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Keywords: fluctuation
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Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-049
... that the riser transporting spiral flow is significantly affected by non-linear effects. Furthermore, the particles were uniformly distributed inside the riser due to the circumferential effects of the spiral flow, and the occurrence of internal flow density fluctuations was reduced. As a consequence, riser...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-480
... fluctuation algorithm calculation correlation journal simulation calculation Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-589
... measurements carried out in the past were assumed good enough to qualify the membrane for LNG. equation of state thickness inclination fluctuation coefficient membrane tank sensor pulsation reservoir simulation mesh liquid-gas interface interaction corrugated membrane corrugation...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-528
... sustainable development trimaran resistance social responsibility trimaran residual resistance trimaran navigation proportion variation ship resistance equation efficiency modeling & simulation frictional resistance navigation hull fluctuation prediction research trimaran resistance...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-594
... pressure fluctuation is generated by pressure pulses due to changes in the volume of the cavity. This pressure fluctuation is directly delivered to the hull and causes vibration and noise problems, then top off, the hull structural intensity could be damaged (Seol et al, 2019). Also, the cavitation-induced...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-063
... ABSTRACT Deep-sea mining pumps play a vital role in deep-sea mining operations. Typically, these pumps are multi-stage centrifugal pumps designed to deliver adequate hydraulic power. Given the complex and fluctuating concentration and size distribution of ore particles, understanding...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-113
... ABSTRACT Many existing studies show that the ocean tidal turbine experiences frequent and large-scale fluctuations of hydrodynamic loads during its operation, especially when effected by surface waves, which may lead to blade damage due to fatigue. Therefore, the physical wave tank...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-186
... mainly depends on the pipe rotation and the ocean current velocity, can also lead the pipe structural failures by excessive bending stresses and fatigue. Moreover, the hydrodynamic loads from the ocean current exerted on the drill pipe and a downward force: WOB fluctuates due to the dynamic loadings...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-219
... promotes turbulence, marked by chaotic motion with fluctuations in pressure and velocity within the flow. This repeated turbulence and cyclic loading on the bend walls can lead to vibration in the jumper structure when the momentum forces fall within a specific frequency range. Thus, bends are identified...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-262
... From Fig.9(a), compared with the traditional PID, the proposed method has a smaller overshoot compared with the traditional PID. Moreover, the fluctuation of the proposed method is smaller than the PID controller which shows the stability of the proposed method. Besides, the proposed method can make...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-273
... body of revolution and has been widely used as the benchmark model in studies on hydrodynamics about underwater vehicles. The flow information about time-averaged quantities and turbulent fluctuations in turbulent boundary layer and wake region was obtained. Balantrapu et al., (2021, 2023) conducted...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-295
... occupied by fast ice 50% of the time during the single winter season were analyzed and a negative linear trend was revealed The probability polygons of maximal fast ice area edge shows a decrease in the spatial distribution during recent decades. INTRODUCTION The current climate fluctuations...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-271
...Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-78-4; ISSN 1098-6189 www.isope.org Offshore Wind Power Fluctuation...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-290
.... In subsequent experiments starting from the third impact, the stiffened panel exhibits minimal deformation, with measurement results showing a maximum deformation of 2mm. This is primarily due to the minor fluctuations in the results caused by the manual measurement of deformations. In the fourth impact...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-315
... velocity distribution and Reynolds stresses, we specifically focused on the predictive accuracy of the two methods for wall pressure fluctuation. The two-dimensional (consisting of wavenumber and frequency) spectra are analyzed and compared with data from direct numerical simulation (DNS). The results...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-320
... ABSTRACT Large eddy simulation (LES) of incompressible channel flow at friction Reynolds number of Re τ = 1000 are conducted to investigate the wavenumber-frequency spectrum of turbulent wall pressure fluctuations. To assess the minimal cost of LES for accurately capturing wall-pressure...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-338
... surface fluctuation on internal waves varies as the submarine moves at different cruising speeds. In order to investigate this problem, this paper first qualitatively analyzes the waveform results of internal waves when a submarine model moves at different speeds preserving the free-surface and using...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-366
... sharp edge and relatively large initial height is well predicted by the proposed code while the large water surface fluctuations and high impact velocities are well resolved. INTRODUCTION The global effort towards sustainability and the negative impact of the increasing land exploitation...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-380
... the towing process, the fluctuation range of each room is slightly larger, and the fluctuations are severe. 3.0 2.7 Air pressure (m) 2.4 2.1 1.8 1.5 1.2 0 200 (a) Air pressure in room 1 400 600 Time (s) 800 1000 2677 3.3 3.0 Air pressure (m) 2.7 2.4 2.1 1.8 1.5 0 200 (b) Air pressure in room 2 3.6 400 600...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-274
... strategy fluctuation dtc torque load ABSTRACT The research of BLDC motors control has become the key to the overall control characteristics of AUVs. This paper presents a comparison study on three most popular control strategies for BLDC motors. These three strategies are six-step commutation...
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