Search for: [Affiliation = "Flaga, Łukasz \: Cracow University of Technology, Faculty of Civil Engineering, Wind Engineering Laboratory, Jana Pawła II 37\/3a, 31\-864 Cracow"]

Search results

Number of results: 2

items per page: 25 50 75

Sort by:

of 1

Practical problems of dynamic similarity criteria in fluid–solid interaction at different fluid–solid relative motions

Andrzej Flaga Renata Kłaput Łukasz Flaga

Archives of Civil Engineering | 2024 | vol. 70 | No 1 | 95-118 | DOI: 10.24425/ace.2024.148902

Keywords dynamic similarity criteria fluid–solid interaction fluid–solid relative motions

Download PDF Download RIS Download Bibtex

Abstract

The work concerns dynamic similarity criteria of various phenomena occurring in hydraulics and fluid dynamics originally derived from ratios of forces and forces moments affecting these phenomena. The base of dynamic similarity criteria formulations and considerations is A. Flaga’s method and procedure for determining dynamic similarity criteria in different issues of fluid–solid interactions i.e. at different fluid–solid relative motions. The paper concerns the determination and analysis of dynamic similarity criteria for various practical problems encountered mainly in hydraulics and fluid dynamics at steady, smooth fluid onflow in front of a solid. Moreover, the cases of mechanically induced vibrations of a body in a stationary fluid moving with constant velocity in front of the body have been presented. Assuming authorial method and procedure for determining dynamic similarity criteria, its have been presented and analysed in the paper both well known similarity numbers obtained in another way (e.g. from dimensional analysis or differential equations for particular problems – as Reynolds, Froude, Euler, Cauchy, Strouhal, Mach numbers) – as well as several new similarity numbers encountered in different fluid solid interaction problems (e.g. new forces and moments coefficients encountered in problems of vibrating solid bodies in fluids).

Go to article

Authors and Affiliations

Andrzej Flaga

e-mail:

ORCID:

Renata Kłaput

e-mail:

ORCID:

Łukasz Flaga

e-mail:

ORCID:

Cracow University of Technology, Faculty of Civil Engineering, Wind Engineering Laboratory, Jana Pawła II 37/3a, 31-864 Cracow, Poland

Wind tunnel model tests of wind action on the chimney with grid-type curtain structure

Andrzej Flaga Renata Kłaput Łukasz Flaga Piotr Krajewski

Archives of Civil Engineering | 2021 | vol. 67 | No 3 | 177-196 | DOI: 10.24425/ace.2021.138050

Keywords model test chimney with grid-type curtain wind action wind pressure determination

Download PDF Download RIS Download Bibtex

Abstract

The subject of the wind tunnel tests is a steel chimney 85 m high of cylindrical – type structure with a grid-type curtain structure situated at its upper part. The model of the upper part of the chimney made in the scale of 1:19 was equipped with 3 levels of wind pressure measurement points. Each level contained 24 points connected with pressure scanners. On the base of the pressure measurements, both mean and instantaneous aerodynamic drag and side force coefficients were determined. Next wind gust factors for these two wind action components were determined. Moreover, for each pressure signal Fast Fourier Transform was done. Mean wind action components were also determined using stain gauge aerodynamic balance. Obtained results make possible to conclude that the solution applied in the upper part of the designed chimney is correct from building aerodynamics point of view. Some minor vortex excitations were observed during model tests of the upper part of the chimney. The basic dynamic excitation of this part of the chimney is atmospheric turbulence.

