Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Neural Net-Based Redesign of Transonic Turbines for Improved Unsteady Aerodynamic Performance
Author: NEURAL NET-BASED REDESIGN OF TRANSONIC TURBINES FOR IMPROVED UNSTEADY AERODYNAMIC PERFORMANCE... NASA/TM-1998-208754... MAR. 1, 1999
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Improving the Unsteady Aerodynamic Performance of Transonic Turbines Using Neural Networks
Author: National Aeronautics and Space Adm NasaPublisher:
ISBN: 9781724085658
Category :
Languages : en
Pages : 28
Book Description
A recently developed neural net-based aerodynamic design procedure is used in the redesign of a transonic turbine stage to improve its unsteady aerodynamic performance. The redesign procedure used incorporates the advantages of both traditional response surface methodology and neural networks by employing a strategy called parameter-based partitioning of the design space. Starting from the reference design, a sequence of response surfaces based on both neural networks and polynomial fits are constructed to traverse the design space in search of an optimal solution that exhibits improved unsteady performance. The procedure combines the power of neural networks and the economy of low-order polynomials (in terms of number of simulations required and network training requirements). A time-accurate, two-dimensional, Navier-Stokes solver is used to evaluate the various intermediate designs and provide inputs to the optimization procedure. The procedure yielded a modified design that improves the aerodynamic performance through small changes to the reference design geometry. These results demonstrate the capabilities of the neural net-based design procedure, and also show the advantages of including high-fidelity unsteady simulations that capture the relevant flow physics in the design optimization process. Rai, Man Mohan and Madavan, Nateri K. and Huber, Frank W. Ames Research Center NASA/TM-1999-208791, NAS 1.15:208791, A-99V0041...
Improving the Unsteady Aerodynamic Performance of Transonic Turbines Using Neural Networks
Author: Nasa Technical Reports Server (Ntrs)Publisher: BiblioGov
ISBN: 9781289275594
Category :
Languages : en
Pages : 30
Book Description
A recently developed neural net-based aerodynamic design procedure is used in the redesign of a transonic turbine stage to improve its unsteady aerodynamic performance. The redesign procedure used incorporates the advantages of both traditional response surface methodology and neural networks by employing a strategy called parameter-based partitioning of the design space. Starting from the reference design, a sequence of response surfaces based on both neural networks and polynomial fits are constructed to traverse the design space in search of an optimal solution that exhibits improved unsteady performance. The procedure combines the power of neural networks and the economy of low-order polynomials (in terms of number of simulations required and network training requirements). A time-accurate, two-dimensional, Navier-Stokes solver is used to evaluate the various intermediate designs and provide inputs to the optimization procedure. The procedure yielded a modified design that improves the aerodynamic performance through small changes to the reference design geometry. These results demonstrate the capabilities of the neural net-based design procedure, and also show the advantages of including high-fidelity unsteady simulations that capture the relevant flow physics in the design optimization process.
Improving the Unsteady Aerodynamic Performance of Transonic Turbines Using Neural Networks
Author: Man Mohan RaiAxial Turbine Aerodynamics for Aero-engines
Author: Zhengping ZouPublisher: Springer
ISBN: 9811057508
Category : Technology & Engineering
Languages : en
Pages : 572
Book Description
This book is a monograph on aerodynamics of aero-engine gas turbines focusing on the new progresses on flow mechanism and design methods in the recent 20 years. Starting with basic principles in aerodynamics and thermodynamics, this book systematically expounds the recent research on mechanisms of flows in axial gas turbines, including high pressure and low pressure turbines, inter-turbine ducts and turbine rear frame ducts, and introduces the classical and innovative numerical evaluation methods in different dimensions. This book also summarizes the latest research achievements in the field of gas turbine aerodynamic design and flow control, and the multidisciplinary conjugate problems involved with gas turbines. This book should be helpful for scientific and technical staffs, college teachers, graduate students, and senior college students, who are involved in research and design of gas turbines.
Proceedings of the FISITA 2012 World Automotive Congress
Author: SAE-ChinaPublisher: Springer Science & Business Media
ISBN: 3642338356
Category : Technology & Engineering
Languages : en
Pages : 922
Book Description
Proceedings of the FISITA 2012 World Automotive Congress are selected from nearly 2,000 papers submitted to the 34th FISITA World Automotive Congress, which is held by Society of Automotive Engineers of China (SAE-China ) and the International Federation of Automotive Engineering Societies (FISITA). This proceedings focus on solutions for sustainable mobility in all areas of passenger car, truck and bus transportation. Volume 7: Vehicle Design and Testing (I) focuses on: •Vehicle Performance Development •Vehicle Integration Platformized and Universal Design •Development of CAD /CAE/CAM and CF Methods in Automotive Practice •Advanced Chassis, Body Structure and Design •Automotive Ergonomic, Interior and Exterior Trim Design •Vehicle Style and Aerodynamic Design •New Materials and Structures Above all researchers, professional engineers and graduates in fields of automotive engineering, mechanical engineering and electronic engineering will benefit from this book. SAE-China is a national academic organization composed of enterprises and professionals who focus on research, design and education in the fields of automotive and related industries. FISITA is the umbrella organization for the national automotive societies in 37 countries around the world. It was founded in Paris in 1948 with the purpose of bringing engineers from around the world together in a spirit of cooperation to share ideas and advance the technological development of the automobile.
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1154
Book Description
Author: 
Author: