scholarly journals CFD and FEM Model of an Underwater Vehicle Propeller

2014 ◽  
Vol 21 (3) ◽  
pp. 40-45 ◽  
Author(s):  
Tadeusz Chruściel ◽  
Ewelina Ciba ◽  
Julita Dopke
Keyword(s):  
Theoretical Basis ◽  
Selective Laser Sintering ◽  
Underwater Vehicle ◽  
Cfd Model ◽  
Remotely Operated Vehicle ◽  
Fem Model ◽  
Design And Optimization ◽  
Propeller Design ◽  
Sintering Method ◽  
Qualitative Analyses

Abstract Within the framework of the project for design and optimization of the Remotely Operated Vehicle (ROV), research on its propulsion has been carried out. Te entire project was supported by CFD and FEM calculations taking into account the characteristics of the underwater vehicle. One of the tasks was to optimize the semi-open duct for horizontal propellers, which provided propulsion and controllability in horizontal plane. In order to create a measurable model of this task it was necessary to analyze numerical methodology of propeller design, along with the structure of a propellers with nozzles and contra-rotating propellers. It was confronted with theoretical solutions which included running of the analyzed propeller near an underwater vehicle. Also preliminary qualitative analyses of a simplified system with contra-rotating propellers and a semi-open duct were carried out. Te obtained results enabled to make a decision about the ROVs duct form. Te rapid prototyping SLS (Selective Laser Sintering) method was used to fabricate a physical model of the propeller. As a consequence of this, it was necessary to verify the FEM model of the propeller, which based on the load obtained from the CFD model. Te article contains characteristics of the examined ROV, a theoretical basis of propeller design for the analyzed cases, and the results of CFD and FEM simulations.

Aerodynamic design and optimization of propellers for multirotor

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Witold Artur Klimczyk
Keyword(s):  
Structural Integrity ◽  
Navier Stokes ◽  
Optimization Approach ◽  
Minimum Thickness ◽  
Design Problems ◽  
Content Type ◽  
Design And Optimization ◽  
Propeller Design ◽  
Unmanned Air Vehicle ◽  
Propeller Blades

Purpose This paper aims to present a methodology of designing a custom propeller for specified needs. The example of propeller design for large unmanned air vehicle (UAV) is considered. Design/methodology/approach Starting from low fidelity Blade Element (BE) methods, the design is obtained using evolutionary algorithm-driven process. Realistic constraints are used, including minimum thickness required for stiffness, as well as manufacturing ones – including leading and trailing edge limits. Hence, the interactions between propellers in hex-rotor configuration, and their influence on structural integrity of the UAV are investigated. Unsteady Reynolds-Averaged Navier–Stokes (URANS) are used to obtain loading on the propeller blades in hover. Optimization of the propeller by designing a problem-specific airfoil using surrogate modeling-driven optimization process is performed. Findings The methodology described in the current paper proved to deliver an efficient blade. The optimization approach allowed to further improve the blade efficiency, with power consumption at hover reduced by around 7%. Practical implications The methodology can be generalized to any blade design problem. Depending on the requirements and constraints the result will be different. Originality/value Current work deals with the relatively new class of design problems, where very specific requirements are put on the propellers. Depending on these requirements, the optimum blade geometry may vary significantly.

scholarly journals Optimization of thrust propeller design for an ROV (Remotely Operated Vehicle) consideration by Genetic Algorithms

2017 ◽  
Vol 138 ◽  
pp. 07003 ◽  
Author(s):  
Aldias Bahatmaka ◽  
Dong-Joon Kim ◽  
Deddy Chrismianto ◽  
Nguyen Hai ◽  
Aditya Rio Prabowo
Keyword(s):  
Genetic Algorithms ◽  
Remotely Operated Vehicle ◽  
Propeller Design

ANSYS-Based Finite Element of Rear Frame in Underground Transport Vehicle

2012 ◽  
Vol 605-607 ◽  
pp. 691-694
Author(s):  
Li Sun
Keyword(s):  
Finite Element ◽  
Theoretical Basis ◽  
Maximum Stress ◽  
Geometrical Model ◽  
Stress And Strain ◽  
Allowable Stress ◽  
Fem Model ◽  
Transport Vehicle ◽  
Design Requirements ◽  
Set Up

Rear frame is an important component of underground transport vehicle, used to carry different functional devices. This paper took rear frame as a research object. First of all, software Proe was used to set up geometrical model; secondly, software ANSYS was used to establish a FEM model to grid and set boundary conditions, and then analyzed rear frame stress and strain in working speed. The results showed that the deformation of rear frame is very small, meets the design requirements; the maximum stress of rear frame is far less than the allowable stress, which meets the strength requirements. It provides important theoretical basis for rear frame’s design.

Assisting the Teleoperation of an Unmanned Underwater Vehicle Using a Synthetic Subsea Scenario

1999 ◽  
Vol 8 (5) ◽  
pp. 520-530 ◽  
Author(s):  
Qingping Lin ◽  
Chengi Kuo
Keyword(s):  
Virtual World ◽  
Research Work ◽  
Underwater Vehicle ◽  
Geometrical Model ◽  
Remotely Operated Vehicle ◽  
Science And Engineering ◽  
Orientation Data ◽  
Underwater Positioning ◽  
Position And Orientation ◽  
Domain Concept

Virtual reality (VR) systems serve as a tool for users to become immersed in a virtual world, navigate through it, and interact with the synthetic objects in real time. Successful applications of VR can be found in many fields outside entertainment ranging from science and engineering to education. In this paper, we present our research work on using a synthetic subsea scenario to assist the navigation of a remotely operated vehicle (ROV) in and around an offshore installation. Our approach takes the ROVs position and orientation data from a sonar-based underwater positioning unit and generates a 3-D synthetic subsea navigation scenario that is based on a geometrical model of the offshore installation. It incorporates the “ROV safety domain” concept to ensure that the synthetic subsea scenario conveys sufficient accuracy for ROV navigation. Our research results have positively demonstrated the feasibility of assisting ROV navigation using a synthetic subsea scenario in combination with the ROV safety domain.

The Visual Information Derived From the Stereo Camera System Mounted on the Underwater Vehicle

2010 ◽  
Author(s):  
Shojiro Ishibashi ◽  
Hiroshi Yoshida ◽  
Tadahiro Hyakudome
Keyword(s):  
Optical Sensors ◽  
Visual Information ◽  
Autonomous Underwater Vehicle ◽  
Vision System ◽  
Underwater Vehicle ◽  
Underwater Vehicles ◽  
Remotely Operated Vehicle ◽  
Camera System ◽  
Stereo Camera ◽  
Camera Systems

The visual information is very important for the operation of an underwater vehicle such as a manned vehicle and a remotely operated vehicle (ROV). And it will be also essential for functions which should be applied to an autonomous underwater vehicle (AUV) for the next generation. Generally, it is got by optical sensors, and most underwater vehicles are equipped with various types of them. Above all, camera systems are applied as multiple units to the underwater vehicles. And they can construct a stereo camera system. In this paper, some new functions, which provide some type of visual information derived by the stereo vision system, are described. And methods to apply the visual information to the underwater vehicle and their utility are confirmed.

Control of Remotely Operated Underwater Vehicle Using Model Predictive Control

2019 ◽  
Vol 161 (A2) ◽  
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Nonlinear Model ◽  
Attitude Control ◽  
Variable Structure ◽  
Underwater Vehicle ◽  
Remotely Operated Vehicle ◽  
Structure Control ◽  
Environment Model ◽  
Point Trajectories

This paper focuses on application of model predictive control on attitude control of remotely operated underwater vehicle. These vehicles are used in scientific, defence and oceanography applications. Remotely Operated Vehicle (ROV) considered in this paper is nonlinear model and complex. MPC is applied on ROV model to track in desired set point trajectories in the presence of uncertainties. Simulation has been carried out in MATLAB environment. Model Predictive Control has given significantly good results compared to PID, Adaptive and Variable structure control.

Static Analysis and Dynamic Analysis of CNC Machine Center Based on ANSYS

2013 ◽  
Vol 816-817 ◽  
pp. 951-956
Author(s):  
Xiao Chen Pang ◽  
Hong Guo
Keyword(s):  
Machine Tool ◽  
Theoretical Basis ◽  
Static Characteristic ◽  
Cnc Machine ◽  
Analysis Software ◽  
Static And Dynamic Characteristics ◽  
Machine Center ◽  
Design And Optimization ◽  
Final Performance ◽  
Important Index

The static characteristic and dynamic characteristic of machine tool is one of the most important factors that affect the performance of machine tool, and it will affect the manufacturing final performance of the machine tool, and it is also an important index to evaluate the machine tool of high performances. Based on finite element structure analysis software ANSYS, the analyses of static and dynamic characteristics of VDL-1000 were conducted. The influencing factors to working accuracy were pointed out and a way was proposed to improve the structure of the machine center. All these can provide an important theoretical basis for the design and optimization of the machine center.

Structural Design and Simulation Analysis of Ejector Used in Automotive Power Steering Oil Discharge Equipment

2013 ◽  
Vol 274 ◽  
pp. 270-273
Author(s):  
Kai Cheng ◽  
Hai Lin Zou ◽  
Xiang Chao Kong ◽  
Jie Tang
Keyword(s):  
Pressure Distribution ◽  
Structural Design ◽  
Theoretical Basis ◽  
Velocity Vector ◽  
Simulation Analysis ◽  
Optimal Size ◽  
Cfd Model ◽  
Power Steering

The structure of ejector used in automotive power steering oil discharge equipment is designed in accordance with the theory of gas-liquid ejector.The two important parameters of the ejector are elected respectively to five values and then 25 ejector models are obtained by the permutations and combinations.The ejector’s CFD model is created by Fluent module of Ansys,then it is divided into a grid and analyzed. Analyse its pressure distribution and velocity vector, which provides the optimal size for the manufacture of the ejectors and a theoretical basis for experiment.

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