Hydrodynamic shape optimization software

Shape optimization is an infinitedimensional optimization problem. Learn the basic principles of using caeses for automated shape optimization. Software tool for hydrodynamic simulation and shape optimization in turbomachinery description presented cfd computational fluid dynamics software is a tool for numerical fluid flow simulation and shape optimization. Mapping from an initial domain to a new domain is chosen as the design variable. The hydrodynamic analysis is conducted by the boundary element software aqwa 19. Multipoint and multiobjective aerodynamic shape optimization. Several scripts and subroutines have been developed to make the optimization. Designing of the body shape of an autonomous underwater. Mach can perform the simultaneous optimization of aerodynamic shape and structural sizing variables considering aeroelastic deflections. A general introduction to the software connector will be given in order to provide guidelines on how to couple caeses with your simulation software of choice.

Cho and lee 4 developed a numerical method for optimization of a blade shape to improve the hydrodynamic performance of the propeller. Some features of this site may not work without it. To relieve the computational burden, surrogate models are regularly used to speed up the search process 2. Use a virtual towing tank to examine any flow or performance aspect such as hull resistance, selfpropulsion, maneuvering, vessel acceleration, or. Ship maneuvering simulation with confined water effect, harbor traffics, and tug boat operations. Numerical and experimental study on hydrodynamic bulbous bow.

They used a lifting line theory vortex lattice method and. Hull shape optimization for autonomous underwater vehicles. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. Nick hutchins fluid mechanics offers the design technology used in the americas cup to the commercial marine industry. Computational design optimization using rans twentyfourth. Drag estimation and shape optimization of autonomous underwater vehicle. It explains the necessary steps involved in setting up a process chain that allows to automatically optimize the semisubmersible cad model. Napa supports hull form design from optimization in early design phases to. Our solver has been thoroughly validated using model test and real world data for a variety of hulls to ensure solution dependability. Aerodynamic shape optimization by physicsbased surrogates.

Thesoftwarepackages employed in this paper are isight dassault corp. Optimization and analysis of the hydrodynamic coefficients. The major goal of this effort is to utilize the increasing experience gained in using these methods to assess shape optimization techniques and how they might impact design for current and future naval ships. Anuga is a software implementation of a hydrodynamic model which is specifically designed to model wetting and drying processes. Three exploratory hydrodynamic optimization examples are performed to access the computational design methodology. For example, the wing shape is designed and optimized to provide maximum efficiency under a variety of takeoff, cruise, maneuver, loiter, and landing conditions. Pdf highfidelity hydrodynamic shape optimization of a 3. Noise generated by ships is one of the most significant noises in seas, and the propeller has a significant impact on the noise of ships, which reducing it can significantly lower the noise of vessels. Leaps is a software development environment that facilitates modeling, simulating, and analyzing product data provides rich, contextbased product information in user. See the product pages for more information about this software solution. Cho and lee developed a numerical method for optimization of a blade shape to improve the hydrodynamic performance of the propeller. The software, called ensim, is an advanced engine simulation module. This paper presents a solution of a shape optimization problem of a flow field for delaying transition from a laminar flow to a turbulent flow.

Typical industrial applications include reducing the resistance of your hullform, maximizing the efficiency of your pump, lowering the pressure losses through your duct or manifold, or improving the seakeeping behaviour of your offshore platform. Anuga is a joint development project between geoscience australia ga and the australian national university anu. Such method, once developed, would replace inefficient techniques that have been used to date in determining the optimum surface texture shapes. In this article, an innovative hydrodynamic optimization design of bulbous bow hullform under various service conditions resulting from the slow steaming of container vessel is presented, improving the overall performances for the real multivariant usage situations more practical than the single specification of design, which includes both. Apr 11, 2019 download anuga hydrodynamic modeling for free. Using the shape maker for hydrodynamic hull optimization. Aerodynamic and hydrodynamic design and optimization is of primary importance in several disciplines, such as in aircraft design and turbine design. Stachowiak, optimization of surface texture shapes in hydrodynamic contacts. Study on bearings profiles is one of important factors in the hydrodynamic bearings shape optimization. The cfd analysis results reveal the distribution of the hydrodynamic values velocity. Friendship systems your partner for variable geometry, cfd process automation and optimization of flowexposed products additional caeses licenses for your home office many of you are. Recent hydrodynamic tool development and validation for. Our solutions enable analysis of vessel hydrodynamics at full scale, and under realistic operating conditions.

