An experimental investigation on the dynamics of liquid sloshing in a rectangular tank and its interaction with an internal vertical pole

Sanapala, V.S.; Sajish, S.D.; Velusamy, K.; Ravisankar, A.; Patnaik, B.S.V.

doi:10.1016/j.jsv.2019.02.025

Cited by 28 publications

(5 citation statements)

References 32 publications

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“…Studies about liquid sloshing have been done mainly by doing theoretical analyses [20,21], experimental analyses [22,23], and computer simulation analyses [24,25], etc. Moreover, much research has focused on reducing sloshing in large liquid-gas tanker vehicles, oil tanker vehicles, and spacecraft [26,27].…”

Section: Background and Related Workmentioning

confidence: 99%

Stability Analysis of a Sprayer UAV with a Liquid Tank with Different Outer Shapes and Inner Structures

et al. 2022

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The performance of sprayer UAVs largely depends on accurate trajectory control while spraying. A large amount of a liquid payload may create a sloshing effect inside the liquid tank, which may occur largely during hazardous phenomena, such as wind gusts and obstacle avoidance. This all-way sloshing force inside the tank may disturb the UAV’s trajectory by, for example, a displacement from the planned path or collision with an obstacle. A large number of existing sprayer UAVs already carry various-shaped tanks. A UAV’s liquid-sloshing problem must be reduced for existing and future plant protection. Applying suitable methods can achieve these goals and provide better performance. Moreover, various tank models have different structures and capabilities, which must be fixed using a flexible solution. This article proposes a simple baffle solution for all forms of pesticide tanks and compares baffle systems’ impacts using primary shaped tanks. Indoor lab experiments showed the extreme impacts inside the tanks. Outdoor UAV mission experiments provided the practical effectiveness of the tank structures, and primary shaped tank comparison results provided guidance for future UAV pesticide-tank manufacturing. A new baffle ball design is presented for a universal solution. A one-axis linear slider was used for optical observations, an open-source flight controller was used for on-field compliance, and plenty of tests were done to prove the concept and show the efficiency. The flat hexagonal tank and baffle ball system showed better results in both indoor and outdoor experiments.

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Section: Background and Related Workmentioning

confidence: 99%

Stability Analysis of a Sprayer UAV with a Liquid Tank with Different Outer Shapes and Inner Structures

et al. 2022

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“…A successful method to reduce the run-up as well as pressure peaks at the walls is the addition of additional structures inside the tank. This can be fixed inner structures [33][34][35][36][37] as well as potentially flexible elements [38]. Such a reduction of the impact of the sloshing is a next step planned for the floating cylinder.…”

Section: Introductionmentioning

confidence: 99%

Roll Motion of a Water Filled Floating Cylinder—Additional Experimental Verification

Gabl

Davey

Ingram

2020

Water

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Understanding the behaviour of water filled bodies is important from an applied engineering perspective when understanding the sea-keeping performance of certain floating platforms and vessels. Even by assuming that the deformation is negligible small in relation to the motion of the structure, these fluid-structure-fluid interactions are challenging to model, both physically and numerically, and there is a notable lack of reference data sets and studies to support the validation of this work. Most of the existing information is highly specific to certain hulls forms, or is limited to small motions. A previous study addressed this by modelling a floating cylinder (giving a more generic case) with roll and pitch motions in excess of 20°. The presented experiment expands on that work to further investigate the previously observed switch between pitch and roll in the cylinder under wave action as induced by the sloshing of the internal water volume. An additional experimental investigation, focused on a single draft, was conducted to test open research questions from the previous study. Here we show that the roll response of the water filled cylinder is repeatable, independent of the tank position and wave amplitude, provided the observation time is long enough to capture the fully developed motion response of the floating object. The mooring system used comprised four soft lines connected on two points on the cylinder. This arrangement resulted in slightly different restoring forces in different wave directions. A relative change of the wave direction by 90° led to a larger wave frequency band in which the roll motion occurred. These cases were, again, also conducted with the solid ballast. Both sets of data provide an interesting validation case for future work on water ballast inside a floating object.

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“…The displacement of free oil liquid surface, pressure distribution, the force, and moment of liquid sloshing were obtained under the action of harmonic excitation by CFD. [14][15][16] The study of ring baffle about suppressing liquid sloshing was carried out by Liu and Lin. The optimal structure of baffle is determined by virtual boundary force (VBF) method and test.…”

Section: Introductionmentioning

confidence: 99%

Influencing analysis of different baffle factors on oil liquid sloshing in automobile fuel tank

Zhang

Zhu

Wang

2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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Oil liquid sloshing is a common phenomenon in automobile fuel tank under variable working conditions. Installing baffles in automobile fuel tank is the most effective way to suppress adverse influence caused by oil liquid sloshing. Different types of three-dimensional finite element models filling oil liquid are created, meshed, and simulated. The reliability of simulation results is verified by test. The concept of time–area value is proposed in this work. In order to explore the influence of different baffle factors on oil liquid sloshing, six factors are studied. Six kinds of influencing factors are height, structure, shape, spacing, number, and placement of baffles. The sloshing pressure and time–area value are the core parameters for evaluating the influence degree. Some results could be obtained by comparing the parameters of oil liquid sloshing under the same condition. High baffles and baffles with small spacing have obvious attenuation influence on the pressure of oil liquid sloshing. Low baffles, double baffles, parallel baffles, and the combined action of inertia force and gravity are more beneficial to the reduction of time–area value. Time–area value is the largest and the smallest in fuel tank with intersection baffles and low baffles, respectively.

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An experimental investigation on the dynamics of liquid sloshing in a rectangular tank and its interaction with an internal vertical pole

Cited by 28 publications

References 32 publications

Stability Analysis of a Sprayer UAV with a Liquid Tank with Different Outer Shapes and Inner Structures

Stability Analysis of a Sprayer UAV with a Liquid Tank with Different Outer Shapes and Inner Structures

Roll Motion of a Water Filled Floating Cylinder—Additional Experimental Verification

Influencing analysis of different baffle factors on oil liquid sloshing in automobile fuel tank

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