THE VELOCITY AND PRESSURE FLUCTUATIONS INSIDE HEMISPHERICAL DIMPLE

Authors

  • В. Воскобійник Institute of Hydromechanics of NAS Ukraine
  • А. Воскобійник Institute of Hydromechanics of NAS Ukraine

DOI:

https://doi.org/10.18372/2310-5461.11.5219

Keywords:

vortex flow, velocity and pressure fluctuations, coherent structure, hemispherical dimple

Abstract

The results of experimental researches of formation and evolution of vortex flow are presented into a hemispher-ical dimple, located on a flat surface. It is measured cross spectra of velocity fluctuation field over streamlined surface of the dimple and the plate and wall-pressure fluctuation field on streamlined surfaces. It enabled to de-fine  frequencies  of  rotation  and break  up  of  coherent  vortex  structures,  frequencies  of shear layer  self-oscillations,  low-frequency  resonance  of  self- oscillations  and  transversal  oscillations  of  vortex  flow  inside the cavity.

References

Гортышов Ю. Ф. Теплогидравлическая эффективность перспективных способов интенсификации теплоотдачи в каналах теплообменного оборудования / Ю. Ф. Гортышов, И. А. Попов, В. В. Олимпиев [и др.]. — Казань : Центр инновационных технологий, 2009. — 531 с.

Кикнадзе Г. И. Явление самоорганизации смерчеобразных струй в потоках сплошной среды и технологий на его основе / Г. И. Кикнадзе // Труды XVI Школы-семинара молодых ученых и специалистов под руководством академика РАН А. И. Леонтьева. — Санкт-Петербург. — В 2 т. Т. 2. — М. : Изд-ий дом МЭИ, 2007. — С. 341–345.

Isaev S. A. Influence of the Reynolds number and the spherical dimple depth on turbulent heat transfer and hydraulic loss in a narrow channel / S. A. Isaev, N. V. Kornev, A. I. Leontiev, E. Hassel // Int. J. Heat Mass Transfer. — 2010. — 53. — Р. 178–197.

Kovalenko G. V. Flow regimes in a single dimple on the channel surface / G. V. Kovalenko, V. I. Terekhov, A. A. Khalatov // J. Appl. Mech. Techn. Physics. — 2010. — 51. — № 6. — P. 839–848.

Charwat A. F. An investigation of separated flows — Part II Flow in the cavity and heat transfer / A. F. Charwat, J. N. Roos, C. F. Dewey, J. A. Hiltz // J. Aerospace Sci. — 1961. — 28. — № 6, — Р. 457–470.

Турик В. Н. Частотно-волновые характеристики когерентных вихревых структур в трехмерной лунке / В. Н. Турик, В. В. Бабенко, В. А. Воскобойник, А. В. Воскобойник // Промислова гідравліка і пневматика. — 2009. — 23. — № 1. — С. 21–28.

Voropaev G. A. Vortical flow features in a hemispherical cavity on a flat plate / G. A. Voropaev, V. A. Voskoboinick, N. V. Rozumnyuk, A. V. Voskoboinick // Sixth International Symposium on Turbulence and Shear Flow Phenomena, TSFP-6, 22–24 June 2009. — Seoul, Korea, 2009. — Vol. 2. — P. 563–568.

Терехов В. И. Экспериментальное исследование развития течения в канале с полусферической каверной / В. И. Терехов, С. В. Калинина, Ю. М. Мшвидобадзе // Сиб. физ.-тех. журнал. — 1992. — № 1. — С. 77–85.

Metzger M. M. A comparative study of near-wall turbulence in high and low Reynolds number boundary layers / M. M. Metzger, J. C. Klewicki // Phys. Fluids. — 2001. — 13.— № 3. — P. 692–701.

Bres G. A. Three-dimensional instabilities in compressible flow over open cavities / G. A. Bres, T. Colonius // J. Fluid Mech. — 2008. — 599. — P. 309–339.

Downloads

Published

2011-06-23

How to Cite

Воскобійник, В., & Воскобійник, А. (2011). THE VELOCITY AND PRESSURE FLUCTUATIONS INSIDE HEMISPHERICAL DIMPLE. Science-Based Technologies, 11(3-4), 15–20. https://doi.org/10.18372/2310-5461.11.5219

Issue

Vol. 11 No. 3-4 (2011)

Section

Avionics and Engineering

License

The scientific journal adheres to the principles of Open Access and provides free, immediate, and permanent access to all published materials without financial, technical, or legal barriers for readers.

All articles are published in Open Access under the Creative Commons Attribution 4.0 International (CC BY 4.0) license.

Copyright

Authors who publish their works in the journal:

  • retain the copyright to their publications;

  • grant the journal the right of first publication of the article;

  • agree to the distribution of their materials under the CC BY 4.0 license;

  • have the right to reuse, archive, and distribute their works (including in institutional and subject repositories), provided that proper reference is made to the original publication in the journal.