Go to article

Bibliography

[1] Zdravkovich M.M., “Review and classification oof various aerodynamic and hydrodynamic means for suppressing vortex shedding”. J.Wind Eng. Ind. Aerodyn., 7(2): pp. 145-189, 1981.
[2] Arunachalam, S., & Lakshmanan, N. (2015). “Across-wind response of tall circular chimneys to vortex shedding”. Journal of Wind Engineering and Industrial Aerodynamics, 145, pp. 187–195, https://doi.org/10.1016/j.jweia.2015.06.005.
[3] Wang, L., & Fan, X. (2019). “Failure cases of high chimneys: A review”. Engineering Failure Analysis, 105, pp. 1107–1117, https://doi.org/10.1016/j.engfailanal.2019.07.032.
[4] Vickery, B. J., & Basu, R. I., “The response of reinforced concrete chimneys to vortex shedding”. Engineering Structures, 6(4), pp. 324–333, 1974
[5] Flaga A., “Wind vortex-induced excitation and vibration of slender structures-single structure of circular cross-section normal to flow”. Monograph No. 202. Cracow University of Technology, Cracow 1996.
[6] Lipecki, T., & Flaga, A. (2013). “Vortex excitation model. Part I. mathematical description and numerical implementation”. Wind and Structures, 16(5), pp. 457–476.
[7] Lipecki, T., & Flaga, A. (2013). “Vortex excitation model. Part II. application to real structures and validation”. Wind and Structures, 16(5), pp. 477–490, https://doi.org/10.12989/was.2013.16.5.477.
[8] Brownjohn, J. M. W., Carden, E. P., Goddard, C. R., & Oudin, G. (2010). “Real-time performance monitoring of tuned mass damper system for a 183 m reinforced concrete chimney”. Journal of Wind Engineering and Industrial Aerodynamics, 98(3), pp. 169–179, https://doi.org/10.1016/j.jweia.2009.10.013.
[9] Christensen, R. M., Nielsen, M. G., & Støttrup-Andersen, U. (2017). “Effective vibration dampers for masts, towers and chimneys”. Steel Construction, 10(3), pp. 234–240, https://doi.org/10.1002/stco.201710032.
[10] Belver, A. V., Ibán, A. L., & Lavín Martín, C. E. (2012). “Coupling between structural and fluid dynamic problems applied to vortex shedding in a 90m steel chimney”. Journal of Wind Engineering and Industrial Aerodynamics, 100(1), pp. 30–37. .
[11] Verboom, G. K., & van Koten, H. (2010). “Vortex excitation: Three design rules tested on 13 industrial chimneys”. Journal of Wind Engineering and Industrial Aerodynamics, 98(3), pp. 145–154, https://doi.org/10.1016/j.jweia.2009.10.008.
[12] Kawecki, J., & Żurański, J. A. (2007). ”Cross-wind vibrations of steel chimneys – A new case history”. Journal of Wind Engineering and Industrial Aerodynamics, 95(9–11), pp. 1166–1175.
[13] Lupi, F., Höffer, R., & Niemann, H.-J. (2021). “Aerodynamic damping in vortex resonance from aeroelastic wind tunnel tests on a stack”. Journal of Wind Engineering and Industrial Aerodynamics, 208, pp. 104–438.
[14] Lupi, F., Niemann, H.-J., & Höffer, R. (2017). “A novel spectral method for cross-wind vibrations: Application to 27 full-scale chimneys”. Journal of Wind Engineering and Industrial Aerodynamics, 171, pp. 353–365, https://doi.org/10.1016/j.jweia.2017.10.014.
[15] Rahman, S., Jain, A. K., Bharti, S. D., & Datta, T. K. (2020). “Comparison of international wind codes for across wind response of concrete chimneys”. Journal of Wind Engineering and Industrial Aerodynamics, 207, pp. 104–401.
[16] Ruscheweyh H., “Dynamische Windwirkung an Bauwerken. Band 2: Praktische Anwendungen. Bauverlag”. Wiesbaden und Berlin, 1982.
[17] Blevins R.D., “Flow-induced vibration. Second edition”. Van Nostrand Reinhold, New York 1990.
[18] Flaga A., “Wind engineering – fundamentals and applications” (in Polish), Arkady, Warsaw (2008).

Go to article

Authors and Affiliations

Andrzej Flaga

e-mail:

ORCID:

Renata Kłaput

e-mail:

ORCID:

Łukasz Flaga

e-mail:

ORCID:

Piotr Krajewski

e-mail:

ORCID:

Cracow University of Technology, Faculty of Civil Engineering, Wind Engineering Laboratory, Jana Pawła II 37/3a, 31-864 Cracow

Search results

Filters

Search results

Practical problems of dynamic similarity criteria in fluid–solid interaction at different fluid–solid relative motions

Abstract

Authors and Affiliations

Wind tunnel model tests of wind action on the chimney with grid-type curtain structure

Abstract

Bibliography

Authors and Affiliations