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Monday, May 4, 2020 | History

1 edition of The analytical treatment of secondary flows and associated losses in axial-flow turbomachines found in the catalog.

The analytical treatment of secondary flows and associated losses in axial-flow turbomachines

James Raney Woods

The analytical treatment of secondary flows and associated losses in axial-flow turbomachines

by James Raney Woods

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  • 1 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Fluid dynamics,
  • Turbomachines

  • About the Edition

    The report presents the current state of the art of the analytical treatment of secondary flows and associated losses in axial-flow turbomachines. A physical description of the secondary-flow phenomena is given, as well as the theoretical methods that are available to treat secondary flows and to predict secondary losses.

    Edition Notes

    Statementby J.R. Woods
    ContributionsNaval Postgraduate School (U.S.)
    The Physical Object
    Pagination38 p. :
    Number of Pages38
    ID Numbers
    Open LibraryOL25521313M
    OCLC/WorldCa434880231

    J., CHAUVIN -VKI: A note on some turbine secondary flow aspects C.H., SIEVERDING -VKI: Reduction of secondary losses in turbines K.D., PAPAILIOU -ECOLE CENTRALE DE LYON, FRANCE: Secondary flows in axial compressors. 6- Axial Flow Gas Turbines 7- Steam Turbines 8- Axial Flow Compressors 9- Radial Flow Turbines Other Rotodynamic Machines. UCourse Description U: Mechanical engineering students can take a course on turbomachines near the end of the BSc program. It is wise to take this course, because turbomachines are fantastic show rooms for.

    Author: F. A. E. Breugelmans ISBN: UCSD Genre: Turbomachines File Size: MB Format: PDF, ePub, Mobi Download: Read: Active and passive flow control techniques are being extensively investigated in the primary components of turbomachinery. However to further improve the performance of turbomachinery, active and passive flow control techniques need to be applied to secondary components of turbomachines, such as : N. Sitaram, K. Funazaki, Seyed G. Saddoughi.

    Incompressible Flow treated like an understandable subject and the turbo equipment that works with it also, not only pumps, but some other types of equipment. Very good info for those who want to dig and learn the beauties of the Incompressible world!! Forgot saying I did received the book on time and in top shape condition, KEEP AT IT LADS!5/5(1). The stator-rotor interaction is an important issue in turbomachinery design when the highest performances are targeted. Different characters mark the interaction process in high-pressure or low-pressure turbines depending both on the blade height and on the Reynolds number. For small blade heights, being the stator secondary flows more important, a more complex interaction Author: Paolo Gaetani.


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The analytical treatment of secondary flows and associated losses in axial-flow turbomachines by James Raney Woods Download PDF EPUB FB2

The analytical treatment of secondary flows and associated losses in axial-flow turbomachines by Woods, James : The object of this report is to present the current state of the art of the analytical treatment of secondary flows and associated losses in axial-flow turbomachines. To that end a physical description of the secondary -flow phenomena is given, as well as the theoretical methods that are available to treat secondary flows and to predict secondary losses.

The mainstream secondary flow appears to Review: Secondary flows and losses in cascades and axial-flow turbomachines be small for most practical turbomaehines.

If CLCL, is not small, the losses due to main- stream secondary flow may be calculated reasonably accurately from von Karman'siv equations, otherwise the analysis suggested by Smith, L Cited by: Therefore the 8panwise distribution of the secondary flow loss may be approximately represented by a parabolic function as AXIAL FLOW TURBOMACHINERY Ws(r) = a (r - rm)2 (7) The coefficient a in the equation(7) is determined by putting the mass averaged secondary flow loss coefficient of equation(7) to be equal to that from the secondary flow loss correlation of Vavra Cited by: 4.

To reduce the tonal noise of axial fans loudspeakers are typically used to generate the required anti-phase sound field. The space requirement and the weight of the loudspeakers inhibit practical application of this method.

In the present study the secondary sound field is generated by injecting high speed air jets into the rotor blade tip by: 5. Aero-thermodynamics and flow in turbomachines. Michael H. Vavra From inside the book.

What people are saying - Write a review. We haven't found any reviews in the usual places. absolute flow adiabatic process annulus arbitrary assumed axial flow axial velocity components axis blade angles blade force blade surface calculations channel.

