Download or read book A General Multidisciplinary Turbomachinery Design Optimization System Applied to a Transonic Fan written by Ahmed M. F. Nemnem and published by . This book was released on 2014 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blade geometry design process is integral to the development and advancement of compressors andturbines in gas generators or aeroengines. A new airfoil section design capability has been added to an opensource parametric 3D blade design tool. Curvature of the meanline is controlled using B-splines to createthe airfoils. The curvature is analytically integrated to derive the angles and the meanline is obtained byintegrating the angles. A smooth thickness distribution is then added to the airfoil to guarantee a smoothshape while maintaining a prescribed thickness distribution. A leading edge B-spline definition has alsobeen implemented to achieve customized airfoil leading edges which guarantees smoothness with parametriceccentricity and droop. An automated turbomachinery design and optimization system has been created. An existing splitteredtransonic fan is used as a test and reference case. This design was more general than a conventional designto have access to the other design methodology. The whole mechanical and aerodynamic design loopsare automated for the optimization process. The flow path and the geometrical properties of the rotor areinitially created using the axi-symmetric design and analysis code (T-AXI). The main and splitter bladesare parametrically designed with the created geometry builder (3DBGB) using the new added features (curvature technique). The solid model creation of the rotor sector with a periodic boundaries combining themain blade and splitter is done using MATLAB code directly connected to SolidWorks including the hub, fillets and tip clearance. A mechanical optimization is performed with DAKOTA (developed by DOE) toreduce the mass of the blades while keeping maximum stress as a constraint with a safety factor. A Geneticalgorithm followed by Numerical Gradient optimization strategies are used in the mechanical optimization. The splittered transonic fan blades mass is reduced by 2.6% while constraining the maximum stress below50% material yield strength using 2D sections thickness and chord multipliers. Once the initial design was mechanically optimized, a CFD optimization was performed to maximizeefficiency and/or stall margin. The CFD grid generator (AUTOGRID) reads 3DBGB output and accountsfor hub fillets and tip gaps. Single and Multi-objective Genetic Algorithm (SOGA, MOGA) optimizationhave been used with the CFD analysis system. In SOGA optimization, efficiency was increased by 3.525%from 78.364% to 81.889% while only changing 4 design parameters. For MOGA optimization with higherweighting efficiency than stall margin, the efficiency was increased by 2.651% from 78.364% to 81.015%while the static pressure recovery factor was increased from 0.37407 to 0.4812286 that consequently increases the stall margin. The design process starts with a hot shape design, and then a hot to cold transformation process is explainedonce the optimization process ends which smoothly subtracts the mechanical deflections from thehot shape. This transformation ensures an accurate tip clearance. The optimization modules can be customized by the user as one full optimization or multiple small ones. This allows the designer not to be eliminated from the design loop which helps in taking the right choice ofparameters for the optimization and the final feasible design.
Download or read book Preliminary Multi Disciplinary Optimization in Turbomachinery Design written by V. Panchenko and published by . This book was released on 2003 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gas turbine engine is a complex aerodynamic machine with performance, structural and manufacturability challenges. This paper gives an overview of a multidisciplinary optimization approach applied to the conceptual design of small aircraft engines. A description of major turbomachinery disciplines and the numerous interactions between disciplines is given followed by a discussion of the need for preliminary design optimization. The approach to development of such a system undertaken at Pratt & Whitney Canada is described including identification of appropriate design tools and their influence on the geometrical definition of an engine cross-section. Finally, preliminary optimization results are presented.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Optimization and Multidisciplinary Design in Aeronautics and Turbomachinery written by Jacques Periaux and published by . This book was released on 2012 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Optimization and Multidisciplinary Design in Aeronautics and Turbomachinery written by Von Karman Institute for Fluid Dynamics and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1994 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 300 written by and published by . This book was released on 1994 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 261 written by and published by . This book was released on 1991 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 248 written by and published by . This book was released on 1990 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 235 written by and published by . This book was released on 1989 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FY US Air Force Plan for Defense Research Sciences written by and published by . This book was released on 1984 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimization and Computational Fluid Dynamics written by Dominique Thévenin and published by Springer Science & Business Media. This book was released on 2008-01-08 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical optimization of practical applications has been an issue of major importance for the last 10 years. It allows us to explore reliable non-trivial configurations, differing widely from all known solutions. The purpose of this book is to introduce the state-of-the-art concerning this issue and many complementary applications are presented.
Download or read book Engineering Design Optimization written by Joaquim R. R. A. Martins and published by Cambridge University Press. This book was released on 2021-11-18 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on course-tested material, this rigorous yet accessible graduate textbook covers both fundamental and advanced optimization theory and algorithms. It covers a wide range of numerical methods and topics, including both gradient-based and gradient-free algorithms, multidisciplinary design optimization, and uncertainty, with instruction on how to determine which algorithm should be used for a given application. It also provides an overview of models and how to prepare them for use with numerical optimization, including derivative computation. Over 400 high-quality visualizations and numerous examples facilitate understanding of the theory, and practical tips address common issues encountered in practical engineering design optimization and how to address them. Numerous end-of-chapter homework problems, progressing in difficulty, help put knowledge into practice. Accompanied online by a solutions manual for instructors and source code for problems, this is ideal for a one- or two-semester graduate course on optimization in aerospace, civil, mechanical, electrical, and chemical engineering departments.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1978 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
