Computational Investigation of Pitch Motion of a High-Speed Craft Incorporated with Trim-Tabs
DOI:
https://doi.org/10.37934/cfdl.14.6.5671Keywords:
Computational Fluid Dynamic (CFD), Trim-Tabs, Pitch Motion, Froude Number, Angle of Trim-TabsAbstract
An excessive trim by stern on a high-speed craft is vulnerable to decrease comfortable ride incorporated with the large pitch motion. To prevent such problem, the craft is then equipped with a device known as “trim-tabs” providing a lift force at the stern region, which leads to reduce pitch angle/trim of the craft. This paper presents computational modelling of trim-tabs on high-speed craft towards reducing the pitch motion in the calm water condition. Here, the commercial Computational Fluid Dynamic (CFD) software; called Numeca Fine Marine has been accordingly utilised to evaluate several effects of Froude numbers (Fr) and angle of the trim-tabs into characteristics of the lift force of the high-speed craft. The results revealed that the pitch motion of the high-speed craft equipped with the trim-tabs (5o) has significantly reduced up to 76% at Fr = 1.0. This can be explained that the installed trim-tabs has increased the negative trim moment, which inherently creates the restoring moment pushing the stern up along the pitch-axis. Meanwhile, this may cause involuntary the total ship’s resistance increased. In general, this simulation pointed out the advantage of the trim-tabs to increase the comfortability of the high-speed craft.
Downloads
References
Mansoori, M., and A. C. Fernandes. "Interceptor and trim tab combination to prevent interceptor's unfit effects." Ocean Engineering 134 (2017): 140-156. https://doi.org/10.1016/j.oceaneng.2017.02.024
Avci, Ahmet Gultekin, and Baris Barlas. "An experimental investigation of interceptors for a high speed hull." International Journal of Naval Architecture and Ocean Engineering 11, no. 1 (2019): 256-273. https://doi.org/10.1016/j.ijnaoe.2018.05.001
Ghassemi, H., M. Mansouri, and S. Zaferanlouei. "Interceptor hydrodynamic analysis for handling trim control problems in the high-speed crafts." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 11 (2011): 2597-2618. https://doi.org/10.1177/0954406211406650
Clement, Eugere P., and Donald L. Blount. "Resistance tests of a systematic series of planing hull forms." Trans. SNAME 71, no. 3 (1963): 491-579.
Savitsky, Daniel, and P. Ward Brown. "Procedures for hydrodynamic evaluation of planing hulls in smooth and rough water." Marine Technology and SNAME News 13, no. 04 (1976): 381-400. https://doi.org/10.5957/mt1.1976.13.4.381
Ghadimi, Parviz, Afshin Loni, Hashem Nowruzi, Abbas Dashtimanesh, and Sasan Tavakoli. "Parametric study of the effects of trim tabs on running trim and resistance of planing hulls." Advances in Shipping and Ocean Engineering 3, no. 1 (2014): 1-12.
Ertogan, Melek, Philip A. Wilson, Gokhan Tansel Tayyar, and Seniz Ertugrul. "Optimal trim control of a high-speed craft by trim tabs/interceptors Part I: Pitch and surge coupled dynamic modelling using sea trial data." Ocean Engineering 130 (2017): 300-309. https://doi.org/10.1016/j.oceaneng.2016.12.007
Jokar, H., H. Zeinali, and M. H. Tamaddondar. "Planing craft control using pneumatically driven trim tab." Mathematics and Computers in Simulation 178 (2020): 439-463. https://doi.org/10.1016/j.matcom.2020.05.032
Ikeda, Yoshiho, and T. Katayama. "Stability of high speed craft." Contemporary Ideas on Ship Stability (2000): 401-409. https://doi.org/10.1016/B978-008043652-4/50031-6
Humphree. "Roll/Pitch Stabilization." Humphree. April, 2011. https://humphree.com/functions/humphree-active-stabilization/.
Xi, Handa, and Jing Sun. "Feedback stabilization of high-speed planing vessels by a controllable transom flap." IEEE Journal of Oceanic Engineering 31, no. 2 (2006): 421-431. https://doi.org/10.1109/JOE.2006.875097
Fitriadhy, A., M. A. Faiz, and S. F. Abdullah. "Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport." Journal of Mechanical Engineering and Sciences 11, no. 4 (2017): 3072-3085. https://doi.org/10.15282/jmes.11.4.2017.10.0276
Fitriadhy, A., M. K. Aswad, N. Adlina Aldin, N. Aqilah Mansor, A. A. Bakar, and W. B. Wan Nik. "Computational fluid dynamics analysis on the course stability of a towed ship." Journal of Mechanical Engineering and Sciences 11, no. 3 (2017): 2919. https://doi.org/10.15282/jmes.11.3.2017.12.0263
Fitriadhy, Ahmad, Nur Adlina Aldin, and Nurul Aqilah Mansor. "CFD analysis on course stability of a towed ship incorporated with symmetrical bridle towline." CFD Letters 11, no. 12 (2019): 88-98.
Fitriadhy, A., N. Razali, and N. AqilahMansor. "Seakeeping performance of a rounded hull catamaran in waves using CFD approach." Journal of Mechanical Engineering and Sciences 11, no. 2 (2017): 2601-2614. https://doi.org/10.15282/jmes.11.2.2017.4.0238
Fitriadhy, A., and N. Amira Adam. "Heave and pitch motions performance of a monotricat ship in head-seas." International Journal of Automotive & Mechanical Engineering 14, no. 2 (2017): 4243-4258. https://doi.org/10.15282/ijame.14.2.2017.10.0339
Sherbaz, Salma, and Wenyang Duan. "Ship trim optimization: assessment of influence of trim on resistance of MOERI container ship." The Scientific World Journal 2014 (2014). https://doi.org/10.1155/2014/603695
Downloads
Published
How to Cite
Issue
Section