The capability of tonal nonsynchronous vibration prevention using noncircular bearing shapes. Hydrodynamic optimization of the ship hull contour is a multistage, repetitive process that requires the consultants, owners, and designers to combine their economic, hydrodynamic, operational, information technology, geometric modeling, and optimization resources. We are looking for hull shape cfd optimization software easy to learn and use. Internal volume of the vehicle and its hydrodynamic drag are optimized by seamlessly integrating nondomina. Software tool for hydrodynamic simulation and shape optimization in turbomachinery description presented cfd computational fluid dynamics software is a tool for numerical fluid flow simulation and shape optimization in turbomachinery. Development of the create integrated hydrodynamic design. This work presents a solution to some of those challenges by developing a cfd based hydrodynamic shape optimization tool that considers. In addition the study shows coupling of sesam caeses software and sesam hydrod software, which are used in calculation of shape optimization and sea keeping optimization. Is an object that is aerodynamic also hydrodynamic. A parametric study of the general profile for hydrodynamic. In order to build a unity shape optimization model, the study on the general profile of hydrodynamic journal bearings was proposed. King engine bearings has developed a software that simulates engine bearing performance under various conditions. The effect of noncircular bearing shapes in hydrodynamic. Shape optimization we use state of the art optimization techniques to help improve your design for any particular hydrodynamic property as per your desired tradeoff criteria.

Hull shape optimization marine software integration. Hydrocomps flagship hydrodynamic and propulsion system simulation software is built on a physicsbased performance equilibrium of the vesselpropulsordrive system model. The goal of aerodynamic or hydrodynamic shape optimization is to. We used surrogate model based optimization strategy to maximize the hydrodynamic performance of a diffuser, characterized by the increase in pressure ratio, by modifying the shape of the vanes. Early attempts to adopt this e cient, gradient based optimization technique in ship hydrodynamic. The optimization methodology is illustrated in figure 6. Pdf hydrodynamic shape optimization by high fidelity cfd. Our state of the art cfd software and years of expertise enable us to accurately analyse the hydrodynamic performance of any hull form at any operating condition. Aerodynamic or hydrodynamic performance of basic geometric shapes are known aerodynamic and hydrodynamic testing shapes like the sphere, cone, cylinder, cube, ellipsoid, rectangular plate, etc.

In physics and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluidsliquids and gases. This paper discusses the hydrodynamic optimization of hull form mainly. Haftka 3, and wei shyy 4 department of mechanical and aerospace engineering, university of florida, gainesville, fl 32611. Ship wave and motion problems, nonlinear wave dynamics, wavefloating body interaction, air layer drag reduction, and high speed ship hulls. Several studies about using this tool for ship hull optimization have been done. They used a lifting line theory vortex lattice method and a lifting surface theory panel method for calculating the e ciency of propellers. Napa supports hull form design from optimization in early design phases to production fairing. Numerical optimization methods for ship hydrodynamic design.

Nov 04, 2015 hydrodynamic optimization of the ship hull contour is a multistage, repetitive process that requires the consultants, owners, and designers to combine their economic, hydrodynamic, operational, information technology, geometric modeling, and optimization resources. Rbfbased morphing of brep models for use in aerodynamic. Numerical modeling, hydrodynamic design, shape optimization, tesla valve, valveless micropumps, unstructured cartesian grid, evolutionary algorithms. It is capable of calculating the thermodynamic, dynamic, hydrodynamic and mechanical parameters of bearing operation. Optimization of clearance design for high performance engine. Shipmo3d is seakeeping and maneuvering software bem dedicated to the computation of firstorder wave loads on ships and offshore structures added mass, radiation damping, diffraction forces. It solves the linearised potential flow problem by a dawson type panel method. The software has been successfully used in the past by the present authors in various optimization studies, including hydrodynamic shape design 11 12. Solutions for ship hull designers friendship systems ag. It is possible but there are often significant differences to the way in which some aircraft are designed, particularly as most aircraft have to generate lift using their wings while boats, ships and submarines use buoyancy instead.

Hydrodynamic performance engineering is critical to the optimal design of any vessel. Several scripts and subroutines have been developed to make the optimization work automatically. Tank testing of the hull shape still the most accurate method for determining the hydrodynamic characteristics of the ship. Hull form hydrodynamic optimization based on parametric. The main objectives of this optimization were to reduce the propeller noise. Optimization of clearance design for high performance. All examples are programmed in two space dimensions a 3d version is under current development. Hydrodynamic shape optimization for naval vehicles request pdf. Furthermore, the space of allowable shapes over which the optimization is performed does not admit a vector space structure, making application of traditional optimization methods more difficult. Highfidelity hydrodynamic shape optimization of a 3d hydrofoil article pdf available in journal of ship research 594.

Improving the hydrodynamic performance of diffuser vanes. Hydrodynamic shape optimization by high fidelity cfd solver. Pdf highfidelity hydrodynamic shape optimization of a 3d. Multiobjective shape optimization of submarine hull using. For ship design friendship systems ag friendship systems ag. Hydrodynamic hull form optimization using parametric models. See the product pages for more information about this software.

