mixing iodine supersonic

The paper presents experimental studies of supersonic oxygen-iodine laser (OIL) using twisted-flow singlet oxygen generator (SOG) over a wide range of the singlet oxygen pressures and the buffer gas flow rates. The experiments used different designs of the nozzle unit and mixing system for singlet oxygen and iodine gas with the carrier …

COIL is the gas mixing in supersonic flow. Since mixing of a near-hypersonic nitrogen flow with a Mach-one oxygen flow is expected to be extremely slow, mixing enhancement schemes are required to achieve reasonable mixing within a practical distance. Nikolaev et al. used under-expanded high-pressure nitro-gen flow to produce …

The present study compares the laser medium properties for subsonic and transonic iodine injection schemes of a multi-kW grid-nozzle supersonic chemical oxygen iodine laser (COIL). Two supersonic nozzles of similar geometry having subsonic or transonic iodine injectors were investigated in the present study. Small signal gain …

The flow field of a suipersonic flow chemical oxygen-iodine laser is simulated by solving three-dimensional Navier-Stokes equations and the effects of the mixing / reacting zone structure on the ...

We report on an efficient supersonic chemical oxygen-iodine laser, energized by a jet-type singlet oxygen generator, operating without primary buffer gas and applying simple nozzle geometry and transonic mixing of iodine and oxygen.

The results of experimental study of a twisted-aerosol singlet oxygen generator meeting the COIL scal- ability requirements are presented. The energy characteristics of a 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 ...

The mixing efficiency for supersonic injection of iodine is found to be much larger than for transonic injection, the maximum values of the gain being approximately 0.65 percent/cm for both ...

Parametric study of a highly efficient chemical oxygen-iodine laser with supersonic mixing of iodine and oxygen. Authors: V. Rybalkin. A. Katz. B. D. …

In this study, the iodine LIF technique is applied to study the shear layer growth in the mixing chamber of a supersonic ejector test section at three convective Mach numbers. 2. LASER-INDUCED IODINE FLUORESCENCE TECHNIQUE The laser-induced fluorescence process can best be explained by means of Figure 2, where the potential …

The adoption of ramp nozzle array to a supersonic mixing chemical oxygen-iodine lasers is examined by simulating the mixing and reacting flow fields numerically. Then, the efficiency of the ramps ...

The adoption of a ramp nozzle array in supersonic mixing chemical oxygen-iodine lasers is examined by simulating the mixing and reacting flow fields numerically. Then, the efficiency of the ramps in improving the resulting gain region is studied. The compressible Navier-Stokes equations with a detailed chemical kinetic …

Abstract In this numerical study, the role of hyper-mixers on supersonic mixing is investigated for six different strut configurations. To this end, 3D, compressible, turbulent, non-reacting flow calculations with air as the secondary injectant have been carried out. A qualitative comparison of the predictions with experimental results is made …

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. …

A simple one-dimensional (1D) computational fluid dynamics (CFD) model of the chemical oxygen iodine laser (COIL) with supersonic mixing is compared with three-dimensional (3D) CFD models and with ...

The chemical oxygen-iodine laser (COIL) [] operates on the electronic transition of the I atom I(2 P 1/2)→I(2 P 3/2) and emits at 1315 nm.The complex kinetic, mixing and laser oscillation processes that take place in the reactive medium of the supersonic COIL can be described using either one-dimensional (1D) or three …

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 ...

DOI: 10.2514/6.1999-3429 Corpus ID: 100867447; An investigation of supersonic mixing mechanisms for the chemical oxygen-iodine laser (COIL) @inproceedings{Madden1999AnIO, title={An investigation of supersonic mixing mechanisms for the chemical oxygen-iodine laser (COIL)}, author={T. J. Madden and …

DOI: 10.1016/J.OPTLASTEC.2014.04.017 Corpus ID: 120782399; An experimental research on the mixing process of supersonic oxygen–iodine parallel streams @article{Zengqiang2014AnER, title={An experimental research on the mixing process of supersonic oxygen–iodine parallel streams}, author={Wang Zengqiang and Feng-ting …

Highly efficient supersonic chemical oxygen-iodine laser (COIL), with supersonic mixing of iodine and oxygen was investigated. Different mixing schemes were also compared. It was found that for supersonic mixing, the output power and chemical efficiency were about 20% higher than for transonic mixing scheme.

A supersonic expansion nozzle has allowed us to achieve highly efficient operation of the supersonic mixing chemical oxygen–iodine laser (COIL). The nozzle's shape produced a rapid mixing of ...

The adoption of ramp nozzle array to a supersonic mixing chemical oxygen-iodine lasers is examined by simulating the mixing and reacting flow fields numerically. Then, the efficiency of the ramps to improve the resulting gain region is studied. The compressible Navier-Stokes equations with a detailed chemical kinetic model are solved by using a …

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 ...

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

A supersonic expansion nozzle has allowed us to achieve highly efficient operation of the supersonic mixing chemical oxygen–iodine laser (COIL). The nozzle's shape produced a rapid mixing of ...

Mixing in a supersonic COIL laser: influence of trip jets. 5 August 2010 | Experiments in Fluids, Vol. 50, No. 2. Quantitative Mixing Measurements of a Supersonic Injection COIL Nozzle with Trip Jets. ... Laser-induced iodine fluorescence technique for quantitative measurement in a nonreacting supersonic combustor.

The computational simulations of the mixing flow field of supersonic chemical oxygen-iodine laser (COIL) using FLUENT (CFD) computation of fluid dynamics commercial software have been performed ...

The oxygen flows through the exit to an iodine–oxygen mixing system and expanded to supersonic velocity in a slit supersonic nozzle. As shown in Ref. 9, for supersonic mixing the output power and η chem are about 20% higher than for transonic mixing schemes. We therefore studied and optimized in the present work the …

The flow field of a supersonic flow chemical oxygen-iodine laser is simulated by solving three-dimensional Navier-Stokes equations and the effects of the mixing/ reacting zone structure on the resulting gain region are studied. It is assumed that the flow is laminar and the water vapor condensation due to the supersonic cooling is …

We report on a detailed parametric study of the extremely efficient supersonic chemical oxygen-iodine laser recently developed in our laboratory [V. Rybalkin, A. Katz, B. D. Barmashenko, and S. Rosenwaks, Appl. Phys. Lett. 85, 5851 (2004)].At the early stage of operation, 40.0% efficiency was measured for 1 s followed …

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.

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 …

Download Citation | Numerical Simulation on Supersonic-Flow Chemical Oxygen-Iodine Laser Adopting High Mach-Number Ramp-Nozzle Array | The characteristics of mixing between two flows of oxygen and ...