Mixing enhancement in a lobed injectorPhysics of Fluids
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Mixing enhancement in a lobed injectorPhysics of Fluids.

Mixing enhancement in a lobed injector: Physics of Fluids ...

Jun 04, 1998  An experimental investigation of the non-reactive mixing processes associated with a lobed fuel injector in a coflowing air stream is presented. The lobed

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Mixing enhancement in a lobed injector - AIP Publishing

Jun 04, 1998  An experimental investigation of the non-reactive mixing processes associated with a lobed fuel injector in a coflowing air stream is presented. The lobed

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Mixing enhancement in a lobed injector

length l of the lobes was 1.905 cm, and the peak-to-peak amplitude at the exit was 3.721 cm. The injector had five lobes and spanned the width of the wind tunnel; it

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Mixing Enhancement in a Lobed Injector - NASA Technical ...

Mixing Enhancement in a Lobed Injector An experimental investigation of the non-reactive mixing processes associated with a lobed fuel injector in a coflowing

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Mixing enhancement in a lobed injector - NASA/ADS

An experimental investigation of the non-reactive mixing processes associated with a lobed fuel injector in a coflowing air stream is presented. The lobed fuel

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Passive Fuel–Air Mixing and Emissions Control via Lobed ...

O. I., “Mixing Enhancement in a Lobed Injector,” Physics of Fluids,Vol. 9, No. 3, 1997, ... cally the quantification of passive fuel–air mixing via lobed

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Passive Fuel?Air Mixing and Emissions Control Via Lobed ...

The mixing characteristics of two different kinds of fluids with non-reaction in the lobed injector were numerically studied by using FLUENT CFD(computational

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Computational study of viscous effects on lobed mixer flow ...

May 23, 2012  Flow structures of a lobed mixer and effects of streamwise vortices on mixing enhancement Physics of Fluids, Vol. 31, No. 6 Suggestions on investigations of

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Experimental and Computational Study of Mixing Mechanisms ...

The simulation results illustrate the creation of streamwise vorticity in the lobes and its subsequent interaction with the spanwise vorticity shed from the trailing

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Experimental and numerical study of mixing characteristics ...

A combined experimental and computational study on a rectangular lobed mixer is performed. A series of simulations based on a steady Reynolds-averaged Navier-Stokes

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Mixing Enhancement in a Lobed Injector - NASA Technical ...

Mixing Enhancement in a Lobed Injector An experimental investigation of the non-reactive mixing processes associated with a lobed fuel injector in a coflowing air stream is presented. The lobed fuel injector is a device which generates streamwise vorticity, producing high strain rates which can enhance the mixing of reactants while delaying ignition in a controlled manner.

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Mixing Enhancement in Freejets from Supersonic ESTS Lobed ...

The ESTS lobed nozzle has shown mixing enhancement with 4 lobes. The spreading rate was found to be double of the reference conical nozzle [4]. This paper is motivated by the need to investigate the flow physics involved in the ESTS lobed nozzle. The effect of varying ‘the number of lobes’ and ‘the design Mach number’ of the nozzle on ...

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Flow structures of a lobed mixer and effects of streamwise ...

Flow structures of a lobed mixer and effects of streamwise vortices on mixing enhancement. Large-scale vortices downstream of a lobed mixer are investigated experimentally using a nanoparticle-based planar laser scattering experimental system. The results are contrasted with additional measurements of a flat plate and a convoluted plate.

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Kinematic and mixing characteristics of vortex interaction ...

Feb 11, 2021  The underlying effect of vortex interaction characterized by the merging and non-merging on mixing enhancement is of fundamental significance to understand the flow dynamics of strut injectors in scramjets. Starting from a simplified configuration of a vortex generator, this study focuses on the influence of geometric parameters on vortex structures and fluid mixing through compressible Navier ...

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Passive Fuel?Air Mixing and Emissions Control Via Lobed ...

The mixing characteristics of two different kinds of fluids with non-reaction in the lobed injector were numerically studied by using FLUENT CFD(computational fluid dynamics) software.

