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Friday, July 10, 2020 | History

3 edition of Dynamics of large-scale structures for jets in crossflow found in the catalog.

Dynamics of large-scale structures for jets in crossflow

Dynamics of large-scale structures for jets in crossflow

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  • 24 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Computational fluid dynamics.,
  • Gas turbine engines.,
  • Gas turbines.,
  • Cross flow.,
  • Dynamic structural analysis.,
  • Magnetic field reconnection.,
  • Wakes.

  • Edition Notes

    Other titlesDynamics of large scale structures for jets in crossflow.
    StatementFrank Muldoon and Sumanta Acharya.
    Series[NASA contractor report] -- NASA/CR-1998-206606., NASA contractor report -- NASA CR-206606.
    ContributionsAcharya, Sumanta., Lewis Research Center., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15544534M

    Dynamics of Large-Scale Structures for Jets in a Crossflow. Frank Muldoon, Sumanta Acharya. Physics of Hot Crossflow Ingestion in Film Cooling. E. Lee McGrath, James H. Leylek. A Systematic Experimental Study on the Aerodynamics of Leading Edge Film Cooling on a Large Scale High Pressure Turbine Cascade. Sabine Ardey, Leonhard Fottner. Aug 26,  · The presence of large scale structures in circular jets is well documented in the literature over a wide range of Reynolds numbers. This presentation explores in more detail the generation and interaction and the role they play in the development of the flow field. It is based on experiments carried out, both in water and air jets, at Reynolds numbers up to 1,2 It is found, as Author: J. Laufer, F. K. Browand, R. A. Petersen.

    virtuosobs.com Technical Report: Design guide for single circular cylinder in turbulent crossflow. [LMFBR]Cited by: 2. The comparisons are undertaken for two mutually perpendicular planes in the jet-to-crossflow entrance zone (y/D = 0 and x/D = 1 planes), where in- and out-of plane velocity components in POD modes 1–6 are directly compared, showing a good quantitative agreement, underlining that LES predicts the same large scale flow dynamics as is captured Cited by:

    Although computational tools are well suited for modeling the dynamics of zero-net mass-flux actuators, the computational costs involved in large-scale flow control simulations necessitate the use of reduced-order models for these devices. A new reduced-order model based on modeling only the slot of ZNMF jets in grazing flows is proposed. Dynamics of Large-Scale Structures and Heat Transfer in Turbulent Mixed Convection A. Westhoff1, D. Schmeling1, J. Bosbach1 and C. Wagner1 1German Aerospace Center (DLR), Institute of Aerodynamics and Flow Technology, Bunsenstr. 10, D Gottingen, Germany, [email protected]¨.


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Dynamics of large-scale structures for jets in crossflow Download PDF EPUB FB2

Results of a three-dimensional unsteady computational study of a row of jets injected normal to a crossflow are presented with the aim of understanding the dynamics of the large-scale structures in the region near the jet.

The jet to crossflow velocity ratio is Cited by: 2. Dec 23,  · Muldoon, Frank, and Acharya, Sumanta. "Dynamics of Large-Scale Structures for Jets in a Crossflow." Proceedings of the ASME International Gas Turbine and Author: Frank Muldoon, Sumanta Acharya.

Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

On the development of large-scale structures of a jet normal to a cross flow Physics of Fluids 13, ( “ Vortex structure of circular jets in crossflow,” J. Wind Eng. and Industrial Aero 12, “ The dynamics of the near field of strong jets in crossflows,” J.

Fluid Mech. 95 Cited by: The velocity ratio of the jet to that of the cross-flow is and the Reynolds number based on the free Dynamics of large-scale structures for jets in crossflow book quantities and the jet exit diameter is The main objective of this study is to assess the effect of the hole exit geometry on the dynamics of large-scale structures in jets cross-flow interactions.

Fluid Dynamics of Highly Pitched and Yawed Jets in Crossflow Article in AIAA Journal 42(5) · May with 12 Reads How we measure 'reads'. Feb 01,  · Using the method of large-eddy simulation, the 3-dimensional turbulent jets in crossflow with stream-wise and transverse arrangements of nozzle are simulated, emphasizing on the dynamical process of generation and evolution of vortex structures in these flows.

The results show that the basic vortex structures in literatures, such as the counter-rotating vortex pair, leading-edge vortices, lee Cited by: 8. On the dynamics of the large-scale structures in round impinging jets By J.W.

HALL† AND D. EWING Department of Mechanical Engineering, McMaster University, Hamilton, ON, L8S 4L7, Canada (Received 21 March and in revised form 28 October ) Time-averaged two-point measurements of the fluctuating wall pressure and.

Turbulent particle dispersion in transverse jets depends closely on the evolution dynamics of the large scale fluid structures developing from the interaction between the jet and the crossflow.

Results of a three-dimensional unsteady computational study of a row of jets injected normal to a crossflow are presented with the aim of understanding the dynamics of the large-scale structures in the region near the jet.

The jet to crossflow velocity ratio is Abstract. This paper presents results of the application of the Two-Stage Lagrangian (TSL) model of Broadwell and Lutz to the basic and advanced rebuming processes in a kW natural gas fired Boiler Simulator Facility (BSF).Author: M.

Mungal, Donghee Han. Apr 19,  · Large-scale structure in the mixing layer of a round jet - Volume 89 Issue 3 - A. Yule Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our virtuosobs.com by: Adaptive Turbulent Schmidt Number Approach for Multi-Scale Simulation of Supersonic Crossflow to inability to produce large scale turbulent structures.

To the authors’ knowledge, there have been limited or no efforts in the literature to combine both hybrid RANS/LES type approaches with variable turbulent Schmidt number methods. The length of the structures is 3 to 5 times the flow depth while the width is between and 1 times flow depth.

In spite of the high roughness of the bed, these values are similar to those reported in the literature for laboratory experiments on large-scale turbulent flow structures. The dynamics of the large-scale turbulent flow structures.

Some Climate and Large Scale Dynamics (CLD) proposals address multidisciplinary problems and are often co-reviewed with other NSF programs, some of which, unlike CLD, use panels in addition to mail reviewers, and thus have target dates or deadlines.

The results show that the large-scale turbulent flow structures in a gravel-bed river occupy the entire depth of the flow and that they are elongated and narrow. The length of the structures is 3 to 5 times the flow depth while the width is between and 1 times flow depth.

Large Scale Turbulent Structures in Supersonic Jets by Ram Mohan Rao and Thomas S. Lundgren, P.I. We have solved this eigenvalue problem by a method described in a book by Betchov and Criminale. We integrate inward from a large radius, using an asymptotic formula dynamics of the temporal jet is not greatly different from that of a.

near-field region of jet development is dominated by vortex dynamics, evidence of an analogous large-scale organization in the self-preserving region is not yet conclusive. Interest in the possible large-structure organization of the far field of turbulent jets and buoyant plumes has been fuelled by the large-scale flow organization apparent.

Jul 20,  · Jet in crossflow mixing “On the development of large-scale structures of a jet normal to a cross flow”, Phys of Fuild (),Vol. 13, pp upstream vortices and the lee-side vortices, respectively.

Grinstein et al, “Dynamics of coherent structures and trasitioin to turbulence in free square jets”, Phys of Fuild (),Vol. Finally, snapshot proper orthogonal decomposition (POD) analysis was conducted, characterizing the coherent structures of the flow field, particularly the large-scale vortices.

It was observed that the large-scale vortices mainly occur in the shear layers of the jets and their occurrence is affected by the parameters of the virtuosobs.com by: 4. Large Scale Turbulent Structures in Supersonic Jets. J- ' \ / by Ram Mohan Rao and We have solved this eigenvalue problem by a method described in a book by Betchov and Criminale.

We integrate inward from a large radius, using an asymptotic formula dynamics of the temporal jet is not greatly different from that of a spatially.The large scale structure and mixing characteristics of the flowfield surrounding a single, underexpanded, sonic, transverse jet injected into a Mach crossflow were experimentally studied.

The flowfield was investigated at three distinct sets of flow conditions corresponding to a jet-to-crossflow momentum flux ratio of, and The chapter also constructs a computational model of a transverse jet in which actuations may be imposed as time-dependent boundary conditions to understand the vortex dynamics of the actuated flow, in particular the dynamic response of large-scale vortical structures—such as the counter-rotating vortex pair—to various modes of virtuosobs.com: Y.M.

Marzouk, A.F. Ghoniem.