NICOP - Data integrated models of unsteady ship hydrodynamic forces
Abstract
Data integrated models of unsteady ship hydrodynamic forcesTechnical Description: This project will develop models of the unsteady fluid forcesexperience by multiple interacting bodies by synthesising data from experiments, such ashigh-resolution Particle Image Velocimetry (PIV) and force measurements, into highspeedComputational Fluid Dynamics (CFD) methods. Using the experimental data toinvert for quantified models of the local fluid dynamics will vastly reduce the overallpredictive cost while reducing generalization error. This class of flow is of practicalengineering interest to the Navy and covers a wide range of high-impact scientific issuesincluding unsteady fluid structure interaction, and turbulence generation and evolution.Moreover, the high-speed data-analysis framework generated by this project will begeneral, and enable accurate and robust force and full-field predictions across a varietyof systems in continuum and multi-phase mechanics.The project will be carried out over three phases with each phase performed in each yearof the project. In the first phase, the focus will be on collection of novel high-fidelityexperimental and numerical data that will be used to develop and validate newmodelling methodologies. The second phase of the project will involve development ofnew methods to integrate machine-learning into a high-speed CFD solver. In the thirdphase, the high-fidelity data will be used to train the high-speed integrated method toreproduce the observed unsteady flow features and forces ~ with emphasis oncharacterizing and minimizing the reliance on expensive measurement data and highresolutionsimulations.US Collaborators: Dr Woei-Min Lin, ONR Program Officer.Naval relevance: The integration of physical measurements with high-speed simulationhas potential to enable new control strategies for naval vehicles that may enable energysavings, high maneuverability, improved sea-keeping, and surface detection andmonitoring. The ultimate goal of this project is to develop integrated measurements thatmay be utilized with real-time concurrent simulations of vessels in order to provide realtimeforce estimation or real-time field property estimation. This could be used in theride control of high speed vessels, control in maneuvering vessels to minimize energyexpenditure from accelerations, monitor damage to critical control surfaces, monitor andcontrol critical flow conditions such as cavitation or separation on control surfaces, orprovide real time estimates of surface geometries for underwater detection problems.Desired outcomes: The specific outcomes of the project are:1. High-fidelity numerical and experimental data on naval multi-body unsteady fluidstructureinteractions.2. Conference presentations and journal papers on the physics of these systems.3. New algorithms and numerical tools for the integration of data into CFDsimulations.4. Conference presentations and journal papers on the use of data integratedmodels to predict unsteady ship hydrodynamic forces.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N629091812091
Entities
People
- Gabriel D Weymouth
Organizations
- Office of Naval Research
- United States Navy
- University of Southampton