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Wednesday, May 6, 2020 | History

2 edition of Analytic investigation of effect of end-wall contouring on stator performance found in the catalog.

Analytic investigation of effect of end-wall contouring on stator performance

Robert J Boyle

Analytic investigation of effect of end-wall contouring on stator performance

by Robert J Boyle

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  • 2 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Compressors -- Blades,
  • Turbomachines,
  • Impellers

  • Edition Notes

    StatementRobert J. Boyle, Harold E. Rholik, and Louis J. Goldman
    SeriesNASA technical paper -- 1943
    ContributionsRholik, Harold E, Goldman, Louis J, Lewis Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    Pagination9 p. :
    ID Numbers
    Open LibraryOL14933056M

      Effect of the end-wall vortex generator jets on the performance of a high subsonic compressor cascade Cong Chen, Huaping Liu, and Fu Chen Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 3, Author: Cong Chen, Huaping Liu, Fu Chen. Effect of Manufacturing on Stator Core Losses Deepak Singh, Anouar Belahcen and Antero Arkkio Aalto University (Finland) @ Abstract —Manufacturing processes like cutting, pressing, welding and casing, during the production of cores, significantly increases the core losses of an electrical machine. A modifiedFile Size: KB.

    by analytical techniques. The Virtual Work (VM) method is combined with Finite Element Analysis to evaluate the cogging torque and to show that the T-shaped bifurcation method is very efiective in cogging torque minimization. The analytical and CAD simulated results are compared for cogging torque reduction in T-shape bifurcation in stator Size: KB.   Analysis of the proximity and skin effects on copper loss in a stator core Analysis of the proximity and skin effects on copper loss in a stator core Młot, Adrian; Korkosz, Mariusz; Grodzki, Piotr; Łukaniszyn, Marian Accurate prediction of power loss distribution within an electrical device is highly desirable as it allows thermal behavior to be evaluated at the early.

    The contouring consists of a pronounced hill on the pressure side of the passage next to a trough at the suction side, near the blade leading edge axial location. As shown, most of the contouring is located upstream of the leading edge until reaching 50% of the axial chord. The rotor blades have a Author: Dominic D. Hänni, Rainer Schädler, Reza S. Abhari, Anestis I. Kalfas, Gregor Schmid, Ewald Lutum, Ni. performance of the engine. In this paper, experimental and numerical investigations present the effects of secondary air removal on low speed compressor cascade flow. The bleed off -take of this study represents a circumferential casing slot design downstream of the stator representative for a modern high -pressure compressor.


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Analytic investigation of effect of end-wall contouring on stator performance by Robert J Boyle Download PDF EPUB FB2

Analytic investigation of effect of end-wall contouring on stator performance. Washington, D.C.: National Aeronautics and Space Administration, Scientific and. Calculations show improved stator performance when the tip end wall was contoured so that the inlet area was greater than the exit area.

Comparisons are made with previously published experimental data. The results of a parametric analysis of the effect contour geometry on the efficiency of a highly loaded axial stator are : R.

Boyle, H. Rholik and L. Goldman. Analytic investigation of effect of end-wall contouring on stator performance / By Robert J. Boyle, Louis J. Goldman, Harold E. Rholik and Lewis Research Center.

Abstract "November " category "Lewis Research Center."Includes bibiliographical of access:. Request PDF | Investigation of Effect of End Wall Contouring Methods on a Transonic Turbine Blade Passage | End wall contouring has been widely studied during past two decades for secondary loss.

This numerical study uses a two-stage low speed research compressor with a shrouded stator row to investigate the interaction of non-axisymmetric endwall contouring at the stator hub with the leakage flow emanating from the shroud by: 5.

At the same time, it is well known that end wall contouring is an effective method for reducing the secondary flow loss. In the literature, both “axisymmetric” and “nonaxisymmetric” end wall geometries have been suggested. Almost all of these geometric variations have been based on the expertise of the turbine by:   This paper investigates the influence of the end effect on the back-emf wave forms of flux-switching and doubly salient permanent magnet brushless machines, in which the magnets are located on the stator.

