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Friday, August 7, 2020 | History

3 edition of Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries found in the catalog.

Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries

Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries

progress report 2

  • 298 Want to read
  • 5 Currently reading

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

    Subjects:
  • Parallel processing (Computers),
  • Viscous flow.,
  • Three dimensional flow.,
  • Turbine pumps.,
  • Navier-Stokes equation.,
  • Unsteady flow.,
  • Computational fluid dynamics.

  • Edition Notes

    Other titlesRapid prediction of unsteady three dimensional viscous flows in turbopump geometries.
    StatementDaniel J. Dorney.
    Series[NASA contractor report] -- NASA-CR-1998-206723., NASA contractor report -- NASA CR-206723.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15541163M

    H.T.C. is three-dimensional, turbulent, viscous, complex, highly unsteady and difficult to analize because of the operating conditions that consist of three elements rotating at different velocities. The two principal unsteady problems concern the ex-ternally forced unsteadiness like the blade-row interaction,Cited by: 6. Furukawa M, Saiki K, Inoue M. Numerical simulation of three-dimensional viscous flow in diagonal flow impeller. Paper presented at Proceedings of the ASME/JSME Fluids Engineering and Laser Anemometry Conference and Exhibition, Hilton Head, SC, USA,.Cited by: 5.

    this paper. The simulations are conducted as three-dimensional initial value problems, with the volume-of-fluid scheme. 11, The experimental work of Ref. 5 focuses on a viscous drop suspended in a second immiscible liquid ~the matrix liquid! in a cylindrical Couette device. The difference in den-. 3D flow structures numerically for two dimensional curvilinear viscoelastic flows. In summary, many simulations have been limited to 2D viscoelastic flows, although three dimensional flow structures for viscoelastic fluids are very different and more unstable compared to its 3D Newtonian fluid counterpart []. Importantly, in 2D simulations theCited by:

    Two- and three-dimensional unsteady melt-flow simulation in Czochralski crystal growth Collaborator: E. Bänsch, D. Davis, H. Langmach, G. Reinhardt, N. Scurtu, M. Uhle Cooperation with: K. Böttcher, W. Miller, U. Rehse (Institut für Kristallzüchtung (IKZ), Berlin) Description: Semiconductor single crystals and their properties are of central importance in the fields of computer technology.   A numerical scheme was developed to solve the unsteady three-dimensional (3D) Navier–Stokes equations and the fully nonlinear free surface boundary conditions for simulating a 3D numerical viscous wave tank.


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Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries Download PDF EPUB FB2

Get this from a library. Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries: progress report 2. [Daniel J Dorney; United States. National Aeronautics and. Get this from a library.

Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries: final report-year 1. [Daniel J Dorney; United States. National Aeronautics and. How do you get a critical appreciation of 'The night train at Deoli' by Ruskin Bond.

What is the answers to module 18 foolproof. What is the bond angle of TeF6. three dimensions. Complex geometries, endwall bound- ary layers, tip clearance effects, etc. also lead to three- dimensional flows in turbomachinery.

It is the goal of the present work to begin to predict some of these three- dimensional viscous effects. Several steady three-dimensional analyses for tur- bomachinery have been published by: Simulations of the Unsteady Flow Through the Fastrac Supersonic Turbine Lisa W.

Griffin. “Rapid Prediction of Unsteady Three-Dimensional Viscous Flows in Turbopump Geometries,” NASA HD Final Report, Mar. Dorney, D. J., by: Computation of 3-D unsteady laminar viscous flow over a prolate spheroid at incidence by a collocated finite difference method G.

Deng, E. Guilmineau, P. Queutey, M. Visonneau Pages Arnal M., Lauer O., Lilek Ž., Perić M. () Prediction of Three-Dimensional Unsteady Lid-Driven Cavity Flow. In: Deville M., Lê TH., Morchoisne Y.

(eds) Numerical Simulation of 3-D Incompressible Unsteady Viscous Laminar Flows. Notes on Numerical Fluid Mechanics (NNFM), vol Cited by: 9. Parallel computation of unsteady three-dimensional incompressible viscous flow using an unstructured multigrid method Chin Hoe Tai ^'^, Yong Zhao ^, K.M.