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Vortical and turbulent structure of a lobed mixer free ...

May 17, 2012  Turbulent structures and mixing enhancement with lobed mixers in a supersonic mixing layer Physics of Fluids, Vol. 32, No. 4 Mechanisms of lobed jet mixing: About circularly alternating-lobe mixers

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Forced mixer lobes in ejector designs Journal of ...

May 23, 2012  Experimental Thermal and Fluid Science, Vol. 22, No. 3-4 ... Large eddy simulation of a compressible mixing layer - Study of the mixing enhancement. ... Mixing enhancement in a lobed injector. Physics of Fluids, Vol. 9, No. 3. Mixing Characteristics of Forced Mixers with Scalloped Lobes.

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Flow structures of a lobed mixer and effects of streamwise ...

Greater mixing enhancement is observed in the lobed mixer with a larger penetration angle. The lobed mixers have potential applications for mixing enhancement in air-breathing propulsion systems ...

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Experiments on liquid mixing and reaction in a vortex ...

The experimental results show that the mixing enhancement in the presence of a vortex is linearly dependent on the vortex strength and the time elapsed since vortex initiation. In particular, the mixedness, defined as the spatially integrated second moment of concentration field in the vortex, and the spatially averaged scalar dissipation are ...

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Numerical Simulation of the Vortical Structures in a Lobed ...

Lobed mixers/nozzles, which are essentially splitter plates with corrugated trailing edges, provide an extraordinary means for efficiently generating strong streamwise vortices and associated cross-stream circulation in co-flowing streams. Due to their outstanding performance of mixing enhancement, lobed mixers/nozzles have been

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UCLA Energy Propulsion Research Laboratory :: Lobed Fuel ...

Layout of lobed injector showing gap through which fuel is injected. This project involves modeling, design, construction, and testing of a unique lobed injector/burner. The shape of the burner is designed to generate a large degree of streamwise vorticity with low a pressure drop. This results in very rapid mixing of the fuel, which is ...

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Jet impingement heat transfer from lobed nozzles ...

Jul 01, 2011  The convective heat transfer data are expressed in terms of the local Nusselt number. Fig. 4, Fig. 5 show the Nu-profile for normalised standoff distances (z/D) from 1–12 and Re ranging from 15,000 to 50,000 for the lobed geometries.The three-lobe and four-lobe nozzle exits are considered; the Nu-profile corresponds to the vertical line passing through the stagnation point.

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Fluid Dynamics and Combustion Tree - Frank E. Marble

Smith LL, Majamaki AJ, Lam IT, et al. (1997) Mixing enhancement in a lobed injector Physics of Fluids. 9: 667-678: Marble FE. (1994) Gasdynamic enhancement of nonpremixed combustion Symposium (International) On Combustion. 25: 1-12

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Frank E. Marble - Publications

Mixing enhancement in a lobed injector Physics of Fluids. 9: 667-678. 1: 1994: Marble FE. Gasdynamic enhancement of nonpremixed combustion Symposium (International) On Combustion. 25: 1-12. DOI: 10.1016/S0082-0784(06)80621-1 : 1: 1994: Ton

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Passive Mixing Control via Lobed Injectors in High Speed ...

Mixing, Diffusion, and Chemical Reaction of Liquids in a Vortex Field Some Consequences of the Boundedness of Scalar Fluctuations Passive Mixing Control via Lobed Injectors in High Speed Flow ...

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Frank E. Marble - Publications

Mixing enhancement in a lobed injector Physics of Fluids. 9: 667-678. 1: 1994: Marble FE. Gasdynamic enhancement of nonpremixed combustion Symposium (International) On Combustion. 25: 1-12. DOI: 10.1016/S0082-0784(06)80621-1 : 1: 1994: Ton

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Enhanced mixing of supersonic jets Journal of Propulsion ...

