Flow characteristics comparison of PIV and numerical prediction results for an unmanned underwater vehicle positioned close to the free surface

Kilavuz, A.; Özgören, Muammer; Kavurmacıoğlu, Levent; Durhasan, Tahir; Sarigiguzel, F.; Şahi̇n, Beşi̇r; Akıllı, Hüseyin; Sekeroglu, E.; Yanıktepe, Bülent

doi:10.1016/j.apor.2022.103399

Cited by 18 publications

(4 citation statements)

References 31 publications

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“…Specifically: For Case 1, the peak occurs at x = 1.25 mm; For Case 2, the zenith is at x = 3.16 mm; For Case 3, the maximum is registered at x = 3.40 mm. In the research conducted by Kilavuz et al (2022), an accelerated flow develops the jet-like flow region within the constricted region between the upper surface of the unmanned underwater vehicle (UUV) body and the free surface. Therefore, the wall jet induced in this paper exhibits a similar trend of velocity change in the wall normal direction.…”

Section: Time-averaged Flow Fields From Piv Measurementsmentioning

confidence: 99%

Optimizing electrode arrangement in plasma actuators: a study on induced velocity and efficiency

Zhou,

Yousif,

Zhang

et al. 2024

Fluid Dyn. Res.

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This study investigates the performance of two types of multi-encapsulated electrode (MEE) plasma actuators, compared to a typical dielectric barrier discharge (DBD) plasma, in quiescent air. Our objective is to determine whether the multiple encapsulated structures can enhance the performance of the plasma actuator. We analyse the flow field using particle image velocimetry (PIV) and schlieren visualisation and calculate the distribution of body force over the gas volume based on the Navier–Stokes equations from velocity measurements. Our findings demonstrate that the starting vortex behaviour is influenced by electrode arrangement. Specifically, we observe that when the first encapsulated electrode is positioned closer to the exposed electrode, then a significantly higher induced velocity can be obtained compared to the baseline condition. In fact, the induced velocity can be increased by up to 1.5 times under this optimise configuration. These results highlight the importance of electrode arrangement in the plasma actuator design. Based on our body force estimation, we find that MEE plasma actuators exhibite a significantly higher momentum transfer, particularly in the wall normal direction. Our investigation on the mechanical efficiency also reveals that the optimised configuration proposed in the present study can significantly enhance the efficiency. In fact, we observe a four-fold increase in maximum efficiency compared to the typical configuration. These results suggest that the proposed configuration could be a promising solution for improving the mechanical efficiency of plasma actuators.

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Section: Time-averaged Flow Fields From Piv Measurementsmentioning

confidence: 99%

Optimizing electrode arrangement in plasma actuators: a study on induced velocity and efficiency

Zhou,

Yousif,

Zhang

et al. 2024

Fluid Dyn. Res.

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“…Their simulation results demonstrated the effectiveness of the proposed algorithm. Kilavuz et al [52] carried out numerical and experimental investigations of the flow characteristics of UUVs with a commonly used Myring profile. They used CFD and the particle image velocimetry (PIV) technique under the influence of a free surface.…”

Section: Uuv Control System Designmentioning

confidence: 99%

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

Bashir,

Khan,

Iqbal

et al. 2023

Sustainability

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Unmanned underwater vehicles (UUVs) have become increasingly popular in recent years due to their use in various applications. The motivations for using UUVs include the exploration of difficult and dangerous underwater environments, military tasks in mine detection, intelligence gathering and surveillance, the inspection of offshore oil and gas infrastructure in the oil and gas industry, scientific research for studying marine life, and the search and rescue of missing persons or submerged airplanes or boats in underwater environments. UUVs offer many advantages in achieving the desired applications with increased safety, efficiency, and cost-effectiveness. However, there are also several challenges associated with their communication, navigation, power requirements, maintenance, and payload limitations. These types of vehicles are also prone to various disturbances caused by currents of the ocean, propulsion systems, and unmolded uncertainties. Practically, it is a challenging task to design a controller that will ensure optimal performance under these conditions. Therefore, the control system design is of prime importance in the overall development of UUVs. Also, the UUV controller receives input from different sensors, and the data from these sensors are used by the controller to perform different tasks. The control systems of UUVs should take into account all uncertainties and make them stable so that all sensors can perform optimally. This paper presents a complete review of different control system design algorithms for UUVs. The basic logic designs of several control system algorithms are also presented. A comparison is made based on reliability, robustness, precession, and the ability of the controller to handle the nonlinearity that is faced by UUVs during their missions. Simulation and experimental results are thoroughly studied to gain insight into each algorithm. The advantages and disadvantages of each algorithm are also presented, which will facilitate the selection of a suitable algorithm for the control system design of UUVs.

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“…Yagmur et al used Large Eddy Simulation and PIV methods to compare the flow characteristics around an equilateral triangular cylinder [ 3 ]. Kilavuz et al investigated an unmanned underwater vehicle near the free surface using PIV and numerical prediction [ 4 ]. They compared the 3-D and two-phase flow simulation generated using the Volume of Fluid (VOF) model with the Large Eddy Simulation (LES) turbulence model, with the PIV technique under the influence of the free surface.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on a trimaran airwake, geometry modification

Vakilabadi,

Ghafari,

Ghassemi

2023

Heliyon

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Flow characteristics comparison of PIV and numerical prediction results for an unmanned underwater vehicle positioned close to the free surface

Cited by 18 publications

References 31 publications

Optimizing electrode arrangement in plasma actuators: a study on induced velocity and efficiency

Optimizing electrode arrangement in plasma actuators: a study on induced velocity and efficiency

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

Experimental and numerical investigation on a trimaran airwake, geometry modification

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