Journals / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi / 2009 / Cilt: 24 - Sayı: 2

Theoretical and experimental study of transient flows due to pump shut - off

Pompa durmasıyla oluşan kararsız akımların deneysel ve teorik olarak araştırılması

Pages
359–368
Publication Date
2022-10-18
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Since the discrepancy between theoretical and experimental results is negligible, one can deduce that the used method and approaches are convenient.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The aim of this study is to search the unsteady flows due to shut-off of the pump.
📊
Key Findings & Data:Pressures have been measured at the immediate outlet of the pump.
💡
Conclusion & Impact:Since the discrepancy between theoretical and experimental results is negligible, one can deduce that the used method and approaches are convenient.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The aim of this study is to search the unsteady flows due to shut-off of the pump. Pressures have been measured at the immediate outlet of the pump. Valve and elbow head losses were determined for different steady state discharges. Thus, the numerical values and empirical expressions for loss coefficients versus velocities were derived. Numerical results were obtained by computer program written in Fortran language using the method of characteristics. In numerical solution, the pump behavior which constitutes the upstream boundary condition is expressed by means of head balance and speed change equations written in terms of dimensionless parameters. An acceptable agreement is observed between theoretical and experimental results. Since the discrepancy between theoretical and experimental results is negligible, one can deduce that the used method and approaches are convenient.

Özet

Bu çalışmada pompanın duraklaması ile oluşan kararsız akımları teorik ve deneysel olarak araştırılmıştır Basınçlar pompa çıkışında ölçülmüştür. Vana ve dirsek kayıpları değişik debiler için ölçülerek yerel kayıp katsayılarının değerleri doğrudan elde edilmiş ve bu katsayılar için hıza bağlı olarak değişen ampirik bağıntılar türetilmiştir. Teorik sonuçlar, Karakteristikler Yöntemi kullanılarak ve Fortran dilinde yazılmış bilgisayar programı ile elde edilmiştir. Sayısal çözümde memba sınır şartını oluşturan pompanın davranışı boyutsuz parametreler kullanılarak yazılmış yük denge ve hız değişimi denklemleriyle ifade edilmiştir. Deneysel sonuçların teorik sonuçlarla uyumlu olduğu görülmüş olup gözlenen farklılıkların ihmal edilebilir mertebede olması kullanılan yöntem ve yaklaşımların uygun olduğunu göstermektedir.

🔖

Cite This Article

GÜNEY, M. Ş., KAYIKÇI, N. S. (2022). Theoretical and experimental study of transient flows due to pump shut - off. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Cilt: 24 - Sayı: 2, 359–368. https://ajindex.com/articles/523868

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (19)

  1. Chaudhry, M. H., Applied Hydraulic Transients, Van Nostrand Reinhold Company, USA, 1987
  2. Watters, G.Z., Modern Analysis and Control Of Unsteady Flow in Pipelines, Michigan, Ann Arbor Science, USA, 1979
  3. Koç, A.C., Computation of unsteady flows in hydraulic systems with hydraulic machinery, A Thesis submitted to the graduate school of the natural and applied sciences of Dokuz Eylül University, İzmir, 2001
  4. Donsky, B., "Complete Pump Characteristic and The Effects of Specific Speeds on Hydraulic Transients", Journal of Basic Engineering, ASME, 685-699, 1961
  5. Burmann, W., "Water Hammer in Coaxial Pipe Systems", Journal of Hydraulic Division of ASCE, 101, 6, 699-715, 1975
  6. Streeter, V.L., ve Wylie, E.B., "Transient Analysis of Offshore Loading Systems", Journal of Manufacturing Science and Engineering, 97, (1), 259-265, 1975
  7. Wylie, E. B., ve Streeter, V. L., Fluid Transients, Prentice Hall, USA, 1978
  8. Tullis, J.P., Hydraulics of Pipelines, J. Wiley & Sons Inc., USA,1989
  9. Thorley, A. R. D., "Check Valve Behaviour Under Transient Flow Conditions: A State-of-the- Art Review", Journal of Fluids Engineering, (111), 178-183, 1989
  10. Thorley, A.R.D., Fluid Transients in Pipeline Systems, D&L George Ltd., England, 1991
  11. Wylie,E.B. ve Streeter,V.L., Fluid Transients in Systems, Prentice Hall, USA, 1993 12. Larock, B.E., Jeppson, R.W. ve Watters, G.Z., Hydraulics of Pipeline Systems, CRC Press, USA, 2000
  12. Popescu, M., Arsenie, D. ve Vlase, P.,Applied Hydraulic Transients, A.A. Balkema Publishers, 2003
  13. Rahmeyer, W., "Dynamic Flow Testing of Check Valves", Journal of Nuclear Industry Check Valve Group, Winter meeting, St. Petersburg, Florida, USA, 1996
  14. Kirkland, C., "Controlling and Understanding the Effects of Air in Pipelines", Conference paper, Amiad Australia Pty. Ltd, 1998
  15. Kono, Y., Watanabe, M. ve Ito, T., "Phase Change Analysis in Water Hammer by Upstream Finite Difference Method", Conference Paper, Japan, 1998
  16. Kameswara, R. C. V. ve Eswaran, K., "Pressure Transients in Incompressible Fluid Pipeline Networks", Journal of Nuclear Engineering and Design, 188, 1, 1-11, 1999
  17. Alves, E. G., "Hydraulic Analysis of Sudden Flow Changes in a Complex Piping Circuit", Conference paper, Delaware, USA, 2004
  18. Ward, D., "Automatic and Remotely Controlled Shutoff for Direct Flow Liquid Manure application Systems", 2004
  19. Clark, G. A., Smajstrla, A.G. ve Haman, D.Z., "Water Hammer in Irrigation Systems", Institute