Parametric study of a twisted aerosol-type singlet oxygen generator

Wani, Fumio; Endo, Masamori; Vyskubenko, Boris A.; Ilyin, Sergei P.; Krukovsky, Ivan M.; Takeda, Shuzaburo; Fujioka, Tomoo

doi:10.1109/3.726605

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…The chlorine utilization was measured to be 90%, and the yield was measured to be 70% in our previous study [16]. The primary buffer flow rate was 50:0 mmol=s, and that of the iodine carrier was 13:8 mmol=s.…”

Section: Methodsmentioning

confidence: 99%

Development of Hybrid Simulation for Supersonic Chemical Oxygen-Iodine Laser

2007

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A numerical simulation method for a supersonic chemical oxygen-iodine laser is developed. The model is a combination of a three-dimensional computational fluid dynamics code without kinetics and a detailed onedimensional, multiple-leaky-stream-tubes kinetics code. In the proposed method, the detailed flowfield characteristic is calculated by solving a full Navier-Stokes equation that does not involve chemical reactions, and the resultant temperature, velocity, and mixing characteristics are input to the kinetics code as its boundary conditions. A "nonuniform coefficient" is introduced to transform the fluid-dynamic mixing to the diffusive mixing term of the kinetics code. As a result, precise predictions of the gain distribution and laser output are given with a reasonable computational cost. The developed model is applied to the X-wing-type supersonic mixing chemical oxygen-iodine laser, which we have developed, and the calculated gain and output power are compared with the experimental results. The excellent agreements of calculated and experimental results show the validity of the developed method. Nomenclature C 2 g = rate constant of the gth second order reaction C 3 h = rate constant of the hth third order reaction D a = artificial diffusion coefficient k = fitting parameter of the artificial diffusion constant M i = number density of the ith species n = number of primary flow layers and secondary flow layers n p = photon density P = optical power T = temperature of the active medium v = gas velocity x = coordinate lateral to the main flow (parallel to the optical axis) y = vertical coordinate z = coordinate to the main-flow direction = nonuniform coefficient I = iodine molar fraction

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Section: Methodsmentioning

confidence: 99%

Development of Hybrid Simulation for Supersonic Chemical Oxygen-Iodine Laser

2007

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“…The chlorine utilization was measured at 90%, and the yield was measured at 70%. 10 The primary buffer flow rate was 50.0 mmol/s, and that of the iodine carrier was 13.8 mmol/s. The I 2 /O 2 titration was controlled to 1.4%Ϯ0.1%.…”

Section: ͑2͒mentioning

confidence: 99%

High-efficiency chemical oxygen–iodine laser using a streamwise vortex generator

Endo

Osaka

Takeda

2004

Applied Physics Letters

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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 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. Iodine is injected at the exit plane of the nozzle and is strongly entrained by the streamwise vortices generated by the nozzle. 599 W of output power with a chemical efficiency of 32.9% is obtained, values higher by a factor of 1.4 than those of the conventional COIL.

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“…7-82 Torr). 12,13 Another new generator, a centrifugal bubbler generator (CBSOG), was suggested and developed by Zagidullin et al 14,15 The centrifugal force is employed for acceleration of gas bubbles and diminishing their size, which substantially increased the interfacial surface area, and reduced the gas/liquid contact time. The characteristic parameters of this SOG are Y ∆ > 50 %, U Cl ≥ 90 %, and relative water vapor content between 0.3 and 0.07 at generator pressure of 4-6.6 kPa (35-50 Torr).…”

Section: Introductionmentioning

confidence: 99%

Spray generator of singlet oxygen with a centrifugal separation of liquid

et al. 2008

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A new spray-type generator of singlet oxygen, O 2 ( 1 ∆), with a following centrifugal separation of depleted liquid was studied. This generator was developed to fulfill following requirements suitable for an advanced Chemical OxygenIodine Laser (COIL): (i) a high-pressure operation, (ii) a single pass of reaction liquid, (iii) an efficient disengagement of gas/liquid mixture, and (iv) a scalability for airborne and mobile application. The generator design takes advantage of very high g/l interfacial surface area of a fine spray produced by a two-phase nozzle and a very fast liquid separation by applying a high centrifugal force.

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Parametric study of a twisted aerosol-type singlet oxygen generator

Cited by 10 publications

References 12 publications

Development of Hybrid Simulation for Supersonic Chemical Oxygen-Iodine Laser

Development of Hybrid Simulation for Supersonic Chemical Oxygen-Iodine Laser

High-efficiency chemical oxygen–iodine laser using a streamwise vortex generator

Spray generator of singlet oxygen with a centrifugal separation of liquid

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