A method based on a novel flow pattern model for the flow adaptability study of ultrasonic flowmeter |
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| Affiliation: | 1. Department of Mechanical Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan (NMIJ), Tsukuba Central 3, 1-1-1 Umezono, Tsukuba 305-8563, Japan;1. Scientist ‘C’ Central Water & Power Research Station, Pune 411024, India;2. Mechanical Engineering Department, Vishwakarma Institute of Technology, Pune 411037, India;3. Vishwakarma Institute of Technology, Pune 411037, India;1. College of Information & Control Engineering, China University of Petroleum, Qingdao, China;2. Research & Development Flow, Endress+Hauser Flowtec AG, Switzerland;1. The State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, Hangzhou, China;2. Fiber and Polymer Science Program, North Carolina State University, Raleigh, USA |
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| Abstract: | Ultrasonic flowmeters are widely used in industry for accurate measurement. Flow adaptabilities of meters in non-ideal flow fields are usually concerned about by researchers. This paper presents a theoretical analysis method to study the measurement performance of ultrasonic flowmeter. For the specific water flow in single elbow pipe, a novel three-dimensional flow pattern model is invented by the trust region Newton algorithm based on computational fluid dynamics simulation results. In order to verify the correctness of the model, a typical ultrasonic flowmeter with single diametric acoustic path is mainly analyzed. By comparing flow adaptabilities of the meter downstream of the single elbow with both the novel theoretic model analysis approach and simulation method, good agreement is achieved. It is indicated that both the three-dimensional model and its invention method are valid for this study, which is not only helpful to get knowledge of characteristics of disturbed flows, but also provides a practical method to study the flow adaptability of ultrasonic flowmeter in non-ideal flow fields. |
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