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Sunday, July 26, 2020 | History

2 edition of Induces velocity field of a jet in a crossflow found in the catalog.

Induces velocity field of a jet in a crossflow

Richard L Fearn

Induces velocity field of a jet in a crossflow

by Richard L Fearn

  • 31 Want to read
  • 3 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Information Office in Washington, Springfield, Va .
Written in English

    Subjects:
  • Jets,
  • Speed,
  • Plumes (Fluid dynamics)

  • Edition Notes

    StatementRichard L. Fearn and Robert P. Weston
    SeriesNASA technical paper ; 1087
    ContributionsWeston, Robert P., joint author, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office
    The Physical Object
    Pagination144 p. :
    Number of Pages144
    ID Numbers
    Open LibraryOL14931863M

    The flowfields created by transverse injection of sonic gaseous jets through a circular nozzle into a supersonic crossflow have been experimentally investigated using planar Rayleigh/Mie scattering from silicon dioxide particles seeded into the crossflow stream. Helium and air were used as injectant gases allowing an examination of the effects of compressibility on the large-scale structural Cited by: The velocity field of a liquid jet in the near field ejecting out from an elliptic injector into a crossflow of air were investigated experimentally at conditions relevant to gas turbine applications. A rig was set up to investigate the injection of liquid jet in subsonic cross flow with a rectangular test section of cross section measuring Author: Ather Uzair Alvi, Amit Thakur, Srinivas Jangam, Pratheesh Kumar P., Venkat S. Iyengar.

      I am looking for any CFD simulations of a normal jet in crossflow with jet/crossflow velocity ratio from , Re: Normal Jet in Crossflow. A new method employing instantaneous 3D coupled measurements of planar laser-induced fluorescence and particle Image velocimetry is developed to compute 3D fluid fluxes. The three-dimensional fields of concentration and velocity are used for identifying the vortex structures and for the evaluation of the fluxes at the interface between a jet exiting in a by: 2.

    In this study, the distribution of surface heat transfer induced by dual side-jets injected into a hypersonic flow has been visualized using a temperature sensitive paint. The experiments were performed in both tandem and parallel injector arrangements, and the spacing between the injection holes was taken as a parameter in each arrangement. As a result, the aerodynamic heating in the Cited by: 1. The interaction of multiple tandem jets in a cross-flow has been studied through experiments. Experiments are conducted with 2–8 momentum and buoyant jets discharged into a perpendicular cross-flow. The tracer concentration field is measured by the laser-induced fluorescence technique.


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Induces velocity field of a jet in a crossflow by Richard L Fearn Download PDF EPUB FB2

Velocity and pressure measurements were made in planes perpendicular to the path of the jet for ratios of jet velocity to crossflow velocity ranging from 3 to The results of these measurements are presented in tabular and graphical forms.

An experimental investigation of a subsonic round jet exhausting perpendicularly from a flat plate into a subsonic crosswind of the same temperature was conducted.

Velocity and pressure measurements were made in planes perpendicular to the path of the jet for ratios of jet velocity to crossflow velocity ranging from 3 to The results of these measurements are presented in tabular and.

An experimental investigation of a subsonic round jet exhausting perpendicularly from a flat plate into a subsonic crosswind of the same temperature was conducted.

Velocity and pressure measurements were made in planes perpendicular to the path of the jet for ratios of jet velocity to crossflow velocity ranging from 3 to   This paper reports the results of an experimental investigation on the effects of jet velocity profiles on the flow field of a round jet in cross-flow (JICF) using laser-induced fluorescence and digital particle-image velocimetry techniques (DPIV).

Tophat and parabolic jets were considered, with the momentum ratios (MRs) ranging from to Cited by: Induced velocity field of a jet in a crossflow. and pressure measurements were made in planes perpendicular to the path of the jet for ratios of jet velocity to crossflow velocity ranging from 3 to The results of these measurements are presented in tabular and graphical forms.

A pair of diffuse contrarotating vortices is identified as Author: R. Fearn and R. Weston. “Velocity Field of a Round Jet in a Cross Flow for Various Jet Injection Angles and Velocity Ratios “A Study of Real Jet Effects on the Surface Pressure Distribution Induced by a Jet in a Crossflow,” NASA CR, March () The Induced Aerodynamics of Jet and Fan Powered V/STOL Aircraft.

