Flashing injection of high temperature hydrocarbon liquid jets

Jin, Youngho; Lee, Hyung Ju; Hwang, Ki-Young; Park, Dong-Chang; Min, Seongki

doi:10.1016/j.expthermflusci.2017.09.016

Cited by 23 publications

(2 citation statements)

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“…Moreover, the different effects of flash boiling on spray parameters for different injection pressures reported for high-pressure systems [9] may suggest that the spray collapse could be also dependent on the injection pressure. The study of Jin et al [12] on hydrocarbon liquid jets formed at low injection pressures (up to 0.9 MPa) showed that the discharge coefficient, which was related to the effects of internal cavitation and flash boiling, decreased faster for lower injection pressures. Moreover, at fuel temperatures higher than the boiling point, the spray atomisation was primarily dependent on the Rp.…”

Section: Introductionmentioning

confidence: 99%

“…In that regime, with increasing the Rp parameter, the spray penetration was increased, and the spray width was decreased [8]. Xu et al [9] performed experiments on droplet size reduction by flash boiling for different injection pressures (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). They observed that increasing the Rp in the transitional flashboiling regime reduced the droplet size faster for lower injection pressure.…”

Section: Introductionmentioning

confidence: 99%

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Spray collapse in low-pressure injection systems operating in flash-boiling conditions

Kapusta

2021

ICLASS

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Flash-boiling sprays formed by initially separated plumes, under a high degree of overheating, may collapse into a single spray cloud; leading to increases in the spray penetration and narrowing of the spray angle. This effect is not only dependent on the degree of overheating, but also on the number of nozzles. It is important to note that these, and most of the other observations related to flashing sprays were made for high-pressure systems. In this study, the spray collapse process is investigated for low injection pressure in order to verify if the effects of the flash boiling on spray formation will be dependent on the number of nozzles, as was observed for high-pressure sprays. For this purpose, the water sprays formed by a commercial six-hole injector were compared with the results obtained for a two-hole injector. The sprays were analysed in terms of global spray structure and global spray parameters, such as the spray penetration and the spray angle. The sprays did show major differences, and both collapsed at the highest considered temperature. However, in the case of the six-hole injector the collapse was noticed also for lower temperatures. Despite the collapse, no considerable increase in penetration was observed in any of the cases.

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Section: Introductionmentioning

confidence: 99%