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Monday, April 27, 2020 | History

3 edition of Confined turbulent swirling recirculating flow predictions found in the catalog.

Confined turbulent swirling recirculating flow predictions

Confined turbulent swirling recirculating flow predictions

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  • 30 Currently reading

Published by National Aeronautics and Space Administration in [Washington, D.C.? .
Written in English

  • Turbulence,
  • Aerodynamics

  • Edition Notes

    Statementby Muftah Taher Abujelala
    SeriesNASA-CR -- 175397, NASA contractor report -- 175397
    ContributionsUnited States. National Aeronautics and Space Administration, Oklahoma State University
    The Physical Object
    Pagination1 v.
    ID Numbers
    Open LibraryOL14929695M

    Database of Near-Wall Turbulent Flow Properties of a Jet Impinging on a Solid Surface under Different Inclination Angles. In: Fluids, 3 (1), MDPI, S. 5, ISSN , 13th Workshop on Two-Phase Flow Predictions, Halle (Saale), Germany, [Conference item] Mixing Analysis of a Swirling Recirculating Flow Using DNS and Experimental Data. The radius of the recirculating cell R c is defined here by one requirement only, that of no net vertical flow in the environment; in reality R c is a function of the aspect ratio of the environment (height/radius H/R cyl), as well as dP/dz and the properties of the fluids, but this function cannot be specified by a simple one-dimensional Cited by: If such a flow is retarded, the near-wall. fluid may have insufficient momentum to continue its motion and will be brought to rest at the point of separation. Fluid particles behind this point move in a direction opposite to the external stream and the original boundary-layer fluid passes over a . Gan, L and Baqui, YB and Davidson, PA and Krogstad, P and Dawson, JR () Experimental investigation of large-scale non-decaying rotating turbulence. In: UNSPECIFIED. García-Mayoral, R and Pierce, B and Wallace, J () Off-wall boundary conditions for bounded turbulent flow simulations. In: UNSPECIFIED. Lyu, B and Ayton, LJ () Rapid noise prediction models for serrated leading.

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Confined turbulent swirling recirculating flow predictions Download PDF EPUB FB2

Get this from a library. Confined turbulent swirling recirculating flow predictions. [Muftah Taher Abujelala; United States. National Aeronautics and Space Administration.; Oklahoma State University.].

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The swirling confined flow in LPP-type geometries is clearly extremely complex and successful design of such systems will almost certainly require the detailed understanding of the time-resolved flow which can only be provided via LES methods.

CONCLUSION. The paper has presented the analysis of a highly swirling confined flow using LES by: 8. Water at constant and uniform velocities of 1,2 and m/s (corresponding Reynolds number of,and respectively) were set on the inlet, which is at 5D in upstream.

Coarse-grid predictions of the steady turbulent flow in a right-angled tee-junction are presented, attention being confined to the cylindrical “horizontal” portion of the tee.

swirling, recirculating, turbulent flows inside can combustors. The present model is restricted to single-phase, diffusion-controlled combustion, with negligible.

Confined 'Turbulent Swirling Recirculating Flow Predictions ^f ^I i I i; (NASA-CR) CONFINED TURBULENT SWIRLING RECIRCULATING FLOW PRED`2CTIONS Ph.D. Thesis. Final Report (Oklahoma State.

Univ.) p NC /NF AU1 CSCL Unclas G3/07 M.T. Abujelala and D.G. Lilley Oklahoma State University Stillwater, Oklahoma May The measurements obtained provide a data base with which the predictions of turbulence models in a recirculating swirling flowfield can be evaluated.

Discover the world's research 17+ million members. “The Influence of Slot Geometry on the Two Dimensional Turbulent Wall-Jet”, Ph. Thesis (London University ) Google Scholar 7. Matthews, L., and Whitelaw, J. H., “Plane jet flow over a backward facing step”, Proc.

Inst. Mech. Eng. London38 () Google ScholarCited by: Predicting detailed flow properties of a confined, isothermal, and swirling flow field in an axisymmetric sudden expansion combustor is of great importance. In this regard, the current paper makes use of Artificial Neural Networks to enhance the experimental results obtained using a two-component laser Doppler velocimetry capable of measuring the mean velocity components and their statistics.

BEL HASSAN M. and SIMONIN, O. Second-moment predictions of confined turbulent swirling flow. Proc. 5th Int. Symp. on Refined Flow Modelling and Turbulence Measurements, Viollet PL. Ecole Nationale des Ponts et Chaussées, Paris (to appear).

