Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters

Du, Wei; Zhang, Qiankun; Li, Meng; Hou, Jinchi

doi:10.2298/tsci190118169d

Cited by 3 publications

(2 citation statements)

References 43 publications

(45 reference statements)

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“…Therefore, it is crucial to investigate the spray characteristics of the pressure swirl nozzle at low flow rates to understand the ignition performance of the auxiliary power device and enhance aviation engine safety [2] .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the spray characteristics of low mass flow pressure swirl nozzles

Zhang,

Kai,

et al. 2024

Preprint

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Pressure swirl nozzles with small mass flow are severed as starting nozzles and their spray characteristics directly affect the ignition performance in the combustion chamber. In order to adapt to different combustion chambers and to clarify the spray laws of nozzles with different spray cone angles, experimental studies have been carried out on the spray cone angle, the breakup length, the droplet velocity field, and the droplet size distribution characteristics for two nozzles. The results show that with the increase in injection pressure, the spray cone angle increases and then tends to slow down, the liquid film breakup length and droplet size decreases, the droplet velocity decreases as the increase in axial distance, the droplet velocity decay rate of the outside of the cone is higher than that of the droplets at the center axis position. Under the same working conditions, as the spray cone angle increases, the sprayed droplet size decreases but its uniformity improves, and the droplet velocity near the center axis of the spray field of the smaller spray angle cone nozzle increases significantly. From a theoretical point of view, it is shown that the conical liquid film breakup length becomes smaller for nozzles with large spray cone angles at the same flow rates.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the spray characteristics of low mass flow pressure swirl nozzles

Zhang,

Kai,

et al. 2024

Preprint

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“…They found that the rotation mode in the swirl flame is primary under stable conditions, while three modes of the flame dynamics, including vibration, rotation, and flame shedding, can be found at near-lean blowout conditions. Du et al [24] examined the ignition performance of RP-3 spray under wall-impinged conditions. They found that a low temperature wall will prolong the spray ignition delay, but a low injection pressure at small injection quantities can shortening the ignition delay.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Auto-Ignition Characteristics of Kerosene Spray Flames

et al. 2022

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To facilitate the better use of RP-3 kerosene in compression ignition engines, the auto-ignition behaviors of RP-3 kerosene spray were experimentally investigated in an optical rapid compression machine. Results show that most of the tests have good ignitability and combustion performance. For all the successful ignited cases, the flame kernel was found to be formed before the steep rise of pressure, which explained that image-based ignition delay time is always shorter than the pressure-based ignition delay time. The effects of ambient environment, injection pressure, and injection delay time on the pressure history, ignition intensity, combustion duration, heat release rate, and other parameters were investigated individually. The ambient environment has a strong influence on ignition delay time by accelerating the chemical reactions, whereas the high injection pressure helps the better vaporization of fuel spray. The effect of injection delay time is non-monotonic as the trade-off relation between heat loss and blending of fuel and oxygen. The heat release rate histories under different conditions were compared and analyzed, and the two-stage heat release phenomenon was observed in the negative temperature coefficient region. The ignition intensity region was determined based on the measured ignition delay times of RP-3 kerosene spray, and multiple linear regression correlation was used to study the ignition delay time sensitivity to multi-factors.

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The significance of evaporation heat and mass transfer through a spray sheet with two-phase transitional momentum transport and vapour dispersion

Majhool,

Hadi,

Alqurashi

et al. 2025

International Journal of Thermofluids

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Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters

Cited by 3 publications

References 43 publications

Experimental study on the spray characteristics of low mass flow pressure swirl nozzles

Experimental study on the spray characteristics of low mass flow pressure swirl nozzles

Experimental Investigation on Auto-Ignition Characteristics of Kerosene Spray Flames

The significance of evaporation heat and mass transfer through a spray sheet with two-phase transitional momentum transport and vapour dispersion

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