Monitoring of velocity profile and wall thickness in pipe flow using ultrasonic velocity profile and lamb wave technique

摘要：

　　Non-destructive monitoring and evaluation arecrucial in many engineering fields,such as chemical and nuclear power industries.Recently,ultrasound technique is widely usedin power plant for monitoring the flow rate and pipe inspection,i.e.,erosion/corrosion.These monitoring can be done independently by Time of Flight(TOF)method.For the pipe inspection(pipe wall thickness),TOF was most often used in industrial application.The measurement is done by measuring the time-of-flight of bulk waves in the material.Also,plate thickness can be measured with the photoacoustic excitation of Lamb waves.Lamb waves velocity depends on the thickness of the material plate.Therefore,a measure of the velocity of the Lamb wave yields a measure of the average plate thickness between transmitter and receiver.For the flow rate measurement,however,TOF methods needs calibration.Therefore,another technique,which is based on Doppler shift frequency,was developed.In the previous study,monitoring of both flow rate and the plate thickness is not performed simultaneously.Thus,in this study,the simultaneous monitoring of both velocity and pipe thickness is performedconcurrently.Lamb wave tomography and Doppler shift frequency are utilized for pipe thickness and flow rate measurement.For velocity measurement,only one transducer is used as both transmitter and receiver.However,for plate thickness measurement,additional receiver transducer is placed downstream the flaw.Also,the effect of pipe thickness on velocity profile will be discussed further.

作者: Weichen ZHANG Xingguo WANG Ari HAMDANI Hiroshige KIKURA Junjie CHANG Yasuhiko OHGIYA

作者单位: Laboratory for Advanced Nuclear Energy,Tokyo Institute of Technology,2 Chome-12-1,Ookayama.Meguroku, Laboratory for Advanced Nuclear Energy,Tokyo Institute of Technology,2 Chome-12-1,Ookayama.Meguroku, Key Lab of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,Nanchang 330063 Graduate school of Engineering,Nagasaki University,Nagasaki,8528521,Japan

会议类型: 国际会议

会议名称: 5th International Symposium on Materials and Reliability in Nuclear Power Plants & Symposium on Water Chemistry and Corrosion in Nuclear Power Plants in Asia-2017 & 3rd Asian Forum on Material Aging Issues in Nuclear System(2017第五届核电厂材料与安全可靠性国际研讨会 )

会议地点: 沈阳

会议语种:英文

页码: 347-360

在线出版日期: 2017-09-26（万方平台首次上网日期，不代表论文的发表时间）