Integrated numerical prediction of atomization process of liquid hydrogen jet

Ishimoto, Jun; Ohira, K.; Okabayashi, Kazuki; Chitose, Keiko

doi:10.1016/j.cryogenics.2008.03.006

Cited by 30 publications

(10 citation statements)

References 14 publications

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“…A large body of work in the open literature involves measurements and modeling of spray nozzle internal and external flows (Arcoumanis and Gavaises, 1998;Chen et al, 1998;Founti et al, 2007;Menard et al, 2007;Ishimoto et al, 2008;Som and Aggarwal, 2008;Strasser, 2008;Collazo et al, 2009;Fu et al, 2009). In general, many authors show a SMD / L C We Àx relation, where ''x'' ranges from 0.33 to 0.8, SMD is the Sauter mean droplet diameter, We is the Weber number (qU 2 L c /r), and L c is some characteristic length scale, often taken as the outer diameter D O shown in Fig.…”

Section: Atomizationmentioning

confidence: 99%

Towards the optimization of a pulsatile three-stream coaxial airblast injector

Strasser

2011

International Journal of Multiphase Flow

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Section: Atomizationmentioning

confidence: 99%

Towards the optimization of a pulsatile three-stream coaxial airblast injector

Strasser

2011

International Journal of Multiphase Flow

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“…Sussman and Puckett carried out the simulation of the jet breakup in Rayleigh mode using a coupled level‐set‐VOF approach. Ishimoto investigated a 3‐D structure of the liquid atomisation behaviour of an LH2 jet flow through a pinhole nozzle based on the LES‐VOF model in conjunction with the CSF model. These analysis focus on the thermodynamic effect on the consecutive breakup of a cryogenic liquid column, and the formation of a liquid film.…”

Section: Introductionmentioning

confidence: 99%

Numerical approaches and analysis of spray characteristics for pressuriser nozzles

et al. 2013

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Volume of fluid (VOF) method combined with primary breakup model (PBM) is developed to model large flow rate pressure-swirl nozzle used in pressuriser of the pressurised water reactor (PWR) power plant system. For the VOF model, the renormalisation-group (RNG) K-e model is selected to ensure the accuracy of simulation for swirling flows. The 3-D transient flow is simulated and the dynamic stability of the injection pattern is analysed for the nozzle. Based on the growth rate of the disturbance at the interface of the two phases, PBM is embedded in the VOF model in the form of user defined functions (UDF) to investigate the further breakup from sheet to spray drop and predict the spray drop size spectrum. In addition, experimental studies, considering the characteristics of mass flow rate, spray cone angle, spray flux distribution and drop size spectrum, were conducted to verify accuracy of the numerical results. The result of comparison shows that there is good agreement between the simulated results and the experimental data. Especially, the distribution tendency of the spray drop size simulated by PBM fits the experimental value well and the drop size corresponding to the maximum probability is predicted successfully. The present investigation shows that the VOF-PBM methodology can be applied to simulate the pressure-swirl nozzle and optimise design of spraying systems.

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“…The numerical simulation of a SN 2 particle and surrounding gaseous nitrogen (GN 2 ) flow composed of two immiscible fluids involves a combination of three tasks: 1) resolving the flow field, 2) updating the position of the interface and 3) resolving the cryogenic thermal field. The first task is completed by solving the Navier-Stokes equations taking into account the effect of the subgrid scale atomizing flow field by LES [8,9,10]. The second task is performed using the Volume of Fluid (VOF) method [11,12,13].…”

Section: Computational Study For Cooling Heat Transfer and Impingemenmentioning

confidence: 99%

Ultra-high heat flux cooling characteristics of cryogenic micro-solid nitrogen particles and its application to semiconductor wafer cleaning technology

Ishimoto¹,

Oh²,

Zhao³

et al. 2014

AIP Conference Proceedings

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Abstract. The ultra-high heat flux cooling characteristics and impingement behavior of cryogenic micro-solid nitrogen (SN 2 ) particles in relation to a heated wafer substrate were investigated for application to next generation semiconductor wafer cleaning technology. The fundamental characteristics of cooling heat transfer and photoresist removal-cleaning performance using micro-solid nitrogen particulate spray impinging on a heated substrate were numerically investigated and experimentally measured by a new type of integrated computational-experimental technique. This study contributes not only advanced cryogenic cooling technology for high thermal emission devices, but also to the field of nano device engineering including the semiconductor wafer cleaning technology.

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Integrated numerical prediction of atomization process of liquid hydrogen jet

Cited by 30 publications

References 14 publications

Towards the optimization of a pulsatile three-stream coaxial airblast injector

Towards the optimization of a pulsatile three-stream coaxial airblast injector

Numerical approaches and analysis of spray characteristics for pressuriser nozzles

Ultra-high heat flux cooling characteristics of cryogenic micro-solid nitrogen particles and its application to semiconductor wafer cleaning technology

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