In: Krothapalli A., Smith C.A Cited by:   A jet in crossflow - Volume - D. Needham, N. Riley, J. Smith. The flow of a jet of an inviscid, incompressible fluid emerging from a cylindrical pipe, of circular cross-section, into a stream of the same fluid is by: process is simplified to a single jet in a cross flow over a flat plate.

The flow field for film cooling is characterized by `weak' jets, which are ejected into the cross-flow boundary layer through inclined holes. One of the first detailed papers which report the transverse jet in the cross flow was written by Bergeles et al.

[2]. The jet in crossflow, or transverse jet, is a flowfield that has relevance to a wide range of energy and propulsion systems. Over the years, our group's studies on this canonical flowfield have focused on the dynamics of the vorticity associated with equidensity and variable density jets in crossflow, including the stability characteristics of the jet's upstream shear layer, as a means of Cited by: For VR =the jet flow momentum is not strong enough to penetrate through the crossflow boundary layer, validated in Fig.

7(a) where the crossflow boundary layer overwhelms the jet and flows downstream together with the jet, and thus produces less complex vortical structures in the near field of the jet exit, which is intuitively reflected in Figs. 5 and by: Jets in Crossflow Figure: Isometric view of a jet in crossflow.

Contours of velocity (v) on the symmetry plane indicate the extent of the jet. Jet cross--section, at various distances along the jet length is shown using contours of us. Streamlines at these locations indicate the stages of. Velocity field characteristics of the turbulent jet induced by direct contact condensation of steam jet in crossflow of water in a vertical pipe International Journal of Cited by: Flow structures of an elliptic jet in cross-flow were studied experimentally in a water tunnel using the laser-induced fluorescence technique (LIF), for a range of jet aspect ratio (AR) from tojet-to-cross-flow velocity ratio (VR) from 1 to 5, and jet Reynolds number from to The results show that the effects of aspect ratio (or jet exit orientation) are significant only in.

The measurements are discussed for jet-to-crossflow velocity ratios from 4 to The pressure measurements are compared with previous experiments and numerical solutions. Pulse-burst Particle Image Velocimetry(PIV) has been employed to acquire time-resolved data at 25 kHz of a supersonic jet exhausting into a subsonic compressible crossflow.

Data were acquired along the windward boundary of the jet shear layer and used to identify turbulenteddies as they convect downstream in the far-field of the interaction. Near Field Behavior of a Liquid Jet in a Crossflow Christopher T.

Brown and Vincent G. McDonell* Energy Research Consultants South Pointe Drive, Suite E Laguna Hills, CA Abstract The atomization and dispersion of a liquid jet injected into a high speed crossflow is relevant to many engineering applications. Dynamics of the flow field induced by multiple elevated jets in crossflow 5 It’s obvious to note the dominant clockwise sense of rotation of the shear layer vortices under all injection heights.

jet-to-cross-flow momentum flux ratio R, from tohave been used by changing the jet velocity and keeping constant the cross free stream velocity. The Schlieren images show that the relative small size of the duct would affect the development of transverse jets when R.

ing is linear with distance, and all cross-jet velocity profiles, except those very near the orifice, are similar to one another, after suitable averaging over turbulent fluc-tuations. Observations suitably averaged over the many turbulent fluctuations (Figures and ) reveal that the velocity in the jet obeys a law of similarity: All File Size: KB.

Experimental study of counter-rotating vortex pair trajectories induced by a round jet in cross-flow at low velocity ratios 28 February | Experiments in Fluids, Vol. 54, No. 3 Supersonic jet and crossflow interaction: Computational modelingCited by:.

Transverse jet in supersonic crossflow: A jet in crossflow (JICF) is a fundamental canonical flow for the investigation of turbulent mixing and combustion.

It is of relative simplicity yet retaining many features of interest, such as three-dimensionality, separation and recirculation regions, wall .Velocity field for a reacting/non-reacting jet in swirling crossflow exhibits higher in-plane velocity gradients as compared to jets in uniform crossflow.

The vorticity field is also found to be weaker in case of jets in uniform crossflow as a result there is delay in the formation of the wake vortex : Pratikash Prakash Panda.This paper focuses on the velocity field characteristics of the turbulent jet induced by DCC of steam jet in crossflow of water in a vertical pipe, with a range of high steam mass flux up to kg/m2 s.

The velocity field, jet centerline trajectory and lateral distribution of velocity are investigated.