Design Geometry and Design/Off-Design Performance Computer Codes for Compressors and Turbines

Design Geometry and Design/Off-Design Performance Computer Codes for Compressors and Turbines PDF

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-08-16

Total Pages: 34

ISBN-13: 9781725639935

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This report summarizes some NASA Lewis (i.e., government owned) computer codes capable of being used for airbreathing propulsion system studies to determine the design geometry and to predict the design/off-design performance of compressors and turbines. These are not CFD codes; velocity-diagram energy and continuity computations are performed fore and aft of the blade rows using meanline, spanline, or streamline analyses. Losses are provided by empirical methods. Both axial-flow and radial-flow configurations are included. Glassman, Arthur J. Unspecified Center NASA-CR-198433, NAS 1.26:198433, E-10041, NIPS-95-06493 NAG3-1165; RTOP 505-69-50...

Off-Design Computer Code for Calculating the Aerodynamic Performance of Axial-Flow Fans and Compressors

Off-Design Computer Code for Calculating the Aerodynamic Performance of Axial-Flow Fans and Compressors PDF

Author: National Aeronautics and Space Adm Nasa

Publisher:

Published: 2018-11-07

Total Pages: 96

ISBN-13: 9781730977305

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An off-design axial-flow compressor code is presented and is available from COSMIC for predicting the aerodynamic performance maps of fans and compressors. Steady axisymmetric flow is assumed and the aerodynamic solution reduces to solving the two-dimensional flow field in the meridional plane. A streamline curvature method is used for calculating this flow-field outside the blade rows. This code allows for bleed flows and the first five stators can be reset for each rotational speed, capabilities which are necessary for large multistage compressors. The accuracy of the off-design performance predictions depend upon the validity of the flow loss and deviation correlation models. These empirical correlations for the flow loss and deviation are used to model the real flow effects and the off-design code will compute through small reverse flow regions. The input to this off-design code is fully described and a user's example case for a two-stage fan is included with complete input and output data sets. Also, a comparison of the off-design code predictions with experimental data is included which generally shows good agreement. Schmidt, James F. Unspecified Center...

Fluid Mechanics and Thermodynamics of Turbomachinery

Fluid Mechanics and Thermodynamics of Turbomachinery PDF

Author: S. Larry Dixon

Publisher: Elsevier

Published: 2005-03-30

Total Pages: 414

ISBN-13: 0080470629

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The new edition will continue to be of use to engineers in industry and technological establishments, especially as brief reviews are included on many important aspects of Turbomachinery, giving pointers towards more advanced sources of information. For readers looking towards the wider reaches of the subject area, very useful additional reading is referenced in the bibliography. The subject of Turbomachinery is in continual review, and while the basics do not change, research can lead to refinements in popular methods, and new data can emerge. This book has applications for professionals and students in many subsets of the mechanical engineering discipline, with carryover into thermal sciences; which include fluid mechanics, combustion and heat transfer; dynamics and vibrations, as well as structural mechanics and materials engineering. An important, long overdue new chapter on Wind Turbines, with a focus on blade aerodynamics, with useful worked examples Includes important material on axial flow compressors and pumps Example questions and answers throughout

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