Google ScholarCited by: 2. Confined Turbulent Swirling Recirculating Flow Predictions. Ph.D. Thesis. NASA Technical Reports Server (NTRS) Abujelala, M.

Turbulent swirling flow, the STARPIC computer code, turbulence modeling of turbulent flows, the k-xi turbulence model and extensions, turbulence parameters deduction from swirling confined flow measurements, extension of the k-xi to confined.

Three-dimensional Turbulent Swirling Flow Reconstruction Using Artificial Neural Networks Saad Ahmed*, Hany El Kadi, Amin AlSharif Mechanical Engineering Department, American University of Sharjah, Sharjah, P.O.

BoxUAE. Abstract. Predicting detailed flow properties of a confined, isothermal, and swirling flow field in an axisymmetric. A modified low-Reynolds-number k-ε turbulence model is developed in this work. The performance of the proposed model is assessed through testing with fully developed pipe flows and recirculating flow in pipe expansion.

Attention is specifically focused on the flow region around the reattachment by: Book of Abstracts of the “Thirty-First International Symposium on Combustion, AugustHeidelberg, Germany” (), "RANS Predictions of Turbulent Flow Past a Circular Cylinder over the Critical Regime", "DES Analysis of Confined Turbulent Swirling Flows in Sub-Critical Regime", S.

Peng and W. Haase (Eds.), Advances. Assessment of the SSG Pressure-Strain Model in Free Turbulent Jets With and Without Swirl B.

Younis, S., Launder, B. E., and Leschziner, M.“Modeling Strongly Swirling Recirculating Jet Flow with Reynolds-Stress Transport Closure,” Proc. 6 th Symposium on Turbulent Shear Flows, Cited by: @article{osti_, title = {Computation of turbulent reacting flow in a solid-propellant ducted rocket}, author = {Chao, Y and Chou, W and Liu, S}, abstractNote = {A mathematical model for computation of turbulent reacting flows is developed under general curvilinear coordinate systems.

An adaptive, streamline grid system is generated to deal with the complex flow structures in a multiple. Hogg S, Leschziner M A (), Computation of highly swirling confined flow with a Reynolds-stress turbulence model, J. AIAA, 27, pp. Leschziner M A, Dimitriadis K P, (), Computation of three-dimensional turbulent flow in non-orthogonal junctions by a branch-coupling method, Computers and Fluids, 17, pp.

Close Drawer Menu Close Drawer Menu Menu. Home; Journals. AIAA Journal; Journal of Aerospace Information Systems; Journal of Air Transportation; Journal of Aircraft; Journal of.

The effects of aspect ratio (L/D) on the rate of decay of swirl in a cylindrical chamber were experimentally studied using the Laser-Doppler-Anemometry technique.

Preliminary measurements revealed that water should be used as working fluid; the results pertaining to air were inferred from Reynolds number similarity. The steady-state measurements revealed that a solid body type of rotation can. Numerically simulated the Rayleigh-Benard natural convection flow.

Evaluated the performance of different turbulence closure models in the prediction of confined turbulent swirling flows. The models evaluated are; (i) a nonlinear k-(model, (ii) the Reynolds stress transport model, and.

Article. El Helou, I and Skiba, AW and Mastorakos, E () Experimental Investigation of Soot Production and Oxidation in a Lab-Scale Rich–Quench–Lean (RQL) Burner. Flow, Turbulence and Combustion.

ISSN Giusti, A and Mastorakos, E () Turbulent Combustion Modelling and Experiments: Recent Trends and Developments. Flow, Turbulence and Combustion, pp. Testing semi-lagrangian schemes of two-phase flow applications Summer Program,Center for Turbulence Research, Stanford. Mendez S., Eldredge J., Nicoud F., Poinsot T., Shoeybi M.

and Iaccarino G. Numerical study of a turbulent flow around a multi-perforated plate Summer Program, Center for Turbulence Research,Stanford.

Characterization of particle-laden, confined swirling flows by phase-doppler anemometry and numerical calculation. International Journal of Multiphase Flow[CrossRef] Keh-Chin Chang, Ching-Shun Chen. Development of a hybridk-## turbulence model for swirling recirculating flows under moderate to strong swirl intensities.

The range of values covered for the steady, single phase, turbulent flow are a jet-to-pipe diameter ratio of Ghoniem, A. and Gagnon, Y., " Numerical investigation of recirculating flow at moderate Reynolds numbers, " The AIAA 24th Aerospace Sciences Meeting, Reno, Nevada, JanuaryAIAA Ghoniem, A.

and Ng, K. K., " Effect of harmonic modulation on rates of entrainment in a confined shear layer, " The AIAA 24th Aerospace Sciences. On boundary layer transition in high-subsonic and transonic flow under the influence of acoustic disturbances and free-stream turbulence S.

