Journal is indexed in following databases:
- SCOPUS
- Web of Science Core Collection - Journal Citation Reports
- EBSCOhost
- Directory of Open Access Journals
- TRID Database - Transportation Research Board
- Index Copernicus Journals Master List
- BazTech
- Google Scholar
2023 Journal Impact Factor - 0.7
2023 CiteScore - 1.4
ISSN 2083-6473
ISSN 2083-6481 (electronic version)
Editor-in-Chief
Associate Editor
Prof. Tomasz Neumann
Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
e-mail transnav@umg.edu.pl
An Investigation of Ship Airwakes by Scale Adaptive Simulation
Times cited (SCOPUS): 8
ABSTRACT: An early assessment of the ship airwakes flow characteristic is one of the most challenging tasks associated with the designing of vessels. The presence of ship airwake creates very complex flow phenomena due to the presence of strong velocity gradients in space and time and widely varying high levels of recirculation and turbulence. Under such condition, the landing and take-off operation of a helicopter over the ship helodeck is very complex and accurate prediction represents a computational challenge. We present time-accurate scale-adaptive simulation (SAS) of turbulent flow around a simple frigate ship to gain insight into the flow phenomena over the helodeck. Numerical analysis is carried out after several grids and time-steps refinement to ensure the spatial and temporal accuracy of the numerical data. The instantaneous iso-surface of eddy flow structures and vorticity have been analysed across the vertical and longitudinal plane. Results show good agreement with experimental data. Comparisons of mean quantities and velocity spectra show good agreement, indicating that SAS can resolve the large-scale turbulent structures which can adversely impact ship-helo combined operations. Overall, the SAS approach is shown to capture the unsteady flow features of massively separated ship airwake characteristics with reasonable accuracy.
KEYWORDS: Simulation, Applications for Navy, Ship Airwakes, Scale Adaptive Simulation (SAS), Flow Phenomena, Turbulent Structures, Investigation by Simulation, Ship Airwakes Flow Characteristic
REFERENCES
Healey J.V., The prospects for simulating the helicopter/ship interface. Journal of Naval Engineering 1987; 99:45–63. - doi:10.1111/j.1559-3584.1987.tb02099.x
Zan S. J., On aerodynamic modelling and simulation of the dynamic interface. Proceeding of Institute of Mechanical Engineering Part G - Journal of Aerospace Engineering 2005; 219:393 - 410. - doi:10.1243/095441005X30315
Shukla S., Sinha S. S., and Singh S. N., 2019. Ship-Helo coupled airwake aerodynamics: A Comprehensive Review. Journal of Progress in Aerospace Sciences, 106:71-107. - doi:10.1016/j.paerosci.2019.02.002
Polsky S. A., Bruner C.W.S., River P., Time accurate computational simulations of lha ship airwake. AIAA Journal 2000;41(26):288–297. - doi:10.2514/6.2000-4126
Syms G. F., Simulation of simplified-frigate airwakes using a lattice-Boltzmann method. Journal of Wind Engineering and Industrial Aerodynamics 2008; 96(6):1197–1206. - doi:10.1016/j.jweia.2007.06.040
Forrest J.S., Owen I., An investigation of ship airwakes using Detached-Eddy Simulation. Computers and Fluids 2010;39(4):656–673. - doi:10.1016/j.compfluid.2009.11.002
Shukla S., Singh S.N., Srinivasan B., A computational study of modified TTCP/SFS ship airwakes. In: Royal Institution of Naval Architects - International Conference on Ship and Offshore Technology, ICSOT India 2015: Coastal and Inland Shipping, 2015:1–9.
Zhang, J., Minelli, G., Rao, A., N., Basara, B., Bensow, R., and Krajnovic, S., Comparison of PANS and LES of the flow past a generic ship. Ocean Engineering 2018;(165):221-236. - doi:10.1016/j.oceaneng.2018.07.023
Spalart P. R., Young-Person’s Guide Simulation Grids Detached-Eddy, 2001.
Menter, F. R., and Egorov, Y., The scale-adaptive simulation method for unsteady turbulent flow predictions, part 1: Theory and model description. Flow, Turbulence and Combustion 2010;(85):113-138. - doi:10.1007/s10494-010-9264-5
Whitehouse G.R., Tadghighi H., Investigation of hybrid grid–based computational fluid dynamics methods for rotorcraft flow analysis. Journal of the American Helicopter Society 2010; 56:1–10. - doi:10.4050/JAHS.56.032004
Girimaji S., Abdol-Hamid K., Partially-Averaged navier stokes model for turbulence: implementation and validatio. In: 43rd AIAA Aerospace Sciences Meeting and Exhibit, Nevada, 2005: p.1–14. - doi:10.2514/6.2005-502
Zheng, W., Chao, Y., Hongkang, L., and Dahai, L., Comparative assessment of SAS and DES turbulence modelling for massively separated flows. Acta Mech. Sin. 2016;(32):12–21. - doi:10.1007/s10409-015-0505-7
Egorov, Y., Menter, F. R., Lechner, and Cokljat, R. D., The Scale-Adaptive Simulation Method for Unsteady Turbulent Flow Predictions. Part 2: Application to Complex Flows. Turbulence and Combustion 2010;(85):139–165. - doi:10.1007/s10494-010-9265-4
Menter, F. R., and Egorov, Y., A Scale-Adaptive Simulation Model using Two-Equation Models. 43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005, Reno, Nevada, AIAA 2005-1095. - doi:10.2514/6.2005-1095
Wilkinson C., Zan S. J, Gilbert N., Funk J., 1998. Modelling and simulation of ship air wakes for helicopter operations: a collaborative venture. In: RTO AVT Symposium, pp. 8-1-8–11.
Citation note:
Shukla S., Singh S.N., Sinha S.S., Vijayakumar R.: An Investigation of Ship Airwakes by Scale Adaptive Simulation. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 14, No. 2, doi:10.12716/1001.14.02.27, pp. 471-475, 2020
Other publications of authors:
File downloaded 350 times
