STO-Activities: (no title)
Activity title:
Advanced Wind Tunnel Boundary Simulation III
Activity Reference:
AVT-391
Panel:
AVT
Security Classification:
NATO UNCLASSIFIED
Status:
Active
Activity type:
RSM
Start date:
2023-01-01T00:00:00Z
Actual End date:
2025-12-31T00:00:00Z
Keywords:
Common Research Wind Tunnel, Computational Fluid Dynamics CFD, Correction, Interference, Model Support, Uncertainty Quantification, Validation, Validation Experiment, Wall Interference, Wind Tunnel Boundary Interference
Background:
The discipline of performing wind tunnel tests for vehicle design and the need for modifying the data with respect to tunnel wall boundaries and model support hardware has been practiced for decades. Significant improvements of Computational Fluid Dynamics (CFD) methods addressing relevant flow physics and their continuous validation have been achieved in collaboration with dedicated wind tunnel experiments. But for complex flow phenomena, e.g. shock boundary layer interaction, flow separation, buffeting, vortex flows, occurring close to the border of the flight envelope, a strong need for specific and detailed experimental data exists for the development of improved CFD modelling as well as for understanding the flow physics of high-performance air vehicles. Therefore, the requirements for very accurate experimental testing setups are increasing beyond the delivery of integral forces and moments towards very detailed flow field data at various length scales, applying experimental techniques such as Particle Image Velocimetry, Pressure and Temperature Sensitive Paints, and the measurement of the deformation of the vehicle due to aerodynamic loads.
For these types of highly accurate wind tunnel experiments, most detailed representations of the experimental model setup including the wind tunnel boundaries, model hardware support, and inflow/outflow conditions are mandatory. This requires a comprehensive knowledge of experimental and numerical methods as well as their existing limitations, resulting in a demand to exchange the knowledge and experience for the benefit of advancing the capabilities of all partners.
In 2018, NATO STO sponsored the successful AVT-284 Research Workshop on “Advanced Wind Tunnel Boundary Simulation” focused on the evaluation of high-fidelity Reynolds-averaged Navier-Stokes based CFD simulations of wind tunnel boundaries including test section walls, flow paths, and model support hardware. Attendees participated in extensive discussions and strongly advocated for a follow-on workshop, resulting in the AVT-338 “Advanced Wind Tunnel Boundary Simulations II” held virtually in May 2021. It was the objective of the second workshop to provide a forum to evaluate improvements in the development of high-fidelity CFD simulations of wind tunnel wall boundaries and other installation effects and comparison with established results. Compared to the previous workshop, advancements with respect to geometric and flow details of the tunnels resolved were presented. Selected contributions have been published. In addition, the needs for further research and dissemination of knowledge were identified, including ideas of a “Common Research Wind Tunnel” for the NATO STO community, techniques for wind tunnel testing of advanced propulsion systems, and the dissemination of knowledge in form of a follow-on workshop or specialist meeting.
Objectives:
The proposed Specialists Meeting will assess the latest advances and developments in CFD (Reynolds-averaged Navier-Stokes, Detached and Large Eddy Simulations, Lattice Boltzmann, etc.) with respect to the simulation of vehicles in a full wind tunnel environment, including wall boundaries, inflow/outflow geometries, hardware model support, and possible deflections. In addition, the meeting/workshop will develop recommendations in general and with respect to Common Research Wind Tunnel activities (p2022-25), and allow for knowledge dissemination through lectures/courses.
Topics:
The proposed Specialists Meeting to be held in Spring 2025 will have the following topics:
- Discuss general advances in CFD technologies and methods with respect to the simulations of vehicles with complex flow phenomena in wind tunnel, including investigations with different turbulence models and scale resolving methods
- Exchange information about a “Common Research Wind Tunnel” (CRWT, p2022-25) and discuss areas of key interest
- The Specialist Meeting will develop recommendations for further research and for the CRWT activities
Contact:
Open2Partners:
Title:
Created at 19/10/2022 11:00 by System Account
Last modified at 16/05/2024 23:00 by System Account
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