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QUANTITATIVE MIXING MEASUREMENTS OF A SUPERSONIC

A supersonic nozzle with supersonic iodine injection was designed and studied with Planar Laser-Induced Fluorescence (PLIF). The nozzle simulates Chemical Oxygen Iodine Laser (COIL) flow conditions with non-reacting, cold flows. A laser sheet near 565 nm excited the iodine, and the fluorescence was imaged with an intensified and gated CCD camera.

Novel mixing nozzles for supersonic chemical oxygen iodine

Mixing enhancement technique of supersonic chemical oxygen-iodine laser (COIL) is studied. The difficulty of supersonic mixing due to the compressibility of the fluid has been overcome by the introduction of streamwise vortex into the flow. The developed nozzle is a staggered array of wedges, looks like “X” letter from the side of the flow

CFD-based optimization of iodine mixing for a supersonic COIL

Nov 10, 2003 Optimization of iodine injection scheme was conducted in Miki Pulley Co., Ltd. using CFD approach. Variation of the mixing speed as a function of an I 2 jet penetration depth, nozzle expansion ratio, and I 2 injection point are analyzed. It was found that the inherent geometry of our nozzle and I 2 injector affects the I 2 mixing process. Influence of a backpressure to the cavity flow

Novel mixing nozzles for supersonic chemical oxygen-iodine

Nov 01, 2003 Mixing enhancement technique of supersonic chemical oxygen-iodine laser (COIL) is studied. The difficulty of supersonic mixing due to the compressibility of the fluid has been overcome by the introduction of streamwise vortex into the flow. The developed nozzle is a staggered array of wedges, looks like "X" letter from the side of the flow duct.

(PDF) Optimization of a Highly Efficient Supersonic COIL

The mixing efficiency for supersonic injection of iodine (~ 0.85) is found to be much larger than for transonic injection (~ 0.5), the maximum values of the gain being ~ 0.65%/cm for both

Mixing/reacting zone structure and small signal gain

The flow field of a supersonic flow chemical oxygen-iodine laser is simulated solving three-dimensional Navier-Stokes equations, and the dependence of the mixing/reacting zone structure and the resulting gain region on the effective velocity ratio of I 2 jet to the primary flow is studied. It is assumed that the flow is laminar and the water vapor condensation due to the supersonic cooling is

An experimental research on the mixing process of

Dec 01, 2014 The O 2 (1 Δ)/I 2 mixing process is one of the most important steps in chemical oxygen–iodine laser (COIL). Based on the chemical fluorescence method (CFM), a diagnostic system was set up to image electronically excited fluorescent I 2 (B 3 П 0) by means of a high speed camera.An optimized data analysis approach was proposed to analyze the mixing process of supersonic oxygen–iodine

Experimental investigation of a supersonic swept ramp

Experimental investigation of a supersonic swept ramp injector using laser-induced iodine fluorescence. Roy J. Hartfield Jr.,Numerical study of supersonic mixing and combustion using unstructured grid.

QUANTITATIVE MIXING MEASUREMENTS OF A SUPERSONIC

A supersonic nozzle with supersonic iodine injection was designed and studied with Planar Laser-Induced Fluorescence (PLIF). The nozzle simulates Chemical Oxygen Iodine Laser (COIL) flow conditions with non-reacting, cold flows. A laser sheet near 565 nm excited the iodine, and the fluorescence was imaged with an intensified and gated CCD camera.

Quantitative Mixing Measurements of a Supersonic Injection

Injection penetration and mixing quality of a supersonic iodine injection nozzle is investigated. A nozzle was designed with COIL chemistry consideration and was tested using non-reacting flows. A

Mixing in a supersonic COIL laser: influence of trip jets

To enhance the mixing between the flows, trip jets are placed in the wake of the single jet. The sonic trip jets, significantly smaller than the primary supersonic iodine jet, are intended to destabilize the counter-rotating vortex pair (CRVP) of the primary jet.

