跳至主要内容

Comparison between Numerical and Experimental for UVP Measurement in Double Bent Pipe with Out-of-Plane Angle

Read full paper at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50709#.VEmmEFfHRK0

Twin vortices flow behavior with out-of-plane angle effect in double bent pipe system is studied numerically and experimentally. Double bent pipe system generates very complicated flow behavior including twin vortices in the downstream of the double bent. Moreover, angle from the plane of the double bent forms more complicated flow behavior due to the flow twist by out-of-plane angle. In this study, numerical analysis is examined for this double bent system using three-dimensional CFD code, FLUENT, to reproduce those complicated flow behaviors with twin vortices. Numerical results are compared with experimental results obtained by Ultrasonic Velocity Profiler (UVP). Discrepancy between numerical and experimental result is discussed changing out-of- plane angle, α. Velocity profiles obtained by numerical results are converted into UVP profiles, and they are compared with the experimental results by UVP. Consequently, velocity behavior especially around the pipe wall obtained by numerical results is agreed with experimental results.
Cite this paper
Tsuzuki, N. , Weerachon, T. and Kikura, H. (2014) Comparison between Numerical and Experimental for UVP Measurement in Double Bent Pipe with Out-of-Plane Angle. Journal of Flow Control, Measurement & Visualization, 2, 154-164. doi: 10.4236/jfcmv.2014.24017. 
 

[1] Mattingly, G.E. and Yeh, T.T. (1991) Effect of Pipe Elbows and Tube Bundles on Selected Types of Flowmeters. Flow measurement and Instruments, 2, 4-13.
http://dx.doi.org/10.1016/0955-5986(91)90050-2
[2] Takeda, Y. (1995) Velocity Profile Measurement by Ultrasonic Doppler Method. Experimental Thermal and Fluid Science, 10, 444-453. http://dx.doi.org/10.1016/0894-1777(94)00124-Q
[3] Takeda, Y., Furuichi, N., Mori, M., Aritomi, M. and Kikura, H. (2000) Development of a New Flow Metering System Using UVP. Preliminary Performance Assessments Using NIST flow Standards. ASME Fluids Engineering Division Summer Meeting.
[4] Mori, M., Takeda, Y., Taishi, T., Furuichi, N., Aritomi, M. and Kikura, H. (2002) Development of a Novel Flow Meter System Using Ultrasonic Velocity Profile Measurement. Experiments in Fluids, 32, 153-160.
[5] Wada, S., Kikura, H., Aritomi, M., Mori, M. and Takeda, Y. (2004) Student Program—Development of Pulse Ultrasonic Doppler Method for Flow Rate Measurement in Power Plant Multilines Flow Rate Measurement on Metal Pipe. Journal of Nuclear Science and Technology, 41, 339-346.
http://dx.doi.org/10.1080/18811248.2004.9715493
[6] Treenuson, W., Tsuzuki, N., Kikura, H., Aritomi, M., Wada, S. and Tezuka, K. (2013) Accurate Flowrate Measurement on the Double Bent Pipe Using Ultrasonic Velocity Profile Method. The Japanese Society for Experimental Mechanics, 13, 200-211.
[7] Treenuson, W., Tsuzuki, N., Kikura, H. and Wada, S. (2014) Effect of Out-of-Plane Double Bent Pipe on Ultrasonic Flow Metering. Proceedings of SPIE, to be published.
[8] Yuki, K., Hasegawa, S., Sato, T., Hashizume, H., Aizawa, K. and Yamano H. (2011) Matched Refractive-Index PIV Visualization of Complex Flow Structure in a Three-dimensionally Connected Dual Elbow. Nuclear Engineering and Design, 241, 4544-4550. http://dx.doi.org/10.1016/j.nucengdes.2010.12.026
[9] Yuki, K., Hasegawa, S., Sato, T., Hashizume, H., Aizawa, K. and Yamano, H. (2009) Unsteady Hydraulic Characteristics in Large-diameter Pipings with Elbow for JSFR. 3. Flow Structure in a 3-dimensionally Connected Dual Elbow Simulating Cold-Leg Piping in JSFR. Proceedings of 13th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-13).
[10] Takeda, Y. (2012) Ultrasonic Doppler Velocity Profiler for Fluid Flow. Springer, Japan.
http://dx.doi.org/10.1007/978-4-431-54026-7
[11] NIST (2010) Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties—REFPROP ver 9.0.NIST, US.         eww141024lx
标签：

评论

发表评论

此博客中的热门博文

Does Immigration Promote the Investment of the Monopolistic Firm?

In the present paper, we examine the effect of increasing uncertainty of immigrants’ growth on the optimal timing of investment of a firm that has a monopolistic power over the labor market. It is revealed that when the uncertainty of immigrants’ growth is more than a threshold level, increasing uncertainty of immigrants’ growth accelerates the optimal timing of firms’ investment and enhances the economic growth, even if the uncertainty of immigrants’ growth is formulated by the geometric Brownian motion, which is in sharp contrast to the standard result that an increase in the uncertainty postpones the optimal timing. With an increase in the immigrants over the past ten years, workforces in the host countries have been growing significantly to the extent that the immigrants represent 70% of the increase in the workforce in Europe, and 47% in the United States as OECD indicates. In the present paper, we attempted to investigate the effect of increased uncertainty caused by the growi...
发表评论
阅读全文

Education Policy Implementation: A Mechanism for Enhancing Primary Education Development in Zanzibar

Education is one of the fundamental rights of individuals; therefore, the government of a country needs to develop and strengthen educational policy and quality as well as to ensure that everyone has equal access to basic education. The improvement of access and quality of education in the world is becoming as an essential factor in development, whereas the basic education (primary school), is acknowledged as a foundation of the higher educational development for every country. To fulfill this goal, governments introduce several policies and procedures; however, it requires some reforms and participation from the politician, policymakers, and other stakeholders to re-examine educational policy so that it can lead to multiplication and betterment of the reforms. Educational reforms actually focus on accountability. A positive educational development and reform is very challenging and needs more effort and strategy on how to use and utilize the resources effectively as such it can achie...
发表评论
阅读全文