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Sunday, July 26, 2020 | History

4 edition of Unsteady blade row interaction in a transonic turbine found in the catalog.

Unsteady blade row interaction in a transonic turbine

Unsteady blade row interaction in a transonic turbine

final report, NASA grant NAG3-1671

  • 53 Want to read
  • 13 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Engine tests,
  • Supersonic turbines,
  • Jet engines,
  • Unsteady flow,
  • Turbomachinery,
  • Three dimensional flow

  • Edition Notes

    StatementDaniel J. Dorney.
    Series[NASA contractor report] -- 206021., NASA contractor report -- NASA CR-206021.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17837381M
    OCLC/WorldCa40115463

    So far, there are only a few published literatures about the unsteady interaction between tip leakage flow and adjacent blade rows in axial turbine. Behr et al. [5] indicated that the pressure field of the second stator has an influence on the development of the tip leakage vortex of the by: 4. UNSTEADY FLOW: ITS ROLE IN THE LOW PRESSURE TURBINE HP Hodson and RJ Howell Whittle Laboratory, University of Cambridge, Department of Engineering, Madingley Road, Cambridge, CB3 0DY, UK 1 Abstract In aircraft engines, chord-based Reynolds numbers of the order of x are found in the low pressure Size: KB.

    Unsteady Transonic Wind Tunnel. The transonic wind tunnel is a blowdown facility with a cross section of 6” wide by 22” high (x m) and a test section length of 44” (m), with optical access from the top and both sides. DRAFT: UNSTEADY ADJOINT OF PRESSURE LOSS FOR A FUNDAMENTAL TRANSONIC TURBINE VANE Chaitanya Talnikar, Qiqi Wang Aerospace Computational Design Lab Department of Aerospace and Astrophysics Massachusetts Institute of Technology Cambridge, Massachusetts [email protected], [email protected] Gregory M. Laskowski Engineering Technologies GE Aviation.

      For efficient and accurate unsteady flow analysis of blade row interactions, a Space-Time Gradient (STG) method has been proposed. The development is aimed at maintaining as many modelling fidelities (the interface treatment in particular) of a direct unsteady method as possible while still having a significant speed-up. The results of a numerical simulation of the flow in a transonic turbine stage with a pitch ratio of are presented. The time-averaged solution is compared to experimental data and satisfactory agreement is stated. Complex 3D-unsteady flow phenomena (shock motion, vortex shedding) are observed.


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Unsteady blade row interaction in a transonic turbine Download PDF EPUB FB2

Unsteady Blade Row Interaction m a Transonic Turbine Final Report 15 July Experimental data from jet-engine tests have indicated that unsteady blade row inter- The magnitude of blade row interaction is a function of both blade-count ratio and axial spacing. In the current research program, numerical simulations have been used to.

Blade Count and Clocking Effects on Three-Bladerow Interaction in a Transonic Turbine H. School of Engineering, University of Durham, South Road, Durham DH1 3LE, UK Unsteady Blade Row Interactions in a Multi-stage Compressor,” Time-Resolved Vane-Rotor-Vane Interaction in A Transonic One and A Half Stage Turbine,”Cited by: Get this from a library.

Unsteady blade row interaction in a transonic turbine: final report, NASA grant NAG [Daniel J Dorney; United States. National Aeronautics and Space Administration.]. The paper focuses on the unsteady pressure field measured around the rotor midspan profile of the VKI Brite transonic turbine stage.

The understanding Unsteady blade row interaction in a transonic turbine book the complex unsteady flow field is supported by a quasi-three-dimensional unsteady Navier–Stokes computation using a k-ω turbulence model and a modified version of the Abu-Ghannam and Shaw correlation for the onset of by: Request PDF | Accounting For Unsteady Interaction in Transonic Stages | This paper discusses the importance of the unsteady interaction in transonic turbomachinery stages.

Although the flow in a. A Numerical Modelling of Stator-Rotor Interaction in a Turbine Stage With Oscillating Blades. Investigation of unsteady flow through transonic turbine stage. the related blade-row. A literature review of unsteady stator-rotor interaction can be found in a previous study by Shyam (Ref.

a transonic turbine blade tip (Rolls Royce Environmentally Analysis of Unsteady Tip and Endwall Heat Transfer in a Highly Loaded Transonic TurbineFile Size: 1MB.