(PDF) Optimization of a Highly Efficient Supersonic COIL

The mixing efficiency for supersonic injection of iodine (~ 0.85) is found to be much larger than for transonic injection (~ 0.5), the maximum values of the gain being ~ 0.65%/cm for both

An experimental research on the mixing process of

Dec 01, 2014 The O 2 (1 Δ)/I 2 mixing process is one of the most important steps in chemical oxygen–iodine laser (COIL). Based on the chemical fluorescence method (CFM), a diagnostic system was set up to image electronically excited fluorescent I 2 (B 3 П 0) by means of a high speed camera.An optimized data analysis approach was proposed to analyze the mixing process of supersonic oxygen–iodine

Mixing/reacting zone structure and small signal gain

The flow field of a supersonic flow chemical oxygen-iodine laser is simulated solving three-dimensional Navier-Stokes equations, and the dependence of the mixing/reacting zone structure and the resulting gain region on the effective velocity ratio of I 2 jet to the primary flow is studied. It is assumed that the flow is laminar and the water vapor condensation due to the supersonic cooling is

QUANTITATIVE MIXING MEASUREMENTS OF A SUPERSONIC

A supersonic nozzle with supersonic iodine injection was designed and studied with Planar Laser-Induced Fluorescence (PLIF). The nozzle simulates Chemical Oxygen Iodine Laser (COIL) flow conditions with non-reacting, cold flows. A laser sheet near 565 nm excited the iodine, and the fluorescence was imaged with an intensified and gated CCD camera.

Quantitative Mixing Measurements of a Supersonic Injection

Injection penetration and mixing quality of a supersonic iodine injection nozzle is investigated. A nozzle was designed with COIL chemistry consideration and was tested using non-reacting flows. A

Mixing in a supersonic COIL laser: influence of trip jets

To enhance the mixing between the flows, trip jets are placed in the wake of the single jet. The sonic trip jets, significantly smaller than the primary supersonic iodine jet, are intended to destabilize the counter-rotating vortex pair (CRVP) of the primary jet.

(PDF) Optimization of a Highly Efficient Supersonic COIL

The mixing efficiency for supersonic injection of iodine (~ 0.85) is found to be much larger than for transonic injection (~ 0.5), the maximum values of the gain being ~ 0.65%/cm for both

Defense Technical Information Center Compilation Part Notice

The mixing efficiency for supersonic injection of iodine (- 0.85) is found to be much larger than for transonic injection (- 0.5), the maximum values of the gain being 0.65%/cm for both injection schemes. Measurements of the gain distribution as a function of the iodine molar flow rate n12 were carried out.

Experimental investigation of a supersonic swept ramp

Experimental investigation of a supersonic swept ramp injector using laser-induced iodine fluorescence. Roy J. Hartfield Jr.,Numerical study of supersonic mixing and combustion using unstructured grid.

Supersonics an overview ScienceDirect Topics

Supersonic mixing nozzle for a COIL where molecular iodine is injected transverse to the flow of singlet oxygen. The iodine dissociation process is poorly understood and provides the greatest difficulty in modeling the gas-phase kinetics of the COIL device.

Mixing enhancement of low pressure supersonic F + H2

Mixing enhancement of low pressure supersonic F + H2 streams by means of fluid injection. A. B. Witte ,

Scalable chemical oxygen iodine laser

supersonic COIL with singlet oxygen and iodine mixing in parallel flows are also experimentally studied. The output power of ~7.5 kW, corresponding to a specific power of 230 W cm–2, is achieved. The maximum chemical efficiency of the COIL is ~30%. Keywords: chemical oxygen iodine laser (COIL), scaling, twisted-

Laser-induced iodine fluorescence technique for

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

A 33% efficient chemical oxygen–iodine laser with

May 27, 2003 We report on a highly efficient supersonic chemical oxygen–iodine laser (COIL), with supersonic mixing of iodine and oxygen. Output power exceeding 0.5 kW with chemical efficiency of ∼33% was obtained in a 5-cm gain length for Cl 2 flow rate of 17 mmole/s. A 33% efficiency is the highest reported chemical efficiency of any supersonic COIL.

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locations. A mixing parameter, defined from the histograms, is used to measure the mixing quality with downstream distance. Introduction ISTORICALLY, Chemical Oxygen Iodine Lasers (COIL) employ supersonic nozzles in which iodine and carrier helium are injected into a mixture of helium and singlet delta oxygen, 02(lA), upstream of the nozzle

Computational fluid imaging for iodine fluorescence in

Sep 01, 1998 D.W. Riggins, C.R. McClinton, A computational investigation of mixing and reacting flows in supersonic combustors, AIAA 92-0626, 33rd Aerospace Sciences Meeting and Exhibit, Reno, NV, 1995. [7] J.C. McDaniel, Investigation of laser-induced fluorescence for measurement of density in compressible flows, Ph.D. Dissertation, Department of

Numerical Simulation of Interaction between Supersonic

plied not only to scramjet engines but also to chemical oxygen iodine lasers 1]. [Many researchers have investigated supersonic mixing techniques such as tech-niques using streamwise vortexes, and techniques using cavities. Gerlinger et al. [2] investigated a lobed strut injector to create counter-rotating streamwise vor-