Wake flow field of a wall-mounted pipe with spoiler on a rough channel bed

• Autorzy: Devi Kalpana , Mishra Shivam , Hanmaiahgari Prashanth Reddy , Pu Jaan H.

Identyfikatory

DOI

10.1007/s11600-022-01008-x

• Języki publikacji: EN

Abstrakty

EN

This research work focuses on the wake flow region of a cylinder with a spoiler on a rough bed under steady flow conditions. The acoustic Doppler velocimetry was used for the measurement of three-dimensional velocity data for two Reynolds numbers in a fully developed turbulent flow around the cylinder with a spoiler. The mean flow velocities, second-order turbulence structures, and conditional statistics were investigated in the wake region of the spoilered cylinder. The flow was separated from the spoiler with the formation of two shear layers between free surface flow and recirculating flow. It is observed that the flow is reattaching to the bed at 11D irrespective of the Reynolds number. Downstream of the cylinder, the mean velocity distributions are asymmetric due to the wall-wake effect, and the point of inflection is observed for each velocity profile at z = 0.40ẟ. The turbulence intensities, Reynolds stresses, and TKE are highly enhanced in the wake region of the cylinder as compared to their respective upstream values for both runs. The turbulence intensities, Reynolds normal stresses, Reynolds shear stresses, and turbulent kinetic energy are attaining peaks at z = 0.4ẟ for all the streamwise locations, and the peaks are found to be highest at x = 10D. The quadrant analysis results indicate that the sweeps are dominating bursting events in the inner and intermediate layers, while ejections are dominating in the outer layer of the wake region. As the hole size, H increases ejections stress fraction rises as compared to that of the sweeps in the wake region for z = 0.2-0.7 h.

Słowa kluczowe

EN

ADV; bed-mounted horizontal cylinder; spoiler; turbulence; wake region; quadrant analysis

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2023
• Tom: Vol. 71, no. 6
• Strony: 2865--2881
• Opis fizyczny: Bibliogr. 40 poz., rys., tab.

Twórcy

autor

Devi Kalpana

• Department of Civil Engineering, IIT Kharagpur, Kharagpur, 721302, India

autor

Mishra Shivam

• Department of Civil Engineering, IIT Kharagpur, Kharagpur, 721302, India

autor

Hanmaiahgari Prashanth Reddy

• Department of Civil Engineering, IIT Kharagpur, Kharagpur, 721302, India

autor

Pu Jaan H.

• Faculty of Engineering and Informatics, School of Engineering, University of Bradford, Bradford, BD71DP, UK