May 23, 2012  Effect of wavy wall strut fuel injector on shock wave development and mixing enhancement of fuel and air for a scramjet combustor. ... Experiments in Fluids, Vol. 57, No. 5 ... Passive Mixing Control via Lobed Injectors in High-Speed Flow.

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Jet Fluid Mixing Control Through Manipulation Jet Fluid ...

Radially lobed nozzles, a cross-shaped and a clover-shaped with four lobes each, are analyzed in comparison to a conical nozzle. In addition, a few modified radially lobe nozzles, including a 6-lobe nozzle and an 8-lobe nozzle, two type of fully penetrating nozzles, and a cross-shaped nozzle with centerbody, are examined in order to achieve ...

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High mixing effectiveness lobed nozzles and mixing mechanisms

Download Citation High mixing effectiveness lobed nozzles and mixing mechanisms For a circular lobed nozzle with the exit plane displaced from the center body, adding a central plug at exit or ...

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Mixing Enhancement in a Coaxial Jet Mixer

Experimental investigations of mixing in a coaxial jet mixer have been carried out applying Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF) methods simultaneously. A developed turbulent jet of an aqueous solution of Rhodamine 6G issued from the nozzle was mixed with co-flow water. Velocity and scalar fields were studied quite far downstream flow to control the ...

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Supersonic mixing in airbreathing propulsion systems for ...

Aug 01, 2019  The mixing enhancement induced by a lobed strut located at the channel symmetry axis was studied by Gerlinger et al. . This shape was selected to produce strong streamwise vorticity which is beneficial for the hydrogen/air mixing enhancement. However, this strut would cause an increase in entropy and larger losses in total pressure.

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[PDF] A study on a lobed jet mixing flow by using ...

DOI: 10.1063/1.1409537 Corpus ID: 16175800. A study on a lobed jet mixing flow by using stereoscopic particle image velocimetry technique @article{Hu2001ASO, title={A study on a lobed jet mixing flow by using stereoscopic particle image velocimetry technique}, author={Hui Hu and T. Saga and T. Kobayashi and N. Taniguchi}, journal={Physics of Fluids}, year={2001}, volume={13},

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Numerical investigation of mixing and combustion ...

Mar 01, 2008  A numerical study of mixing and combustion enhancement has been performed for a Mach 2 model scramjet (supersonic combustion ramjet) combustor. Fuel (hydrogen) is injected at supersonic speed through the rear of a lobed strut located at the channel symmetry axis.

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Calendar Internal Flows in Turbomachines Aeronautics ...

Mixing enhancement due to streamwise vorticity, lobed mixer nozzles. Fluid impulse and the generation of vorticity, streamwise vorticity structure and the evolution of a jet in crossflow. Concept quiz 2: IV. Loss sources and loss accounting [CT] 10: Introduction to concepts, metrics for loss. Introduction: Appropriate metrics for loss

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VITA: Ann Renee Karagozian

Member, Exec. Comm., American Physical Soc./Div. of Fluid Dynamics, 1998-2001 Member, Exec. Comm., Western States Sect./The Combustion Institute, 1999-present Member, ASEB Committee to Identify Breakthrough Technologies, 1997-98 Associate Editor,Journal of Propulsion and Power, 1996-98 Member, NAS NSB Technology for Future Naval Forces Study ...

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UCLA Energy Propulsion Research Laboratory :: Publications

Energy Efficiency: Tranverse Jet Instabilities Control. Advanced Propulsion: Detonations, ionized gases, and turbulent combustion. Alternative Fuels: Acoustically Coupled Droplet Combustion

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High performance computing in science and engineering '08 ...

The magnetic field strength B = 0.14mT is very weak and the system is in the fluid state. The slope is chosen as α = 0.20 . Under these parameters the particles originating from the two inputs slightly mix. (b) Mixing behavior of a symmetric junction for the same parameters as in

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science.gov

Superconducting heavy ion injector linac. SciTech Connect. Shepard, K.W. 1985-01-01. A conceptual design for a very low velocity (.007 v/c .07) superconducting heavy-ion linac is

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