Download or read book Impact of Periodic Unsteadiness on Performance and Heat Load in Axial Flow Turbomachines written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an analytical and experimental investigation, directed at the understanding of the impact of periodic unsteadiness on the time-averaged flows in axial flow turbomachines, are presented. Analysis of available experimental data, from a large-scale rotating rig (LSRR) (low speed rig), shows that in the time-averaged axisymmetric equations the magnitude of the terms representing the effect of periodic unsteadiness (deterministic stresses) are as large or larger than those due to random unsteadiness (turbulence). Numerical experiments, conducted to highlight physical mechanisms associated with the migration of combustor generated hot-streaks in turbine rotors, indicated that the effect can be simulated by accounting for deterministic stress like terms in the time-averaged mass and energy conservation equations. The experimental portion of this program shows that the aerodynamic loss for the second stator in a 1-1/2 stage turbine are influenced by the axial spacing between the second stator leading edge and the rotor trailing edge. However, the axial spacing has little impact on the heat transfer coefficient. These performance changes are believed to be associated with the change in deterministic stress at the inlet to the second stator. Data were also acquired to quantify the impact of indexing the first stator relative to the second stator. For the range of parameters examined, this effect was found to be of the same order as the effect of axial spacing. Sharma, Om P. and Stetson, Gary M. and Daniels, William A, and Greitzer, Edward M. and Blair, Michael F. and Dring, Robert P. Glenn Research Center NASA-CR-202319, NAS 1.26:202319, E-10624, FR-24232 NAS3-25804; RTOP 538-06-14...

Download or read book Impact of Periodic Unsteadiness on Performance and Heat Load in Axial Flow Turbomachines written by and published by . This book was released on 1997 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASME Technical Papers written by and published by . This book was released on 2000 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Indexes to Publications written by American Society of Mechanical Engineers and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains indexes to all ASME papers and publications. Periodical indexed are : Mechanical engineering, Journal of engineering for power, Journal of engineering for industry, Journal of heat transfer, Journal of basic engineering, Journal of applied mechanics, Journal of lubrication technology, Applied mechanics reviews, Mechanical Engineers' and product directory.

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Download or read book Fluid Mechanics Thermodynamics of Turbomachinery written by Sydney Lawrence Dixon and published by Pergamon. This book was released on 1978 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and updated, this well established and highly successful book gives a competent account of the fundamental theory of turbomachines. A concise and unified approach to the subject is employed which fills the need for a comprehensive introductory text suitable for most engineering curricula. The theoretical approach, based firmly on the fundamental principles of thermodynamics and fluid mechanics, makes the book particularly suitable for undergraduate courses. It has also proved very useful to professional engineers who require a relevant text on the basic physical processes in turbomachines and their theoretical representation. Several modifications have been incorporated in the text in the light of recent advances in the subject. Further information on cavitation has been included and a new section on the optimum design of a pump inlet taking account of cavitation limitations has been added. Certain chapters have been extended: the section on 'Constant specific mass flow' design now includes the flow equations for a following rotor row, and the section on the definition of blade shapes has been extended to include the parabolic arc camber line blade. A list of symbols used in the text has been added. Each chapter contains a selection of useful problems and answers are provided at the end of the book. SI/Metric units are used throughout