MURTHY and F. STEINLE. Constant-volume combustion of a stoichiometric homogenous mixture of natural gas and air with global rotational motion (swirl) in a short cylindrical chamber has been studied experimentally and simulated numerically.

Swirl was generated by a rotating disc in the combustion chamber with variable intensity. Turbulence intensity was varied by changing the swirl level as well as changing the size Cited by: 2.

Large Eddy Simulation for Turbulent Buoyant Flow in a Confined Cavity Peng Shia-Hui, Lars Davidson International Journal of Heat and Fluid Flow.

Vol. 22, p. () Source term based synthetic turbulence inflow generator for eddy-resolving predictions of an airfoil flow including a laminar separation bubble. Computers & Fluids() Double-diffusive laminar free convection in a porous cavity simulated with the two-energy equation by: Full text of "Engineering Calculation Methods For Turbulent Flow" See other formats.

Recirculating Flow and Turbulence in a Low Aspect Ratio Dump Combustor. Karmakar, A. Kushari. Anisotropy, Particulate matter, Simulation, Swirling flow, Turbulent diffusion, Two-phase flow.

Numerical Torque Converter Performance Predictions: Validation and Application to a Rapid One Dimensional Approach. Bois. Predictions of local heat transfer coefficient with v 2-f turbulence model were in excellent agreement with the experimental data while the k-ɛ turbulence model over-predicted the flow features.

Behnia et al. [39] Turbulent heat transfer in confined and unconfined axisymmetric impinging jets with wide range of Re and H/D. The Effect of Swirling Number Variation on Turbulent Transport and Mixing Processes in Swirling Recirculating Flows: Experimental and Numerical Investigations.

3Stockholm, Sweden, S. [Conference item]. Full text of "Improved Modeling of Finite-Rate Turbulent Combustion Processes in Research Combustors" See other formats. Brooke Benjamin's original theories of fluid mechanical phenomena changed our basic understanding of cavitation bubbles, surface and internal waves, gravity currents, instabilities of shear flow over flexible surfaces, and swirling flows.

For some types of finite-amplitude wave phenomena, he generated integral constraints and derived new partial differential equations; by establishing their.

“ numerical computations of turbulent swirling flames in axisymmetric combustors ”. hmt volume on flow, mixing and heat transfer in furnaces edited, khalil, pp.

pergamon press. () “ experimental investigation of turbulent spray flame characteristics. Home Back Full Refereed Conference Papers Full Abstract Refereed/Reviewed Conference Papers Presentations at Seminars/Conferences Technical Reports PUBLICATIONS.

Patents A.K. Agrawal, and S. Vijaykant, Passive Noise Attenuation System, Patent Disclosure, University of Alabama, May C.M. Vickery, and A.K. Agrawal, “Means for On-Line, In-Situ Measurement of Entrained Air in. Turbulent swirling flow, the STARPIC computer code, turbulence modeling of turbulent flows, the k-xi turbulence model and extensions, turbulence parameters deduction from swirling confined flow measurements, extension of the k-xi to confined swirling recirculating flows, and general predictions for confined turbulent swirling flow are discussed.

It is assumed that the reader is famil­ iar with the contents of Vol. The contents of Vol. 2 are arranged in the following way: Chapter 11 de­ velops and discusses the equations governing fluid flow and introduces the simpler flow categories for which specific computational techniques are considered in Chaps.

FLUID MECHANICS AND PIPE FLOW: TURBULENCE, SIMULATION AND DYNAMICS - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free. Book 5/5(1). Mixing Analysis of a Swirling Recirculating Flow Using DNS and Experimental Data.

In: Int. Journal of Heat and Fluid Flow, 27[Article] Venkatesan, K. K. and Laurendeau, N. M. and Renfro, M. W. and Geyer, D. and Dreizler, A. (): Time-resolved measurements of OH in stable and extinguishing partially premixed turbulent opposed-jet flames.Also available from Taylor & Francis Ventilation of Buildings 2nd edition H.

Awbi. Hb: ISBN –0–––3 Pb: ISBN –0–––1.Riber, E., Moreau, M., Simonin, O. and Cuenot, B. () Towards Large Eddy Simulation of non-homogeneous particle laden turbulent gas flows using euler-euler approach, 11th workshop on two-phase flow predictions., Merseburg, Germany