Journal of Hydrodynamics, Journal Year: 2023, Volume and Issue: 35(6), P. 1089 - 1100
Published: Dec. 1, 2023
Language: Английский
Journal of Marine Science and Application, Journal Year: 2024, Volume and Issue: 23(1), P. 1 - 22
Published: Feb. 26, 2024
Abstract In this paper, we present an overview of numerical simulation methods for the flow around typical underwater vehicles at high Reynolds numbers, which highlights dominant structures in different regions interest. This covers forebody, midbody, stern, wake region, and appendages summarizes phenomena, including laminar-to-turbulent transition, turbulent boundary layers, under influence curvatures, interactions, all associated complex vortex structures. Furthermore, current issues challenges capturing these are addressed. provides a deep insight into use methods, Reynolds-averaged Navier–Stokes (RANS) method, large eddy (LES) hybrid RANS/LES evaluates their applicability detailed features.
Language: Английский
Citations
6
Applied Sciences, Journal Year: 2025, Volume and Issue: 15(4), P. 2084 - 2084
Published: Feb. 17, 2025
Hydrodynamic noise is induced by hydrodynamic phenomena, such as pressure fluctuations, shear layers, and eddy currents, which have a significant impact on ship performance, pumping equipment efficiency, detection accuracy, the living environment of marine organisms. Specifically, increases fluid resistance around hull, reduces speed fuel affects stealthiness military vessels; whereas, in equipment, generation usually accompanied energy loss mechanical vibration, resulting reduced efficiency accelerated wear tear equipment. Traditional physical experiments, theoretical modeling, numerical simulation methods occupy key position research, but each their own limitations: experiments are limited experimental conditions, make it difficult to comprehensively reproduce characteristics complex flow field; modeling appears be simplified idealized cope with multiscale mechanism; methods, although accurate, deficient sense that they computationally expensive adapt boundary conditions. In recent years, intelligent algorithms represented data-driven heuristic gradually emerged, showing great potential for development optimization applications. To this end, paper systematically reviews progress application focusing advantages optimal design sources, prediction, control strategy optimization. Meanwhile, analyzes problems data scarcity, computational model interpretability faced current looks forward possible improvements brought hybrid including information neural networks, future research directions. It hoped review can provide useful references practical engineering applications involving noise, point way toward further exploration related fields.
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(7)
Published: July 1, 2024
During the cruise status of an underwater high-speed vehicle, flow around vehicle's head typically transitions from a laminar to turbulent state, triggering noise that can interfere with normal operation sonar. In order accurately investigate this through numerical simulation, high-fidelity field solution is essential. Common traditional turbulence simulation methods, such as unsteady Reynolds-averaged and large eddy (LES), struggle capture high-frequency fluctuations due their inability directly resolve small-scale structures, which results in compromising accuracy noise. To address issue, paper employs direct (DNS) achieve resolution field, thereby enabling more accurate assessment distribution on surface. Meanwhile, considering significant computational resources required solve entire high Reynolds number environment, study also incorporates fixed transition modeling method stability theory confine DNS domain vicinity transitional zone improve efficiency. Comparative analysis monitoring laminar, transitional, zones revealed source exhibits lowest amplitude across all frequencies, while features highest amplitude, approximately 10 dB higher than zone. Moreover, amplitudes components (above 30 kHz) are detected both zones. Additionally, LES Smagorinsky model simulate within same DNS, demonstrating limitations model-based capturing
Language: Английский
Citations
3
Heliyon, Journal Year: 2024, Volume and Issue: 10(8), P. e29632 - e29632
Published: April 1, 2024
Ship noise emission has many environmental impacts. Recognizing noise-generating source and investigating reduction techniques is the first step in elimination or of these harmful effects. Studies show that ship propeller one main sources emission. Ducted well-known solutions for reduction. In this paper, results numerical solution governing mathematical equations far field presented sound pressure level calculated using Ffowcs Williams Hawkings (FWH) equations. Numerical validated by valid research resources. Propeller also experimental measurements filtering ambient frequencies. Finally, a comparison been made between effect duct on calculated. The measured SPL emitted from CFD approach (solving FWH) shows 28% ducted with without duct. (after removing noise) 37%
Language: Английский
Citations
2
Journal of Marine Science and Technology, Journal Year: 2024, Volume and Issue: 29(2), P. 418 - 431
Published: April 23, 2024
Language: Английский
Citations
1
Journal of Hydrodynamics, Journal Year: 2023, Volume and Issue: 35(4), P. 757 - 769
Published: Aug. 1, 2023
Language: Английский
Citations
1
Journal of Hydrodynamics, Journal Year: 2023, Volume and Issue: 35(5), P. 1008 - 1026
Published: Oct. 1, 2023
Language: Английский
Citations
0
Journal of Hydrodynamics, Journal Year: 2023, Volume and Issue: 35(6), P. 1089 - 1100
Published: Dec. 1, 2023
Language: Английский
Citations
0