Their electromagnetic performance is predicted from two-dimensional and three-dimensional finite element analyses and validated by: With reduced turbo lag and better transient response, the introduction of VTG stator guide vanes improved turbocharger performance at all the engine operating conditions.

e VTG system accelerates and maneuvers exhaust gas ow to the turbine. Favorable ow conditions at turbine inlet created by vane shape improve turbine performance. FEM Analysis for Comparative Investigation of The Stator Circuit Connexion Impact on The Induction Motor Broken Bar Fault Higher Order Signatures Noura Halem1,2, Salah Eddine Zouzou2, Kamel Srairi3, and Konstantinos N.

Gyftakis4 1Faculty of Technology, University of Author: Noura Halem, Salah Eddine Zouzou, Kamel Srairi, Konstantinos Gyftakis. Effect of slot openings Tesla Fundamental Component (torque producing term) 0 25 50 0 Figure 2.

Air-gap °ux density waveform and harmonic spectrum from the DW stator. where Bs is the °ux density produced by the stator current, Arot the airgap of surface area, Rair the air-gap reluctance, and N the number of turns per stator coil. Numerical investigation of the influence of non-axisymmetric hub contouring on the performance of a shrouded axial compressor stator.

A further insight into the effects of contouring the stator casing wall on the passage flow is provided by Fig. This figure compares the contours of normalized axial vorticity ω ¯ x = ω x U u p s-1 c with axisymmetric and with contoured casings, mm downstream of the first stator exit by: 2.

Lewis Research Center: Analytic investigation of effect of end-wall contouring on stator performance / (Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch.

1 2-D Analytical Investigation of the Parameters and the Effects of Magnetization Patterns on the Performance of Coaxial Magnetic Gears A. Rahideh *1, A.A. Vahaj2, M. Mardaneh3, T. Lubin4 1 Department of Electrical and Electronics Engineering, Shiraz University of Cited by: The favorable effect of non-axisymmetric endwall contouring was confirmed by Atkins, Harvey et al., and Hartland et al.

Praisner et al. and Knezevici et al. investigated a series of blade airfoil and non-axisymmetric endwall contouring designs and proposed that non-axisymmetric endwall contouring is an effective method to reduce secondary by: 9. The present study is intended to investigate numerically the effect of fillet and axisymmetric endwall shapes on loss reduction in a highly loaded low aspect ratio transonic turbine stage.

The fillets and endwall contouring shapes are applied over nozzle guide vanes. The aerodynamic performance of two contoured endwallsFile Size: KB.

The investigation of the clocking effect mainly concentrates on turbines and compressors, but seldom in centrifugal pumps. In this paper, using numerical simulation and experiment, the influence of the clocking effect on the hydraulic performance of centrifugal pump with guide vane is studied.

Numerical simulations with SST k-w turbulence model were applied to obtain the inner flow field of Author: Jiang Wei, Chen Diyi, Yuchuan Wang, Li Ting. Effects of Tip Endwall Contouring on the Three-Dimensional Flow Field in an Annular Turbine Nozzle Guice Vane: Part 1—Experimental Investigation ASME J.

Eng. Gas Turbines Power Cited by: CFD ANALYSIS TO INVESTIGATE THE EFFECT OF LEANED ROTOR ON THE PERFORMANCE OF TRANSONIC AXIAL FLOW COMPRESSOR STAGE the tip and end-wall, where the tip gap tends to develop intense secondary flows. The pressure difference Based on the steady state numerical analysis investigation.

T1 - Effect of incoming wakes on the stator performance in a Singlestage low speed axial flow compressor operating at design and near stall conditions. AU - Pallot, Guillaume. AU - Kato, Dai. AU - Kanameda, Wataru. AU - Ota, Yutaka.

PY - Y1 - N2 - Unsteady flow phenomena can significantly influence the performance of : Guillaume Pallot, Dai Kato, Wataru Kanameda, Yutaka Ohta. Numerical analysis on effects of inlet pressure and temperature non-uniformities on aero-thermal performance of a HP turbine International Journal of Heat and Mass Transfer, Vol.

Turbine Blade Row Optimization Through Endwall Contouring by an Adjoint MethodCited by: Non-axisymmetric endwall contouring techniques have been widely applied in gas turbines; numerous papers and experimental studies have shown that it can significantly improve the overall performanc.A detailed numerical analysis of secondary flows in a transonic turbine is presented in this paper.

The turbine stage is optimized by mitigating secondary flow through the method of non-axisymmetric endwall design. An automated optimization platform of NUMECA/Design3D was coupled with Euranus as a flow solver for the numerical investigation.

The contoured endwalls of the stator and the rotor Cited by: 1.