深微孔导通状况的声波导检测技术
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摘要
通过建立深微孔的声波导数学模型,确定出相应的声学边界条件,利用多物理场耦合软件建立有限元模型,分析阻塞物在孔径向的尺度对导波传输的影响特性,得到孔输出导波的强度随阻塞量增大而减小的规律,同时对阻塞物在孔内不同轴向位置对导波传输的影响特行进行分析,得出阻塞物位置对导波的传输影响较小,相对变动量小于5%这一结论。利用镍合金管模拟深微孔进行堵塞检测实验,对实验数据的处理结果表明,随着内孔堵塞量的增加,接收到的导波幅度将越来越低,这一结论一致于理论分析,从而验证了该检测技术的可行性,为其走向在线应用提供了支持。
By establishing the mathematical model of acoustic wave guide for deep micro hole,obtaining the corresponding boundary conditions,through building the finite element model in multi physical coupling software,analyzing the influence of the size of the obstruction on the guided wave propagation,acquired the relationship between the output intensity of wave guide and the scale of obstructions,moreover the analyzing of the influence of different axial position of the obstruction on the wave guide propagation suggested that the blocking position has less influence on the transmission of guided waves,and the relative variation of momentum is less than 5%. The detection experiment of blocking condition by taking nickel alloy tube as the deep micro hole,the results shows that with the increase of blocking scale,the amplitude of the guided waves will be more and more low,which is in good agreement with the theoretical analysis,by doing all of the above,the detection technology has been verified and provided supports for its application to online applications.
By establishing the mathematical model of acoustic wave guide for deep micro hole,obtaining the corresponding boundary conditions,through building the finite element model in multi physical coupling software,analyzing the influence of the size of the obstruction on the guided wave propagation,acquired the relationship between the output intensity of wave guide and the scale of obstructions,moreover the analyzing of the influence of different axial position of the obstruction on the wave guide propagation suggested that the blocking position has less influence on the transmission of guided waves,and the relative variation of momentum is less than 5%. The detection experiment of blocking condition by taking nickel alloy tube as the deep micro hole,the results shows that with the increase of blocking scale,the amplitude of the guided waves will be more and more low,which is in good agreement with the theoretical analysis,by doing all of the above,the detection technology has been verified and provided supports for its application to online applications.
引文
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[2]杨帆,朱惠人,李广超.叶片前缘气膜冷却数值模拟[J].机械设计与制造,2007(4):23-25.(Yang Fan,Zhu Hui-ren,Li Guang-chao.Numerical simulation of blade leading edge film cooling[J].Machinery Design and Manufacture,2007(4):23-25.)
[3]马兰,朱惠人,屈展.涡轮动叶表面气膜冷却换热实验研究[J].机械设计与制造,2005(8):133-135.(Ma Lan,Zhu Hui-ren,Qu Zhan.Experimental study on gas film cooling and heat transfer on the surface of turbine blade[J].Machinery Design and Manufacture,2005(8):133-135.)
[4]黄珂楠.气膜孔内局部堵塞对气膜冷却特性的影响的研究[D].南京:南京航空航天大学,2013:58-88.(Huang Ke-nan.Effect characteristics of local blocking on film cooling in gas film holes[D].Nanjing:Nanjing University of Aeronautics&Astronautics,2013:58-88.)
[5]Sridharan Ramesh,David Gomenz Ramirez.Analysis of film cooling performance of advanced tripod hole geometries with and without[J].International Journal of Heat and Mass Transfer,2015,3(84):9-18.
[6]毛军逵,胡博,苏云亮.气膜内冷通道高度对气膜孔流量系数的影响[J].航空动力学报,2011,25(3):543-550.(Mao Jun-kui,Hu Bo,Su Yun-liang.Effect of internal cooling channel height on flow coefficient of gas film holes[J].Journal of Aerospace Power,2011,25(3):543-550.)
[7]王文三.涡轮中气膜孔孔型及叶片气膜冷却的流动和冷却机理研究[D].中国科学院研究生院:工程热物理研究所,2012.(Wang Wen-san.Film cooling of gas turbine blades and film hole pass flow and cooling mechanism[D].Graduate University of Chinese Academy of Sciences:Engineering Institute of Thermal Physics,2012.)
[8]谢兴盛,颜芳,陆佳佳.红外热波无损检测技术在涡轮叶片探伤中的应用[J].红外技术,2007,29(9):552-557.(Xie Xing-sheng,Yan Fang.Lu Jia-jia.Application of infrared thermal wave nondestructive testing technology in the inspection of the turbine blade[J].Infrared Technology,2007,25(4):39-40.)
[9]刘贱平,梁丽萍,黄云.光纤测头在小型气体激光器微深孔检测中的应用[J].中国激光,2011,38(7):552-555.(Liu Jian-ping,Liang Li-ping,Huang Yun.Application of optical fiber probe in detection of small gas laser’s micro deephole[J].Chinese Jounal of Lasers,2011,8(7):552-555.)
[10]许东京.基于光通量的微孔快速检测系统的研究[D].南京:南京航空航天大学,2013.(Xu Dong-jing.Rapid detection system for micro holes based on light flux[D].Nanjing:Nanjing University of Aeronautics&Astronautics,2013.)
[11]刘斌.微小三维尺寸自动光学检测系统的关键技术研究[D].天津:天津大学,2010.(Liu Bing.Research on key technology of automatic optical inspection system for micro dimension[D].Tianjing:Tianjing University,2010.)