究，通过实验测试喷嘴出口压力脉动验证了数值模拟的准确性.对4种腔径比的自振喷嘴模型在3种雷诺数下的瞬态流场进行模拟，分析Q准则数下拟序结构涡的运动特性，揭示轴心速度衰减及出口断面速度分布与射流集束性及腔室能量耗散的关系，比较分析振荡幅值对射流脉冲性能的影响.结论表明，大涡模拟可以准确预测自激振荡射流瞬态流场及流动特性，亥姆赫兹腔使均匀来流变得紊乱，涡尺度增大，腔室内能量耗散增大，且腔径比对自振射流影响较大.
Abstract:

Large eddy simulation(LES) was conducted to investigate its flow characteristics in order to improve the working ability of Helmholtz self-excited oscillation pulsed jet(SOPJ).  The reliability of numerical simulation was verified by experimentally measuring the pulsating pressures at nozzle outlet. The results of four models of different cavity diameter ratios were analyzed under three Reynolds numbers. The vortex motion characteristics were investigated by considering the coherent structrue (Q criteria number). The fluidic beam concentration and energy dissipation in the chamber were evaluated based on the axial velocity attenuation and velocity distribution profiles. The pulse performance was analyzed according to the oscillation amplitude. Results show that LES can reasonably simulate the unsteady flow field of SOPJ. Helmholtz cavity turns uniform flow into turbulence flow, the scale of verity increases, and the energy dissipation inside the cavity can be intensified.  The ratio of cavity diameter to jet diameter is of great significance.
出版日期: 2016-11-01
:  TG 137  
基金资助:

国家“973”重点基础研究发展计划资助项目(2014CB239203)、国家自然科学基金资助项目(51474158)、教育部新世纪优秀人才支持计划资助项目（NCET-12-0424).
通讯作者: 康勇，男，教授，博导. ORCID：0000-0003-0991-5314.   
作者简介: 方珍龙（1989-），男，博士生，从事水射流理论及其应用的研究. ORCID：0000-0002-0457-4461. E-mail: fangzhenlong@whu.edu.cn
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引用本文:

方珍龙,康勇,王晓川,刘文川,李登,周勇祥. 腔径比对亥姆赫兹自振射流性能影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.11.009.

FANG Zhen long, KANG Yong, WANG Xiao chuan, LIU Wen chuan,LI Deng, ZHOU Yong xiang. Numerical investigation of cavity diameter ratio influence on Helmholtz oscillation waterjet. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.11.009.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.11.009    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I11/2100

