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In the present work, an approach to obtain a design method for the size of the plenum chamber cross-section of a marine gas turbine air supply system has been investigated. Flow in ducts makes noise which is very high in the turbine inlet part because of the large amount of flow. Therefore, this phenomenon should be considered in the design process. A suitable approach to design the duct is proposed (considering acoustic and aerodynamic performance at the same time). In this method, an air supply channel system of the marine gas turbine has been categorized into three sections according to the requirements of the aerodynamic and acoustic; inlet, plenum chamber, and outlet channels with circular cross-sections. The geometrical dimensions of inlet and outlet channels have been determined using the plane waves theory about a channel, in which the effects of flow is ignored. Space limitations of battleships at the dominant frequency have been considered. Then, the optimized size of the mid-channel section, in terms of both aerodynamic and acoustic requirements, using numerical methods and regarding the effects of flow has been calculated. Various 3D turbulent flows inside the plenum chamber have been considered, in which large eddy simulation turbulence model is utilized. Ffowcs, Williams and Hawkings models are used for the sound propagation process based on the Lighthill integral equation. The validity of the simulation has been checked by comparing results (sound pressure level) with experimental data obtained from a chamber. The comparison revealed the acceptable errors for a variety of frequencies. The results disclosed that the performance of channel system aerodynamic decreased when the fraction of plenum chamber cross-section to inlet/outlet channel cross-section increased. With an increase in the cross-section size at first Acoustic performance is improved and then worsen. Six different cases of marine gas turbine air supply system configurations have been presented, in which the limitation of the battleship space is considered. Examining and comparing the acoustic performance of different cases of the air supply channel system, it was found that the amount of sound pressure level, around the air supply channel system, and the high-pressure sound area can move along the air supply channel system. Additionally, deviations from plane waves considering the effects of flow have been inspected in all cases. The reason for this deviation is the effects of the airflow through the channel system and quadrupole sources in the production of sound in the channel system, which causes higher modes.
Wydawca
Czasopismo
Rocznik
Tom
Strony
793--806
Opis fizyczny
Bibliogr. 36 poz., rys., wykr.
Twórcy
autor
- Department of Mechanical and Aerospace Engineering, Malek-Ashtar University of Technology, P.O. Box 83145/115, Shahin-Shahr, Isfahan, Iran
autor
- Department of Mechanical and Aerospace Engineering, Malek-Ashtar University of Technology, P.O. Box 83145/115, Shahin-Shahr, Isfahan, Iran
Bibliografia
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- 2. Bies D. A., Hansen C., Howard C. (2017), Engineering noise control, CRC Press.
- 3. Bilawchuk S., Fyfe K. R. (2003), Comparison and implementation of the various numerical methods used for calculating transmission loss in silencer systems, Applied Acoustics, 64, 9, 903-916, doi: 10.1016/S0003-682X(03)00046-X.
- 4. Cao Y., Ke H., Lin Y., Zeng M., Wang Q. (2017), Investigation on the flow noise propagation mechanizm in simple expansion pipelines based on synergy principle of flow and sound fields, Energy Procedia, 142, 3870-3875, doi: 10.1016/j.egypro.2017.12.290.
- 5. Carlton J.S. (2012), Marine propellers and propulsion, 3 ed., J. S. Carlton [Ed.], Oxford : Elsevier Science.
- 6. Chiu M.-C., Chang Y.-C. (2014), An assessment of high-order-mode analysis and shape optimization of expansion chamber mufflers, Archives of Acoustics, 39, 4, 489-499, doi: 10.2478/aoa-2014-0053.
- 7. Chu C. I., Hua H. T., Liao I. C. (2001), Effects of three-dimensional modes on acoustic performance of reversal flow mufflers with rectangular crosssection, Computers & Structures, 79, 8, 883-890, doi: 10.1016/S0045-7949(00)00184-X.
- 8. Dawkins S. (2011), A guide to aeroacoustics: an overview, lighthill’s equation, related model equations, Etc: BiblioBazaar.
- 9. Dube R., Parmar A., Thakor R., Vasadia S., Mistri C., Sompura M. (2018), Numerical analysis of flow induced vibrations of tubes banks in cross flow using porous media, International Research Journal of Engineering and Technology, 5, 5, 1496-1501, https://www.irjet.net/archives/V5/i5/IRJET-V5I5283.pdf.
- 10. Guasch O., Pont A., Baiges J., Codina R. (2016), Concurrent finite element simulation of quadrupolar and dipolar flow noise in low Mach number aeroacoustics, Computers & Fluids, 133, 129-139, doi: 10.1016/j.compfluid.2016.04.030.
