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.
Get MoreMixing problem in supersonic chemical oxygen-iodine lasers Schall, Wolfgang O. 00:00:00 ABSTRACT The injection and mixing of iodine vapor into a duct flow has been investigated experimentally and numerically. Laserâ induced fluorescence has been used to visualiâ ze the progress of spreading of the iodine and its distribution homogeneity along the …
Get MoreLaser-Induced Iodine Fluorescence Applied to Confined Supersonic Mixing Marc Havermann French-German Research Institute Saint-Louis (ISL) 5, Rue du Général Cassagnou, F-68301 Saint-Louis, France ABSTRACT A laser-induced fluorescence (LIF) measurement system is presented and applied to the study of supersonic gas flows at low density. The LIF technique …
Get MoreThe O2(1Δ)/I2 mixing process is one of the most important steps in chemical oxygen–iodine laser (COIL). Based on the chemical fluorescence method (CFM…
Get MoreInjection 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 ...
Get MoreWe 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 ...
Get MoreA 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 primary and secondary flows. Made up of a series of thin alternating wedges placed adjacent to each other, the nozzle looks like the letter X when it is viewed from the side.
Get MoreExperimental Study on Supersonic Mixing Using Clover Nozzle. Z A Samitha, B Swaraj Kumar and P Balachandran; 18 June 2012. Design and Testing of Clover Nozzle. B Swaraj Kumar, Z A Samitha, S Sheena and P Balachandran; 15 June 2012. Transverse Supersonic Controlled Swirling Jet in a Supersonic Cross Stream. S. Murugappan, E. …
Get MoreLaser-Induced Iodine Fluorescence Applied to Confined Supersonic Mixing Marc Havermann French-German Research Institute Saint-Louis (ISL) 5, Rue du Général Cassagnou, F-68301 Saint-Louis, France ABSTRACT A laser -induced fluorescence (LIF) measurement system is presented and applied to the study of supersonic gas flows at low density. The LIF technique …
Get MoreThe injection and mixing of iodine vapor into a duct flow has been investigated experimentally and numerically. Laser-induced fluorescence has been used to visualize the progress of spreading of the iodine and its distribution homogeneity along the duct. Several injection methods, typical flow pressures for oxygen-iodine lasers, and various molar flux …
Get MoreSeveral injection methods, typical flow pressures for oxygen-iodine lasers, and various molar flux ratios have been examined to find the most favorable conditions for the mixing in supersonic lasers. A one-dimensional gasdynamic and kinetic computer model taking into account a zone of bulk type mixing with variable extension was used for estimating the …
Get MoreThe 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 full- implicit …
Get MoreKeywords: chemical oxygen-iodine laser, atomic iodine, supersonic mixing 1. INTRODUCTION It has been published1 that areplacement of molecular iodine with atomic iodine is advantageous for the operation of Chemical Oxygen-Iodine Laser (COIL) and could be very helpful also for the Discharge Oxygen-Iodine Laser (DOIL). The possible methods for …
Get MoreA 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 ...
Get MorePROBLEM TO BE SOLVED: To accelerate the energy transfer reaction by placing an iodine mixing nozzle so as to mix an I flow in a sonic region in an ultrasonic nozzle for accelerating a main flow containing exciting oxygen. SOLUTION: An exciting oxygen gas main flow mixed with nitrogen gas is fed to the upstream of a slit type supersonic nozzle 1 integrated with an …
Get MoreNow, here is where the iodine comes in, it is injected into the air flow upstream of the supersonic nozzle to make the lasing action possible because oxygen has too much stability in this generator. The dissociation of the iodine molecules into atoms allows rapid transfer of energy. But, there are still power losses that further research seeks to remedy utilizing direct …
Get MoreOptimization 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 …
Get MoreThe injection and mixing of iodine vapor into a duct flow has been investigated experimentally and numerically. Laser-induced fluorescence has been used to visualize the progress of spreading of the iodine and its distribution homogeneity along the duct. Several injection methods, typical flow pressures for oxygen-iodine lasers, and various molar flux …
Get MoreThe 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. We compare three different trip jet configurations for their ability to enhance mixing between the oxygen and iodine flows. We present an experimental study of a supersonic nozzle with supersonic iodine injection. …
Get MoreThe 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 model are solved using a full-implicit finite volume …
Get MoreThe 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 full- implicit finite volume method.
Get MoreThe injection and mixing of iodine vapor into a duct flow has been investigated experimentally and numerically. Laser-induced fluorescence has been used to visualize the progress of spreading of the iodine and its distribution homogeneity along the duct. Several injection methods, typical flow pressures for oxygen-iodine lasers, and various molar flux …
Get MoreMixing 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. Computational …
Get MoreMixing between supersonic streams being more difficult, the supersonic nozzle and the iodine injectors must be designed to provide both adequate penetration of the iodine stream into the oxygen flow and adequate mixing between the oxygen and iodine flows (Madden et al. 1999). The two mixing schemes (subsonic vs. supersonic region injection) have their …
Get MoreSupersonic mixing layer flows are taken in scramjet engines for enhancing mixing and combustion efficiency. The spatial growth of supersonic reacting mixing layers with streams of dilute hydrogen and air has been investigated using direct numerical simulation, with detailed chemical reaction mechanisms. Different inlet air temperatures are considered to trigger auto …
Get MoreThe present invention relates to the proving installation in a kind of oxygen/iodine supersonic speed heat of mixing flow field.Adopt a set of image measurement device based on high-speed CCD camera, quantitative test is carried out to the mixing situation of Chemical oxygen-iodine laser (COIL) heat flow field (i.e. the operating true flow field of Chemical oxygen-iodine laser) …
Get MoreSeveral injection methods, typical flow pressures for oxygen-iodine lasers, and various molar flux ratios have been examined to find the most favorable conditions for the mixing in supersonic lasers. A one-dimensional gasdynamic and kinetic computer model taking into account a zone of bulk type mixing with variable extension was used for estimating the …
Get MoreWhen mixed as he's stated, whether it's for single use or to mix a larger amount, the over the counter povidone iodine you can purchase at most places is 10%. Use 1/2 teaspoon in 1.5oz water which gives you sufficiently diluted povidone iodine. I use 6oz sterilized or bottled water, 2 teaspoons of 10% povidone iodine, 1/2 teaspoon pure salt (sea salt or any salt with …
Get Moresupersonic 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-aerosol singlet oxygen generator, laser power, chemical …
Get MoreRequest PDF | Supersonic Mixing of Chemical Oxygen-Iodine Laser with AW Struts | AW(alternating wedge)-struts are applied for the enhancement of mixing in the supersonic chemical oxygen-iodine laser.
Get MoreMixing in a supersonic COIL laser: influence of trip jets. 5 August 2010 | Experiments in Fluids, Vol. 50, No. 2. Numerical Simulation on Supersonic-Flow Chemical Oxygen-Iodine Laser Adopting High Mach-Number Ramp-Nozzle Array. JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, Vol. 55, No. 641. …
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