COIL technology development at Boeing

Hurlock, S. C.

doi:10.1117/12.465767

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…However, with further F Cl 2 increase, Y Á decreases sharply to $50% and even to $31% when F Cl 2 decreases to 36.6 mmol/s. By comparing with the typical data of the jet SOG normally used in current chemical oxygen iodine laser (Y Á % 65%, U Cl 2 % 90%, P Á % 12 Torr), 16) it is apparent that CFSOG is superior to jet SOG in both U Cl 2 and P Á . The most significant advantage of CFSOG is the exceedingly high Cl 2 utilization.…”

Section: Performance Of Cfsogmentioning

confidence: 96%

Experimental and Theoretical Study of Centrifugal Flow Singlet Oxygen Generator

Shi

Deng

Yang

et al. 2008

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We designed and realized a novel centrifugal flow singlet oxygen generator (CFSOG) that was originally proposed by Emanuel [Proc. SPIE 5448 (2004) 233]. In this device, singlet oxygen O2(1Δ) is generated by the reaction of gaseous Cl2 with aqueous basic hydrogen peroxide (BHP) that flows rapidly along an arc-shaped concave to form a rotating liquid layer, so that the nascent O2(1Δ) generated in the liquid phase will be separated from it quickly to suppress the collision quenching loss of O2(1Δ) with the help of the enormous centrifugal force produced by the rotating fluid. Our preliminary experiment shows that, because the specific reactive surface area of this novel singlet oxygen generator (SOG) is much larger than that of the jet-type SOG normally used in current chemical oxygen–iodine laser (COIL), enhanced performance of O2(1Δ) yield ∼60%, O2(1Δ) partial pressure ∼31 Torr, and an extremely high chlorine utilization within 96–98% have been realized.

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Section: Performance Of Cfsogmentioning

confidence: 96%

Experimental and Theoretical Study of Centrifugal Flow Singlet Oxygen Generator

Shi

Deng

Yang

et al. 2008

jjap

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“…COIL is a scalable and highly potential laser source amongst various other high power laser sources [1][2] . In COIL, chlorine gas reacts with liquid reagent i.e.…”

Section: Introductionmentioning

confidence: 99%

Real Time Flow Control System for Precise Gas Feed in COIL

2022

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This paper reports development of a real time flow control system for precise, controlled and uniform gas feed to a flowing medium Chemical Oxygen Iodine Laser (COIL). The optimal operation of this prominent laser depends upon the desired supply of gas constituents such as nitrogen (N2), chlorine (Cl2) and iodine (I2) to achieve adequately mixed laser gas. The laser also demands real time variation of flow rates during gas constituent transitions in order to maintain stabilized pressures in critical subsystems. Diluent nitrogen utilized for singlet oxygen transport is termed as primary buffer gas and that for iodine transport is termed as secondary buffer gas (with main and bypass components). Also, nitrogen in precise flows is used for mirror blowing, nozzle curtain, cavity bleed and diffuser startup. A compact hybrid data acquisition system (Hybrid DAS) for precise flow control using LabVIEW 2014 platform has been developed. The supported flow ranges may vary from few mmole.s-1 to few hundred mmole.s-1. The estimated relative uncertainty in the largest gas component i.e. primary buffer gas feed is nearly 0.7%. The implementation of in-operation variation using flow ramp enables swift stabilization of singlet oxygen generator pressures critical for successful COIL operation. The performance of Hybrid DAS is at par with fully wired DAS providing the crucial benefit of remote field operation at distances of nearly 80m in line of sight and 35m with obstacles

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“…Hurlock showed that since iodine is premixed with the high-pressure nitrogen flow, this nozzle concept requires a high-pressure iodine supply system. 4) In addition, rapid expansion of the high-pressure I 2 /N 2 flow caused iodine condensation. Marshall et al recently proposed an iodine cluster buster with wires.…”

Section: Introductionmentioning

confidence: 99%

Ejector Chemical Oxygen–Iodine Laser with Supersonic Nozzle Bank Based on a Trip-Jet Mixing System

Tei

Horioka

Nakajima

et al. 2008

jjap

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Motivated by application to quantum physics, anticommuting analogues of Wiener measure and Brownian motion are constructed. The corresponding Itô integrals are defined and the existence and uniqueness of solutions to a class of stochastic differential equations is established. This machinery is used to provide a Feynman-Kac formula for a class of Hamiltonians. Several specific examples are considered.

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COIL technology development at Boeing

Cited by 12 publications

References 2 publications

Experimental and Theoretical Study of Centrifugal Flow Singlet Oxygen Generator

Experimental and Theoretical Study of Centrifugal Flow Singlet Oxygen Generator

Real Time Flow Control System for Precise Gas Feed in COIL

Ejector Chemical Oxygen–Iodine Laser with Supersonic Nozzle Bank Based on a Trip-Jet Mixing System

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