- 11. Guasch O., Pont A., Baiges J., Codina R. (2017), Simultaneous finite element computation of direct and diffracted flow noise in domains with static and moving walls, Paper presented at the International Conference on Flow Induced Noise and Vibration Issues and Aspects.
- 12. Hillenbrand J., Becker S., Sailer T., Wetzel M., Hausner O. (2016), Numerical simulation of turbulence induced flow noise in automotive exhaust systems using scale-resolving turbulence models, Springer.
- 13. Howe M. S. (2003), Theory of vortex sound, Cambridge University Press.
- 14. Ji Z. L. (2005), Acoustic attenuation performance analysis of multi-chamber reactive silencers, Journal of sound and vibration, 283, 1-2, 459-466, doi: 10.1016/j.jsv.2004.05.013.
- 15. Kårekull O., Efraimsson G., Åbom M. (2014), Prediction model of flow duct constriction noise, Applied Acoustics, 82, 45-52, doi: 10.1016/j.apacoust.2014.03.001.
- 16. Łapka W. (2014), Acoustic attenuation performance of a round silencer with the spiral duct at the inlet, Archives of Acoustics, 32, 4(S), 247-252.
- 17. Lighthill M. J. (1952), On sound generated aerodynamically. I. General theory, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 211, 1107, 564-587, doi: 10.1098/rspa.1952.0060.
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- 21. Mohammed R., Sabry A., Abd El-Gwwad K. A., Abd-El-Tawwab A. M., Nouby M. (2012), Modelling and analysis of single expansion chamber using Response Surface Methodology, Journal of Engineering Research and Applications (IJERA), 2, 1, 651-658, http://www.ijera.com/papers/Vol2_issue1/DA216516-58.pdf.
- 22. Munjal M. L. (1997), Plane wave analysis of side inlet/outlet chamber mufflers with mean flow, Applied Acoustics, 52, 2, 165-175, doi: 10.1016/S0003-682X(96)00053-9.
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- 24. Nag S., Gupta A., Dhar A. (2017), Sound attenuation in expansion chamber muffler using plane wave method and finite element analysis, Nonlinear Studies, 24, 1, 69-78, http://nonlinearstudies.com/index.php/nonlinear/article/view/1464.
- 25. Nakayama Y., Boucher R. F. (1998), Introduction to fluid mechanics, Oxford: Butterworth-Heinemann.
- 26. Norton M. P., Karczub D. G. (2003), Fundamentals of noise and vibration analysis for engineers, Cambridge University Press.
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- 28. Sagaut P. (2001), Large Eddy Simulation for incompressible flows. An introduction, Measurement Science and Technology, 12, 10, 1745, doi: 10.1088/0957-0233/12/10/707.
- 29. Tsuji T., Tsuchiya T., Kagawa Y. (2002), Finite element and boundary element modelling for the acoustic wave transmission in mean flow medium, Journal of Sound and Vibration, 255, 5, 849-866, doi: 10.1006/jsvi.2001.4189.
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- 31. Wang M., Freund J. B., Lele S. K. (2006), Computational prediction of flow-generated sound, Annual Review of Fluid Mechanics, 38, 483-512, doi: 10.1146/annurev.fluid.38.050304.092036.
- 32. Warczek J., Burdzik R., Konieczny Ł., Siwiec G. (2017), Frequency analysis of noise generated by pneumatic wheels, Archives of Acoustics, 42, 3, 459-467, doi: 10.1515/aoa-2017-0048.
- 33. Wilcox D. C. (1998), Turbulence modeling for CFD (3 ed.), DCW Industries.
- 34. Wu C. J., Wang X. J., Tang H. B. (2007), Transmission loss prediction on SIDO and DISO expansion-chamber mufflers with rectangular section by using the collocation approach, International Journal of Mechanical Sciences, 49, 7, 872-877, doi: 10.1016/j.ijmecsci.2006.11.007.
- 35. Wu C. J., Wang X. J., Tang H. B. (2008), Transmission loss prediction on a single-inlet/double-outlet cylindrical expansion-chamber muffler by using the modal meshing approach, Applied Acoustics, 69, 2, 173-178, doi: 10.1016/j.apacoust.2006.06.011.
- 36. Zhang Z., Li J., Mak C. M. (2009), Simulation analysis of acoustic attenuation performance for different shape of an expansion chamber silencer, Paper presented at the 2009 Second International Conference on Information and Computing Science.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-446af0d8-c84c-43c4-8826-10ece78bf5d2