The influence of inlet hot streak temperature distortion on turbine blade heat load was explored on a transonic axial flow turbine stage test article using a three-dimensional, multiblade row unsteady Euler code.

The turbine geometry was the same as that used for. downstream transition duct and low-pressure turbine first vane that lead to the unsteady surface pressure on the high-pressure turbine blade. Finally, the computed time-average relative total pressure loss for each blade-row is compared with that from a steady, multi-stage analysis to quantify the unsteady effects on aerodynamic performance.

@article{osti_, title = {Predictions of three-dimensional steady and unsteady inviscid transonic stator/rotor interaction with inlet radial temperature nonuniformity}, author = {Saxer, A P and Giles, M B}, abstractNote = {Numerical predictions of three-dimensional inviscid, transonic steady and periodic unsteady flow within an axial turbine stage are analyzed in this paper.

stator/rotor interaction in a highly loaded transonic first tur-bine stage. An interesting feature in this highly unsteady flow is the oblique shock wave, which extends from the trailing edge of the stator.

This shock impinges on the rotor blade, reflects upstream, and then reflects again off the stator blade. Simulation of unsteady blade row interaction with CFD: background / W.N. Dawes --Turbulence modelling for physically complex flows pertinent to turbomachine aerodynamics / M.A.

Leschziner --Experimental investigation of the unsteady rotor aerodynamics and heat transfer of a transonic turbine stage / C.H. Sieverding, R. Denos, T. Arts, J.-R. What is an unsteady flow. Examples of alliteration in the book hatchet.

How did the Mediterranean climate influence culture in the region. Authors, Poets, and Playwrights. Rotating Blade Row Oscillating Airfoil Aerodynamics. 67 K. Frey, S. Fleeter Experimental Investigation of Unsteady Aerodynamic Characteristics of. 83 Transonic Compressor Cascades (Development of Test Facilities) I.

Fujimoto, T. Hirano, H. Tanaka. Investigation of Vortex Shedding and Wake-Wake Interaction in a Transonic Turbine Stage Using Laser-Doppler-Velocimetry and Particle-Image-Velocimetry A Review of the Research on Unsteady Turbine Blade Wake Characteristics Secondary Flows and Loss Caused by Blade Row Interaction in a Turbine Stage.

Turbomach (July, )Cited by: the unsteady flow through an annular turbine cascade, the transonic Standard Test Case 4, Test Computations are performed on a two- and three-dimensional model of the blade row with either the Euler or the Navier-Stokes flow models.

Results are compared to the experimental measurements. Comparisons of the unsteady surface pressure and the. Unsteady Aerodynamics and Blade-Row Interactions in the Embedded Stage of an Axial Compressor.

Douglas Ryan Matthews, Purdue University. Abstract. In a mature engineering field like compressor aerodynamics, the most accessible advances in machine technology, translating to performance and efficiency, have been discovered and have found industry design by: 1.

Ou, S., Han, J.C.: Unsteady wake effect on film effectiveness and heat transfer coeffiecient from a turbine blade with one row of air and Co \(_2\) film injection. by: 3. a turbine stage that have an arbitrary number of vanes and blades for each nozzle and rotor. It is clear that this flow has a three dimensional aspects, in spite of the high hub/tip ratio which has theoretically a two-dimensional flow aspects.

Keywords: 3-D unsteady inviscid. The current paper presents experimental clocking investigations of the flow field in midspan in a high-pressure transonic turbine with a downstream vane row ( stage machine). Laser-Doppler-velocimetry measurements were carried out in order to record rotor phase resolved velocity, flow angle, and turbulence distributions upstream and Cited by:.

An experimental and numerical study of tip leakage flow control in axial turbine was performed by means of unsteady periodic wakes of upstream blade row. The flow field was investigated respectively in linear turbine cascade and turbine rotor.

Focus was placed on the analysis of unsteady interaction mechanism between upstream periodic.In compressor working, unsteady aerodynamic load induced by the interaction of stator-rotor blade rows is the main vibration source of blade high cycle fatigue. It has a direct influence on fatigue strength of compressor blades.

Further research on unsteady aerodynamic load has very important significance for improving the service life and reliability of compressor by: 1. Forced response analysis of a rocket engine turbine blade was conducted by a decoupled fluid-structure interaction procedure.

Aerodynamic forces on the rotor blade were obtained using 3D unsteady flow simulations. The resulting aerodynamic forces were interpolated to the finite element (FE) model through surface effect elements prior to conducting forced response by: 2.