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Article

Experimental Study on Motion Behavior and Longitudinal Stability Assessment of a Trimaran Planing Hull Model in Calm Water

College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
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Authors to whom correspondence should be addressed.
Academic Editor: Md Jahir Rizvi
J. Mar. Sci. Eng. 2021, 9(2), 164; https://doi.org/10.3390/jmse9020164
Received: 4 January 2021 / Revised: 1 February 2021 / Accepted: 2 February 2021 / Published: 6 February 2021
(This article belongs to the Section Ocean Engineering)
In this study, a high-speed planing trimaran hull form is designed, and the effects of different displacements and gravity longitudinal layouts on the performance of the trimaran planing hull in calm water are experimentally investigated in the towing tank of the China Special Vehicle Research Institute. Based on previous work, an innovative inner tunnel appendage hydroflap is mounted in the inner aft tunnel, located 1/8 L from the transom in the longitudinal direction with attack angles of 0° and 4°, respectively. Furthermore, a regular stern flap is mounted on the transom close to the chine. The towing test results show that, as the gravity center moves forward, the high-speed region resistance of the planing trimaran increases and the longitudinal stability is also strengthened. Further, the total resistance of the planing trimaran with a heavier displacement is larger while the average mass resistance declines; i.e., the resistance efficiency is improved. The results also indicate that the inner tunnel hydroflap and stern flap enhance the aft hull hydrodynamic lift and tunnel aerodynamic lift. As a result, mounting aft hull lift enhancement appendages can affect the bottom and inner tunnel pressure distribution and then cause a slight resistance decrease in the low-speed region. The value relationship of resistance between groups of appendages for the attached hull and bare hull is reversed at a speed of about Froude number 3.0. Although the aft hull lift enhancement appendages result in a higher resistance cost in the high-speed region, the longitudinal stability is effectively promoted and the occurrence speed of porpoising results in a delay of 1 to 2 m/s. View Full-Text
Keywords: towing test; motion behavior; longitudinal stability; planing trimaran; stern flap; hydroflap towing test; motion behavior; longitudinal stability; planing trimaran; stern flap; hydroflap
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MDPI and ACS Style

Zou, J.; Lu, S.; Sun, H.; Zan, L.; Cang, J. Experimental Study on Motion Behavior and Longitudinal Stability Assessment of a Trimaran Planing Hull Model in Calm Water. J. Mar. Sci. Eng. 2021, 9, 164. https://doi.org/10.3390/jmse9020164

AMA Style

Zou J, Lu S, Sun H, Zan L, Cang J. Experimental Study on Motion Behavior and Longitudinal Stability Assessment of a Trimaran Planing Hull Model in Calm Water. Journal of Marine Science and Engineering. 2021; 9(2):164. https://doi.org/10.3390/jmse9020164

Chicago/Turabian Style

Zou, Jin, Shijie Lu, Hanbing Sun, Liru Zan, and Jiuyang Cang. 2021. "Experimental Study on Motion Behavior and Longitudinal Stability Assessment of a Trimaran Planing Hull Model in Calm Water" Journal of Marine Science and Engineering 9, no. 2: 164. https://doi.org/10.3390/jmse9020164

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