• https://orcid.org/0000-0002-3944-8801

Bibliografia

• 1. Abbasi S, Masoomi M, Arjmandi SA (2018) Impact of a single spoiler on scouring depth status beneath a river crossing inclined pipeline. Eng Technol Appl Sci Res 8:3316–3320
• 2. Afzalimehr H, Moghbel R, Gallichand J, Sui J (2011) Investigation of turbulence characteristics in channel with dense vegetation. Int J Sediment Res 26:269–282. https://doi.org/10.1016/S1001-6279(11)60093-0
• 3. Ampadu-Mintah AA, Tachie MF (2015) Surface roughness effects on separated and reattached turbulent flow in open channel. J Hydraul Res 53:302–316. https://doi.org/10.1080/00221686.2015.1026952
• 4. Cheng L, Chew LW (2003) Modelling of flow around a near-bed pipeline with a spoiler. Ocean Eng 30:1595–1611. https://doi.org/10.1016/S0029-8018(02)00148-8
• 5. Chiew YM (1993) Effect of spoiler on wave-induced scour at submarine pipelines. J Waterw Port, Coastal, Ocean Eng 119:417–428
• 6. Devi K, Hanmaiahgari PR, Balachandar R, Pu JH (2021a) Self-Preservation of turbulence statistics in the wall-wake flow of a bed-mounted horizontal pipe. Fluids 6:453. https://doi.org/10.3390/fluids612045
• 7. Devi K, Hanmaiahgari PR, Balachandar R, Pu JH (2021b) A comparative study between sand- and gravel-bed open channel flows in the wake region of a bed-mounted horizontal cylinder. Fluids 6:239. https://doi.org/10.3390/fluids607023
• 8. Devi K, Hanmaiahgari PR, Balachandar R, Vanteru MR (2022) Reynolds number and submergence ratio effects on turbulence structures in the shallow wake of a horizontal pipe located on a rough bed. Phys Fluids 34:095122. https://doi.org/10.1063/5.0107918
• 9. Dey S, Lodh R, Sarkar S (2018) Turbulence characteristics in wall-wake flows downstream of wall-mounted and near-wall horizontal cylinders. Environ Fluid Mech 18:891–921. https://doi.org/10.1007/s10652-018-9573-0
• 10. Ghani AA, Azamathulla HM (2014) Development of GEP-based functional relationship for sediment transport in tropical rivers. Neural Comput Appl 24:271–276. https://doi.org/10.1007/s00521-012-1222-9
• 11. Ghasempour R, Roushangar K, Azamathulla HM, Alizadeh F (2022) Uncertainty analysis of flow resistance modeling in sewer pipes with different bed conditions using KELM method. Res Sq. https://doi.org/10.21203/rs.3.rs-1191432/v1
• 12. Gokce KT, Gunbak AR (1991) Self burial and stimulated self burial of pipelines by waves. In: Proceedings of the First International Offshore and Polar Engineering Conference. The International Society of Offshore and Polar Engineers p 308–314
• 13. Goring DG, Nikora VI (2002) Despiking acoustic doppler velocimeter data. J Hydraul Eng 128:117–126. https://doi.org/10.1061/(asce)0733-9429(2002)128:1(117)
• 14. Hanmaiahgari PR, Roussinova V, Balachandar R (2017) Turbulence characteristics of flow in an open channel with temporally varying mobile bedforms. J Hydrol Hydromech 65(1):35–48. https://doi.org/10.1515/johh-2016-0044
• 15. Hulsbergen CH, Bijker R (1989) Effect of spoilers on submarine pipeline stability. In: Offshore Technology Conference p 337–366
• 16. Hulsbergen CH (1986) Spoilers for stimulated self-burial of submarine pipelines
• 17. Kang MJ, Lee SJ, Hwang JH, Jo HJ (2016) An Experimental study for analysis of the self-burial of pipelines with spoilers in current. J Adv Res Ocean Eng 2:22–27. https://doi.org/10.5574/JAROE.2016.2.1.022
• 18. Khan MA, Sharma N, Pu J et al (2021) Two-dimensional turbulent burst examination and angle ratio utilization to detect scouring/sedimentation around mid-channel bar. Acta Geophys 69:1335–1348. https://doi.org/10.1007/s11600-021-00600-x
• 19. Lee W, Jo H, Kim H et al (2019) Experimental and Numerical investigation of self-burial mechanism of pipeline with spoiler under steady flow conditions. J Mar Sci Eng 7:456
• 20. Lee Woon Chew, Cheng L (2001) Effect of spoilers on flow around submarine pipelines. In: Proceedings of the International Offshore and Polar Engineering Conference p 126–130
• 21. Lu SS, Willmarth WW (1973) Measurements of the structure of the reynolds stress in a turbulent boundary layer. J Fluid Mech 60:481–511. https://doi.org/10.1017/S0022112073000315
• 22. Maity H, Mazumder BS (2014) Experimental investigation of the impacts of coherent flow structures upon turbulence properties in regions of crescentic scour. Earth Surf Process Landforms 39:995–1013. https://doi.org/10.1002/esp.3496
• 23. Mori N, Suzuki T, Kakuno S (2007) Noise of acoustic doppler velocimeter data in bubbly flows. J Eng Mech 133:122–125. https://doi.org/10.1061/(asce)0733-9399(2007)133:1(122)
• 24. Nakagawa H, Nezu I (1977) Prediction of the contributions to the reynolds stress from bursting events in open-channel flows. J Fluid Mech 80:99–128. https://doi.org/10.1017/S0022112077001554
• 25. Nepf H, Ghisalberti M (2008) Flow and transport in channels with submerged vegetation. Acta Geophys 56:753–777. https://doi.org/10.2478/s11600-008-0017-y
• 26. Nezu I, Nakagawa H (1993) Turbulence in open channel flows. IAHR, Rotterdam
• 27. Oner AA (2009) The flow around a pipeline with a spoiler. J Mech Eng Sci 224:109–121. https://doi.org/10.1243/09544062JMES1699
• 28. Oner AA (2016) Numerical investigation of flow around a pipeline with a spoiler near a rigid bed. Adv Mech Eng 8:1–13. https://doi.org/10.1177/1687814016651794
• 29. Przyborowski Ł, Łoboda AM, Bialik RJ (2019) Effect of two distinct patches of myriophyllum species on downstream turbulence in a natural river. Acta Geophys 67:987–997. https://doi.org/10.1007/s11600-019-00292-4
• 30. Sharma A, Kumar B (2019) Boundary layer development over non-uniform sand rough bed channel. ISH J Hydraul Eng 25:162–169. https://doi.org/10.1080/09715010.2017.1391133
• 31. Sharma A, Kumar B, Oliveto G (2021) Experimental study on the near-bed flow characteristics of alluvial channel with seepage. Appl Sci. https://doi.org/10.3390/app11209619
• 32. Sumer BM, Truelsen C, Sichmann T, Fredsøe J (2001) Onset of scour below pipelines and self-burial. Coast Eng 42:313–335. https://doi.org/10.1016/S0378-3839(00)00066-1
• 33. Taye J, Barman J, Patel M, Kumar B (2019) Turbulent characteristics of sinuous river bend. ISH J Hydraul Eng 27:256–263. https://doi.org/10.1080/09715010.2019.1629843
• 34. Wahl TL (2003) Discussion of Despiking acoustic doppler velocimeter data by Derek G. Goring and Vladimir I. Nikora J Hydraul Eng 128:117–126. https://doi.org/10.1061/(ASCE)0733-9429(2003)129:6(484)
• 35. Wallace JM, Eckelmann H, Brodkey RS (1972) The wall region in turbulent shear flow. J Fluid Mech 54:39–48. https://doi.org/10.1017/S0022112072000515
• 36. Willmarth WW, Lu SS (1972) Structure of the reynolds stress near the wall. J Fluid Mech 55:65–92. https://doi.org/10.1017/S002211207200165X
• 37. Yang L, Shi B, Guo Y (2012a) Study on dynamic angle of repose for submarine pipeline with spoiler on sandy seabed. J Pet Explor Prod Technol 2:229–236. https://doi.org/10.1007/s13202-012-0037-7
• 38. Yang L, Shi B, Guo Y, Wen X (2012b) Calculation and experiment on scour depth for submarine pipeline with a spoiler. Ocean Eng 55:191–198. https://doi.org/10.1016/j.oceaneng.2012.07.031
• 39. Zhao J, Wang X (2009) CFD numerical simulation of the submarine pipeline with a spoiler. J Offshore Mech Arct Eng 131:1–5. https://doi.org/10.1115/1.3124127
• 40. Zhu H, Qi X, Lin P, Yang Y (2013) Numerical simulation of flow around a submarine pipe with a spoiler and current-induced scour beneath the pipe. Appl Ocean Res 41:87–100. https://doi.org/10.1016/j.apor.2013.03.005

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).