［1］ ROCKWELL D， NAUDASCHER E. SelfSustained oscillations of impinging free shear layers ［J］. Annual Review of Fluid Mechanics, 1979, 11: 67-94．
［2］ ROCKWELL D, NAUDASCHER E. Review: selfsustaining oscillations of flow past cavities［J］. Journal of Fluids EngineeringTransactions of the ASME, 1978, 100(2): 152-165．
［3］ TUNA B A,  ROCKWELL D. Selfsustained oscillations of shallow flow past sequential cavitie ［J］. Journal of Fluid Mechanics, 2014, 758: 655-685．
［4］ MOREL T. Experimental study of a jetdriven helmholtz oscillator［J］. Journal of Fluids Engineeringtransactions of the ASME, 1979, 101(3): 383-390．
［5］ MAUREL A, ERN P, ZIELINSKA B J A, et al. Experimental study of selfsustained oscillations in a confined jet［J］. Physical Review E, 1996, 54(4): 3643-3651．
［6］ KOLSEK T,JELIC N, DUHOVNIK J. Numerical study of flow asymmetry and selfsustained jet oscillations in geometrically symmetric cavities［J］. Applied Mathematical Modelling, 2007, 31(10): 2355-2373．
［7］ 唐川林,廖振方.自激振动脉冲射流装置的理论分析和实验研究［J］.煤炭学报,1989,1: 90-100．
TANG Chuanlin, LIAO Zhenfang. Theoretical analysis and experimental study a selfexcited oscillation pulsed jet device ［J］. Journl of China Coal Society, 1989, 1: 90100．
［8］ 沈忠厚,李根生,周长山.牙轮钻头自激振荡脉冲喷嘴的实验研究［J］.石油大学学报:自然科学版,1991,3: 36-43．
SHEN Zhonghou, LI Gensheng, ZHOU Changshan. Experimental study on selfexcited resonant pulse jet nozzle for roler bit［J］. Journal of the University of Petroleum,China, 1991, 3: 36-43．
［9］ 李晓红,杨林,王建生,等.自激振荡脉冲射流装置的固有频率特性［J］.煤炭学报,2000,6: 641-644．
LI Xiaohong, YANG Lin, WANG Jiansheng, et al. The natural frequency characteristic of the selfexcited oscilation pulsed water jet device ［J］. Journl of China Coal Society, 2000, 6: 641-644．
［10］ 李江云,徐如良,王乐勤. 自激脉冲喷嘴发生机理数值模拟［J］.工程热物理学报,2004,25(2):241-243．
LI Jiangyun, XU Ruliang, WANG Leqin. Numerical simulation of mechanism of the selfexcited pulse nozzle ［J］. Journal of Engineering Thermophysics, 2004, 25(2): 241243．
［11］ 王循明,焦磊,王乐勤.自激脉冲发生机理数值模拟及参数影响分析［J］.浙江大学学报:工学版,2005,39(9): 176-180．
WANG Xunming, JIAO Lei, WANG Leqin. Numerical simulation of selfexcited oscillation pulsed jet and analysis of parameters influence ［J］. Journal of Zhejiang University∶Engineering Science, 2005, 39(9):176-180．
［12］ 唐川林,胡东,裴江红.自激振荡脉冲射流喷嘴频率特性实验研究［J］.石油学报,2007,28(04):122-125．
TANG Chuanlin, HU Dong, PEI Jianghong. Experimental study on the frequency characteristic of selfexcited oscillation pulsed nozzle ［J］. Acta Petrolei Sinica, 2007, 28(04):122-125．
［13］ 高传昌,黄晓亮,赵礼,等. 不同围压下自激吸气式脉冲射流装置性能试验研究［J］.应用基础与工程科学学报,2011,19(6): 971-977．
GAO Chuanchang, HUANG Xiaoliang, ZHAO Li, et al. Experimental research on performance of selfexcited inspiratory pulsed jet device under different ambient pressures ［J］. Journal of Basic Science and Engineering, 2011, 19(6):971-977．
［14］ 葛兆龙,周哲,卢义玉,等. 影响自激振荡脉冲射流性能的喷嘴结构参数研究［J］.四川大学学报:工程科学版,2013,45(5):160-165．
GE Zhaolong, ZHOU Zhe, LU Yiyu, et al. Study on the nozzle structure parameters affecting the performance of selfexcited oscillation pulsed jet ［J］. Journal of Sichuan University∶Engineering Science Edition, 2013, 45(5): 160-165．
［15］ 李根生,沈忠厚.自振空化射流理论与应用［M］. 东营:中国石油大学出版社,2007:106-108．
［16］ 张兆顺,崔桂香,许春晓.湍流大涡数值模拟的理论及应用［M］. 北京:清华大学出版社,2008:54-89．
［17］ GERMANO M, PIOMELLI U, MOIN P, et al. A dynamic subgridscale eddy viscosity model［J］. Physics of Fluids AFluid Dynamics, 1991. 3(7):1760-1765．
［18］ SMOGORINSKY J. General circulation experiments with the primitive equations I:The basic experiment ［J］. Monthly Weather Review, 1963, 91(3):99-164．
［19］ LILLY D K. A proposed modification of the Germanosubgridscale closure method ［J］. Physics of Fluids AFluid Dynamics, 1992, 4(3): 633-635．
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