Liew ^'^'* ^ Nanyang Centre for Supercomputing and Visualisation, Nanyang Technological University, Nanyang Avenue, Singapore ^ School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue Author: Chin Hoe Tai, Yong Zhao, K.M.

Liew. COMPUTATION OF INCOMPRESSIBLE VISCOUS FLOWS THROUGH TURBOPUMP COMPONENTS IRl1UAL Cetin Kiris,* Dochan Kwak, and Stuart Rogers COLOR •., Ames Research Center SUMMARY A finite-difference, three-dimensional, incompressible Navier-Stokes formulation for calculating the flow through turbopump components is presented.

The solution. For turbulent flows, the solver is applied for both Unsteady-Reynolds-Averaging-Navier-Stokes and Large-Eddy-Simulation computations.

The solver is demonstrated to be capable of solving problems with realistic geometries. Preliminary results for 3D lifting flow are also : Yang Chen. BIFURCATION STUDIES OF TWO-DIMENSIONAL FLOWS 0 1 FIG. Spectral element mesh for the eddy-promoter geometry.

The domain is composed of 88 spectral elements, each with 9 9 collocation points. The flow is driven via a body force f =(2 ;0) from left to right, and periodic boundary conditions are imposed in the streamwise direction.

The three-dimensional Navier–Stokes (NS) equations for incompressible unsteady flows, modified by the ACM, can be re-written in vector form with dimensionless parameters: (1) C ∂ W ∂ τ + K ∂ W ∂ t + ∇ F → c = ∇ F → v where W = p u v w, F → c = U u U + p δ ij v U + p δ ij w U + p δ ij, F → v = 0 1 Re ∇ u Cited by: Optimum Shape Design for Unsteady Three-Dimensional Viscous Flows Using a Nonlinear Frequency-Domain Method Siva K.

Nadarajah∗ McGill University, Montreal, Quebec H3A 2S6, Canada and Antony Jameson† Stanford University, Stanford, California DOI: / Numerical simulation of 2D and 3D inducer geometries Article in International Journal for Numerical Methods in Fluids 48(2) - May with 49 Reads How we measure 'reads'.

Features of three-dimensional unsteady viscous flow past finite cylinders, such as the pyramidal wake and the three-dimensional von Karmen vortex street, are successfully simulated. Transition to turbulence in plane channel flow occurs even for conditions under which modes of the linearized dynamical system associated with the flow are stable.

In this paper an attempt is made to understand this phenomena by finding the linear three‐dimensional perturbations that gain the most energy in a given time period. A complete set of perturbations, ordered by energy growth, is Cited by: Unfortunately, this book can't be printed from the OpenBook.

Visit to get more information about this book, to buy it in print, or to download it as a free PDF. nature of each unsteady solution necessitates massive parallelism to reduce overall cycle times. The goal of this paper is to present an e cient parallel scalable framework for computing adjoint-based gradients in large-scale three-dimensional unsteady ow problems and to apply these gradients to design optimization in realistic scenarios.

Numerical solution of 2D and 3D viscous incompressible steady and unsteady flows using artificial compressibility method. Louda. artificial compressibility method is used to solve steady and unsteady flows of viscous incompressible fluid.

On numerical simulation of three-dimensional flow problems by finite element and finite volume. A new three-dimensional boundary integral algorithm is presented that is capable of simulating the process of drop breakup in viscous flows. The surface discretization is fully adaptive, thus providing accurate resolution of the highly deformed drop shapes that are characteristic of breakup by:.

The current work focuses on the development and application of a new finite volume immersed boundary method (IBM) to simulate three-dimensional fluid flows and heat transfer around complex geometries.

First, the discretization of the governing equations based on the second-order finite volume method on Cartesian, structured, staggered grid is outlined, followed by the description of Cited by: 1.Three-dimensional optimal perturbations in viscous shear flow Landahl” has shown that inviscid shear flows support three-dimensional disturbances whose energy grows at Phys.

Fluids A 4 (8), August /92/ l 4$ @ American Institute of Physics Three-dimensional optimal perturbations in viscous shear.This work presents a three-dimensional two-way coupled method to simulate moving solids in viscous free-surface flows. The fluid flows are solved by weakly compressible smoothed particle hydrodynamics (SPH) and the displacement and rotation of the solids are calculated using the multisphere discrete element method (DEM) allowing for the contact mechanics theories to be used in arbitrarily Cited by: 3.