Droplet Vaporization In High-Pressure Environments I: Near Critical Conditions

Hsieh, K. C.; Shuen, Jian-Shun; Yang, Vigor

doi:10.1080/00102209108951705

Cited by 140 publications

(53 citation statements)

References 22 publications

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“…Studies on droplet evaporation at high pressures have been reported by several authors [1][2][3]. Several investigators [4][5][6][7][8][9][10][11][12], have addressed the problem of gas solubility in their research works on high pressure droplet vaporization. Nomura et al [13] have measured experimentally the temporal variation of (d / d 0 ) 2 for an n-heptane droplet at different ambient pressures and temperatures under microgravity conditions.…”

Section: Introductionmentioning

confidence: 99%

Subcritical and supercritical droplet evaporation within a zero-gravity environment: Low Weber number relative motion

Zhang

Raghavan

Gogos

2008

International Communications in Heat and Mass Transfer

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A validated comprehensive axisymmetric numerical model, which includes the high pressure transient effects, variable thermo-physical properties and inert species solubility in the liquid phase, has been employed to study the evaporation of moving n-heptane droplets within a zero-gravity nitrogen environment, for a wide range of ambient pressures and initial freestream velocities. At the high ambient temperature considered (1000 K), the evaporation constant increases with the ambient pressure. At low ambient pressure, the evaporation constant becomes almost a constant during the end of the lifetime. At high ambient pressures, the transient behavior is present throughout the droplet lifetime. The final penetration distance of a moving droplet decreases exponentially with increasing ambient pressure. The average evaporation constant increases with ambient pressure. The variation is almost linear for reduced ambient pressures smaller than approximately 2. For higher values, depending on the initial freestream velocity, the average evaporation constant either becomes a constant (at low initial freestream velocities) or it non-linearly increases (at high initial freestream velocities) with the ambient pressure. Droplet lifetime decreases with increasing ambient pressure and/or increasing initial freestream velocity.

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Section: Introductionmentioning

confidence: 99%

Subcritical and supercritical droplet evaporation within a zero-gravity environment: Low Weber number relative motion

Zhang

Raghavan

Gogos

2008

International Communications in Heat and Mass Transfer

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“…For a binary mixture, the partial molar properties in terms of the mole fraction of the first As being demonstrated in the early works regarding high-pressure droplet vaporization and combustion (Manrique and Borman, 1969;Hsieh et al, 1991), in order to find faithful results, the properties of each component in a non-ideal mixture have to be calculated based on the partial molar properties. In a general CFD code, all flow properties are derived in a mass or density based manner, which rends the evaluation of partial molar properties inconvenient.…”

Section: )mentioning

confidence: 99%

Liquid-Propellant Rocket Engine Injector Dynamics and Combustion Processes at Supercritical Conditions

Yang¹

2004

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“…For instance, the phase change and interfacial transport processes associated with transcritical and supercritical droplet vaporization involve subcontinuum scales, and, therefore, require phenomenological models [1][2][3][4] for their representation in a continuum approach. While such models may be appropriate to simulate droplet vaporization under subcritical conditions, they become questionable under transcritical/supercritical conditions.…”

Section: Introductionmentioning

confidence: 99%