Vaporization of Liquid Oxygen (LOX) Droplets in Hydrogen and Water Environments under Sub- and Super-Critical Conditions

Lafon, Patrick; Meng, Hua; Yang, Vigor; Habiballah, Mohammed

doi:10.1080/00102200701486873

Cited by 29 publications

(32 citation statements)

References 34 publications

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“…[20][21][22]. The numerical methodologies used in this framework has been applied to a variety of numerical studies in the context of liquid-rocket applications, including the vaporization, mixing and combustion of liquid droplets at supercritical conditions [23][24][25][26][27][28][29], cryogenic fluid injection, mixing and combustion for both shear coaxial and swirl injectors [30][31][32][33][34][35][36]. Turbulence closure is achieved by means of a LES technique, in which large-scale motions are calculated explicitly and the effects of unresolved small-scale turbulence are modeled either analytically or empirically.…”

Section: Les Methodsmentioning

confidence: 99%

High flowrate injector with gaseous hydrogen and gaseous oxygen

Wang

Cai

Gao

et al. 2011

Sci. China Technol. Sci.

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In order to get a high flowrate gas-gas injector and its design methodology, the combustion flow field of a typical shear-coaxial injector was analyzed firstly. The dimensional analysis was applied in the phenomenon of gas-gas combustion, and design parameter optimization and a structure improvement were also carried out. A high flowrate single-element injector with high H 2 /O 2 momentum ratio and tapered O 2 post tip was obtained and validated by both numerical and experimental studies. This high flowrate injector has simple construction and it can effectively enhance the mixing, decrease the combustion completion length and also has a benign heat environment. Furthermore, based on the study of the single-element injector, numerical optimization and validation experiments were conducted successively on a multi-element injector equipped with high flowrate injection elements. The multi-element injector with the high flowrate elements started up and shut down smoothly, and operated steadily without any stability aids. In the combustor designed with nominal parameters, this injection element can obtain high combustion efficiency with a flowrate of 3.7 times that of SSME main injector element and shows a benign chamber wall heat compatibility. This injector design and the design methodology can become a reference for the design of other types of injectors for liquid rocket engines. liquid rocket engine, gas-gas injector, shear-coaxial injector,, Large Eddy Simulation, subscale combustor, experiment Citation: Wang X W, Cai G B, Gao Y S, et al. High flowrate injector with gaseous hydrogen and gaseous oxygen.

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Section: Les Methodsmentioning

confidence: 99%

High flowrate injector with gaseous hydrogen and gaseous oxygen

Wang

Cai

Gao

et al. 2011

Sci. China Technol. Sci.

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“…In these two equations, the Soret and Dufour effects are omitted because of their negligible influence on the vaporization phenomena [12].…”

Section: Theoretical Formulations and Numerical Treatmentmentioning

confidence: 99%

“…A robust and efficient treatment based on the irreversible thermodynamic theorem is further developed to handle the other thermodynamic equilibrium conditions and the conservation of energy and species across the droplet surface [12]. For example, the following expression is employed for treating the species transport across the interface:…”

Section: Theoretical Formulations and Numerical Treatmentmentioning

confidence: 99%

“…The droplet-in-bubble approach is incorporated into a well-validated droplet vaporization numerical scheme previously developed for treating droplet vaporization at high pressures [12]. The formulation is based on a complete set of conservation equations of mass, momentum, energy, and chemical species in a spherical coordinate system for both liquid and gaseous phases.…”

Section: Theoretical Formulations and Numerical Treatmentmentioning

confidence: 99%

“…Both sub-and supercritical conditions are treated. A droplet-in-bubble approach [19], which is suitable for solving droplet vaporization in a dense droplet cluster, is incorporated into a well-established droplet vaporization model [12], which accommodates a selfconsistent treatment of high-pressure phenomena, including thermodynamic non-idealities, transport anomalies, and transient behaviors. The effects of the ambient pressure and temperature on the LOX droplet vaporization rate in a dense cluster environment are explored in detail.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clustering effects on liquid oxygen (LOX) droplet vaporization in hydrogen environments at subcritical and supercritical pressures

Meng

Yang

2012

International Journal of Hydrogen Energy

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Hydrogen Combustion and Emissions in a Sustainable Energy Future

Briones¹

2010

Handbook of Combustion

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The global energy landscape is undergoing a transformation driven by rising energy demand, diminishing fossil fuel supplies, deregulation of energy industry, and growing concern about climate change. While fossil fuels will continue to play a dominant role in meeting the current and future energy needs, there is worldwide interest in developing renewable and alternative energy sources to meet the growing energy demand and address concerns about the emission of greenhouse gases and hazardous pollutants. In this context, hydrogen is viewed as a viable renewable energy carrier due to its abundant supply, superior emission characteristics, and flexibility in harnessing its energy through a variety of technologies. There are, however, many technological and scientific issues pertaining to its production, storage, and utilization. This chapter provides an overview of such issues and discusses research dealing with hydrogen combustion and emissions in the context of sustainable energy future. Studies concerning laminar flames, including non‐premixed, premixed, and partially premixed flames in various configurations, and also those dealing with ignition and extinction phenomena, are reviewed. High‐pressure phenomena including explosions/ignition limits are discussed, and an overview of detonation and turbulent combustion is provided. Issues pertaining to hydrogen combustion and emissions in practical systems are also discussed. Further technological advances and fundamental research needed for hydrogen to play a major role in the sustainable energy future are identified.

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Vaporization of Liquid Oxygen (LOX) Droplets in Hydrogen and Water Environments under Sub- and Super-Critical Conditions

Cited by 29 publications

References 34 publications

High flowrate injector with gaseous hydrogen and gaseous oxygen

High flowrate injector with gaseous hydrogen and gaseous oxygen

Clustering effects on liquid oxygen (LOX) droplet vaporization in hydrogen environments at subcritical and supercritical pressures

Hydrogen Combustion and Emissions in a Sustainable Energy Future

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