Besides potential flowbased optimization studies, some researchers also carried out highfidelity hydrodynamic shape optimization for hydrofoils, and marine vessels wilson et al. This package is the cutting edge of viscous flow analysis used in the maritime and offshore industry, able to determine the total hydrodynamic. Shape optimization of flow field improving hydrodynamic stability. Improving the hydrodynamic performance of diffuser vanes via. The optimization technique is based on sequential linear.

In the naval hydrodynamic context, the rapidly growing amount of papers devoted to optimal shape design of marine vehicles e. Hydrodynamic analysis and shape optimization for vertical. Ship wave and motion problems, nonlinear wave dynamics, wave. This process typically starts with the creation of a reference model using a computeraided design cad software. The approach aims at finding the optimal texture shape that supports the maximum load andor minimizes friction losses in one dimensional hydrodynamic bearings. Shape optimization of an autonomous underwater vehicle with a. Paper open access design and optimization of a blended. It is based on a new approach to modeling 3d stationary and non. Shape optimization in ship hydrodynamics using computational fluid. Energies free fulltext a shape optimization method of a.

A unified computational approach to the optimization of. These optimizations include the redesign of a modern marine propeller for improved cavitation performance, redesign of a bow bulb on a surface combatant to reduce downstream vortices, and the redesign of a rudder in the wake of a. The shape of the diffuser vanes was defined by a combination of bezier curves and a circular arc. It has several subdisciplines, including aerodynamics the study of air and other gases in motion and hydrodynamics the study of liquids in motion. This training is suitable for cfd engineers seeking a reliable tool for shape optimisation. It has several subdisciplines, including aerodynamics the study of air and. Nick hutchins fluid mechanics provides hardware, software and most importantly, technical expertise, allowing you to utilise computational fluid dynamics to optimise your designs and provide your clients with a superior product. A computational framework for hydrodynamic shape optimization of complex ship hull form is proposed and applied to improve the calm water performance of the kriso container ship kcs. Computational fluid dynamics finemarine fluid dynamics analysis is performed using the cfd software finemarine. A multiobjective optimization framework is developed for design of submarine hull shape. The hydrodynamics modules support resistance, powering, seakeeping and maneuvering calculations by industry standard methodologies. In order to build a unity shape optimization model, the study on the general profile of hydrodynamic. Learn the basic principles of using caeses for automated shape optimization studies.

Numerical simulation and hydrodynamic design optimization of. The study has been carried out using an integrated tool for hydrodynamic optimization, incorporating a cad modeler for definition and parametric modification of hull forms, cfd codes for the evaluation of hydrodynamic performance and software for optimization and decision making. Shape optimization theory and applications in hydrodynamics. We develop and distribute our software caeses to naval architects and other engineers that are interested in smarter parametric modeling of ship hulls for the cfddriven shape optimization. The development of an optimization system method for surface textures in hydrodynamic contacts is of great importance to tribology. The chosen optimization variable is the drag hydrodynamic factor, which allow controlling the shape. Haftka 3, and wei shyy 4 department of mechanical and aerospace. Numerical simulation and hydrodynamic design optimization. It has been and is currently applied in practical ship hull design and optimization. What software is used for aerodynamic wing shape optimization. Twodimensional bearings, oral presentation at asiatrib 2010 4th international tribology congress, december 2010, perth, western australia invited talk a. As mentioned, the framework used for the hydrodynamic shape optimization of the hull form relies on three main methods. Napa is a trusted industry standard for hull form design.

An autonomous underwater vehicle auv is a versatile research tool for. Paper open access design and optimization of a blendedwing. Younga,1 adepartment of naval architecture and marine engineering, university of michigan, mi 48109, usa bdepartment of aerospace engineering, university of michigan, mi 48109, usa abstract with recent advances in high performance computing. Shape optimization has a long tradition in design engineering. Hydrodynamic shape optimization by high fidelity cfd. Fabm has been coupled to several hydrodynamic models, including gotm, getm, glm, mom4 and mom5.

Improvements of ship performance achieved by the proposed fspline procedure are demonstrated through. In this study, a genetic algorithm was used to optimize the hydroacoustic and hydrodynamic performance of propellers. This work presents a solution to some of those challenges by developing a cfdbased hydrodynamic shape optimization tool that considers. The hydrodynamic shape optimization is rarely applied in the context of the bwbug design since the existing optimization methodologies and design tools are not suf. Hydroacoustic and hydrodynamic optimization of a marine. Use a virtual towing tank to examine any flow or performance aspect such as hull resistance, selfpropulsion, maneuvering, vessel acceleration, or appendage shape. Request pdf shape optimization in ship hydrodynamics using computational.