Secondary flows are undesirable in centrifugal compressors as they are a direct cause for flow (head) losses, create nonuniform meridional flow profiles, potentially induce flow separation/stall, and contribute to impeller flow slip; that is, secondary flows negatively affect the compressor performance.

Stator Effect on Head Characteristics. (steepens H-Q curve) • reduce impeller inlet Cu at low flow • increase impeller inlet Cu at high flow • provide stability over wide operating range • increase stator and impeller incidence angle at off design • reduces inception of stall with negative incidence.

• Due to the inner losses, the total energy exchange between the rotor and the flow medium is altered. • In the case of the working machine more energy has to be exchdhanged.

• In the case of the power machine less energy is exchanged than by a machine under the same condition but without losses. Introduction: Dimensional Analysis: Similitude.

If you have known one you have known all.(TERENCE, Phormio.) Definition of a turbomachine. We classify as turbomachines all those devices in which energy is transferred either to, or from, a continuously flowing fluid by the dynamic action of one or more moving blade rows.

Performance Prediction of Axial Flow Turbomachines Using a Modified One Abstract— A computer code is presented for off-design performance prediction of axial-flow compressors and fans. Stage and compressor this type of flow analysis is a gross simplification of a complex three-dimensional system, which can now be modeled more File Size: 1MB.

Title: Unified Treatment of Flow Instabilities of Turbomachines Author: Yoshinobu Tsujimoto Subject: Journal of Propulsion and Power Created Date. Losses not included (may be mitigated in the future) Parasitic losses, leakage flows Losses due to three-dimensional effects Shock losses David K. Hall (MIT Gas Turbine Lab) Performance Limits of Turbomachines Research Exam 1/26/10 11 / 19File Size: KB.

Turbomachine Sealing and Secondary Flows, Part 2: Review of Rotordynamics Issues in Inherently Unsteady Flow Systems With Small Clearances [R. Hendricks, NASA Technical Reports Server (NTRS), et al.] on *FREE* shipping on qualifying offers.

Today's computational methods enable the determination of forces in complex systems, but without Cited by: 9. An Improved Mixing-Plane Method for Analyzing Steady Flow Through Multiple-Blade-Row Turbomachines Ding Xi Wang. Ding Xi Wang. Siemens Industrial Turbomachinery Ltd., Waterside South, Secondary Flows and Loss Caused by Blade Row Interaction in Cited by: 5.

axial flow fan; a performance analysis of it has been performed. The main scope Present work deals with axial flow fan of type power absorbing turbomachines. The flow in the investigated form, i.e., air, is characterised by Mach numbers below the Design and Analysis of an Axial Fan used in Kiln Shell Cooling Three-dimension losses and correlation in turbomachinery refers to the measurement of flow-fields in three dimensions, where measuring the loss of smoothness of flow, and resulting inefficiencies, becomes difficult, unlike two-dimensional losses where mathematical complexity is substantially less.

Three-dimensionality takes into account large pressure gradients in every. Axial flow turbomachines - When the path of the through-flow is wholly or mainly parallel to the axis of rotation, the device is termed an axial flow turbomachine. The radial component of the fluid velocity is negligible.

Since there is no change in the direction of the fluid, several axial stages can be used to increase power output. A comparison of the performance of three model axial’ flow turbines tested under both steady and pulse flow conditions, Proc.

Inst. Mech. Engrs. Pt.1 (/70) Google Scholar H. Craig and M. Janota, The potential of turbochargers as applied to highly rated 2-stroke and 4-stroke engines, Proc. CIMAC, paper B. 14 ( Cited by: 1. classification of turbo machines turbomachines vtu Axial Turbomachines Radial turbomachines Mixed turbomachines Dimensional analysis fundamental quantities and secondary quantities Methods of.

Hydraulic and compressible flow turbomachines. axial flow compressor axial flow pump axial velocity blade angle blade passages blade speed calculated cascade cavitation cent reaction centrifugal compressor centrifugal pump constant curve diffuser vanes dimensionless specific speed draft tube drag coefficient enthalpy Exercise exit Figure Reviews: 1.An approach to endwall contouring has been developed with the goal of reducing secondary losses in highly loaded axial flow turbines.

The present paper describes an experimental assessment of the performance of the contouring approach implemented in a low-speed linear cascade test by: The 3-D flow fields in outlet pipe of an axial-flow pump were measured with 5-hole probe. The flow regularity was disclosed and the formation mechanism was analyzed.