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Zhang Yidian – One of the best experts on this subject based on the ideXlab platform.
Archives of Computational Methods in Engineering, 2018Co-Authors: Zhao Huan, Gao Zhenghong, Xu Fang, Zhang YidianAbstract:
The ever-increasing demands for risk-free, resource-efficient and environment-friendly air vehicles motivate the development of advanced Design methodology. As a particularly promising Design methodology considering uncertainties, robust Aerodynamic Design optimization (RADO) is capable of providing robust and reliable Aerodynamic configuration and reducing cost under probable uncertainties in the flight envelop and all life cycle of air vehicle. However, the major challenges including high computational cost with increasing dimensionality of uncertainty and complex RADO procedure hinder the wider application of RADO. In this paper, the complete RADO procedure, i.e., uncertainty modeling, establishment of uncertainty quantification approach as well as robust optimization subject to reliability constraints under uncertainty, is elaborated. Systematic reviews of RADO methodology including uncertainty modeling methods, comprehensive uncertainty quantification approaches, and robust optimization methods are provided. Further, this paper presents a brief survey of the main applications of RADO in the Aerodynamic Design of transonic flow and natural-laminar-flow, and discusses the application prospects of RADO methodology for air vehicles. The detailed statement of the paper indicates the intention, i.e., to present the state of the art in RADO methodology, to highlight the key techniques and primary challenges in RADO, and to provide the beneficial directions for future researches.
Andrew Cashman – One of the best experts on this subject based on the ideXlab platform.
Aerodynamic Design and performance parameters of a lift-type vertical axis wind turbine: A comprehensive reviewRenewable and Sustainable Energy Reviews, 2021Co-Authors: Brian Hand, G. Kelly, Andrew CashmanAbstract:
Abstract The high emission of fossil fuels are major driving forces in renewable energy technology development. In response, the lift-type vertical axis wind turbturbines (VAWT) is experiencing a renewed interest for large-scale offshore wind energy generation and also for small-scale urban devices. Significant research has been published on the Aerodynamic Design and optimisation of VAWTs. In this paper, an attempt is made to review the Aerodynamic Design parameters which influence the VAWT’s Aerodynamic efficiency. Each parameter is discussed in detail regarding their advantages and disadvantages. A baseline VAWT Design has been put forward from this literature review to support VAWT Aerodynamic analysis. Furthermore, areas of future research requiring attention have been identified to further progress the Aerodynamic Design and development of VAWTs.
Dimitri J. Mavriplis – One of the best experts on this subject based on the ideXlab platform.
54th AIAA Aerospace Sciences Meeting, 2016Co-Authors: Enrico Fabiano, Dimitri J. MavriplisAbstract:
This work presents initial optimization results for the Aerodynamic Design Optimization Discussion Group Cases 1 and 3 on unstructured meshes. A sequential quadquadratic programming algorithm is used to drive the constrained optimizations and the objective and constraint functional sensitivities are computed with the discrete adjoint method. After introducing the Aerodynamic flow solvers employed, optimization results are discussed. The two dimensional optimization delivers an optimal solution, but yields higher drag values than other participants, most likely due to the airfoil parameterization employed in this work. The three dimensional optimization converges to a feasible optimum and is in good agreement with the workshop results.
Esther Andrés Pérez – One of the best experts on this subject based on the ideXlab platform.
Application of Surrogate-based Global Optimization to Aerodynamic Design – Application of Surrogate-based Global Optimization to Aerodynamic DesignSpringer Tracts in Mechanical Engineering, 2016Co-Authors: Emiliano Iuliano, Esther Andrés PérezAbstract:
Aerodynamic Design, like many other engineering applications, is increasingly relying on computational power. The growing need for multi-disciplinarity and high fidelity in Design optimization for industrial applications requires a huge number of repeated simulations in order to find an optimal Design candidate. The main drawback is that each simulation can be computationally expensive – this becomes an even bigger issue when used within parametric studies, automated search or optimization loops, which typically may require thousands of analysis evaluations. The core issue of a Design-optimization problem is the search process involved. However, when facing complex problems, the high-dimensionality of the Design space and the high-multi-modality of the target functions cannot be tackled with standard techniques. In recent years, global optimization using meta-models has been widely applied to Design exploration in order to rapidly investigate the Design space and find sub-optimal solutions. Indeed, surrogate and reduced-order models can provide a valuable alternative at a much lower computational cost. In this context, this volume offers advanced surrogate modeling applications and optimization techniques featuring reasonable computational resources. It also discusses basic theory concepts and their application to Aerodynamic Design cases. It is aimed at researchers and engineers who deal with complex Aerodynamic Design problems on a daily basis and employ expensive simulations to solve them
R H Barnard – One of the best experts on this subject based on the ideXlab platform.
, 1996Co-Authors: R H BarnardAbstract:
This book provides an introduction to road vehicle Aerodynamic Design for students, engineers and Designers working in the automotive field. A description of the basic mechanisms of lift and drag production on road vehicles (domestic cars, commercial vehicles and track racing cars) is given together with the principles of drag reduction and the generation of downforce. It explains the physical principles and the methods of experimental measurement that can be used in the study of road vehicle Aerodynamics. Many of the experimental studies conducted in the previous two decades are described. Wind tunnel and road testing methods are considered and a short introduction to computational fluifluid dynamics techinques is included. Using the information provided, the reader should be able to attempt a low-drag conceptual Design, and should be able to assess the reasons for Aerodynamic defects in an existing shape.