Atomization of a liquid jet in supersonic crossflow in a combustion chamber with an expanded section

Zhao, Jingkai; Ren, Yongjie; Tong, Yiheng; Lin, Wen‐Wei; Nie, Wei

doi:10.1016/j.actaastro.2020.11.051

Cited by 33 publications

(4 citation statements)

References 46 publications

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“…Simulation results showed good agreement with the experimental results. Zhao et al (2021) performed experiments and simulations to investigate the spray, flow structure and droplet size distribution. Eulerian-Lagrangian approach with KH-RT breakup model was used for the simulations.…”

Section: Overview Of Research Studiesmentioning

confidence: 99%

Spray Breakup Modelling for Internal Combustion Engines

Sonawane

Ágarwal

2021

Energy, Environment, and Sustainability

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Rising concerns about emissions have led to a significant tightening of pollution norms for internal combustion (IC) engines. High-pressure direct injection (HPDI) technologies have been adopted for most on-road and off-road engines to meet the global demand for clean and efficient powertrains. Higher fuel efficiency, superior combustion, and lower pollutant formation are the characteristic features of the HPDI. The introduction of alternative fuels, modified combustion geometry, and novel combustion concepts demand continuous improvement in fuel injection equipment (FIE). The complicated physics of HPDI and its modelling is an active area of research among researchers and engine developers. Fuel-injected in the combustion chamber breaks up into a spray of fine droplets, evaporating, mixing with ambient air, and forming a fuel-air mixture, greatly affecting the engine combustion and emission characteristics. Therefore, it is necessary to study the fuel breakup phenomenon under different engine conditions comprehensively. Detailed understanding of the spray breakup phenomenon is unavailable due to difficulties in optical access, highly dense sprays, complex processes, etc. However, recent advances in measurement technologies and computational tools have made it feasible for researchers. This chapter attempts to capture widely used spray breakup models and research studies involving IC engines. Fundamental spray breakup and atomization have been discussed at the beginning of the chapter. Subsequently, the basis and fundamentals of popular spray models have been discussed. Finally, the authors have comprehensively discussed the key contributions in sprays to provide an overall idea about the spray models and their application for IC engine studies. Various spray breakup models such as Blob Model, Linear Instability Sheet Atomization (LISA) Model, Kelvin-Helmholtz (KH) Model, Kelvin-Helmholtz-Aerodynamics Cavitation Turbulence (KH-ACT) Model, RT (Rayleigh-Taylor) Model, Hybrid/Modified Kelvin-Helmholtz Rayleigh-Taylor (KH-RT) Model, Taylor Analogy Breakup (TAB) Model, Enhanced TAB breakup model (ETAB) are discussed briefly in this chapter. Towards the end, a summary of the contents of the chapter is provided, which covers highlights and significant observations.

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Section: Overview Of Research Studiesmentioning

confidence: 99%

Spray Breakup Modelling for Internal Combustion Engines

Sonawane

Ágarwal

2021

Energy, Environment, and Sustainability

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“…Jet penetration is critical to characterize the atomization characteristics of the transverse liquid jets. Some scholars [5][6][7][8][9][10] introduced one or more of the Weber number, density ratio, pressure ratio, Reynolds number, temperature ratio, and other parameters into the empirical fitting formula, and carried out a lot of research work, but did not get a unified fitting formula.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the atomization of transverse liquid jet

Fu,

Lu,

Xiao

et al. 2024

J. Phys.: Conf. Ser.

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The transverse liquid jet is widely used in gas-steam ejection, scramjet engines, and other engineering applications. The research of transverse liquid jets can provide a basis for product design and has a wide range of engineering application value. A high-temperature and high-pressure jet experimental system was designed according to the characteristics of the cooling water jet atomization in the gas-steam ejection power system. The high-speed photography method was used to obtain the macroscopic structural characteristics of the transverse liquid jet. In this paper, experimental research of liquid jets under three conditions was carried out. The trajectory curve of the liquid jet considering momentum ratio and temperature is as follows: y/dj = 2.782q 0.422(x/dj )0.307(T/T0 )-0.785. It can provide theoretical support for improving the efficiency of gas-liquid mixing in power systems, engines, etc.

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“…Some studies have shown that the activity of liquid fuels is low; therefore, it is necessary to add a certain percentage of high-activity gaseous fuels to liquid fuels [14,15] or to adopt oxygen-enriched [16][17][18] and preheating [19][20][21] methods to accelerate the evaporation and atomization of the liquid fuels. Adopting atomizers [22][23][24] is another common method to improve fuel atomization and mixing. Frolov et al [25] fabricated a one-meter-long pre-detonator and an air-assisted atomizer to initiate the detonation in the main detonation tube.…”

Section: Introductionmentioning

confidence: 99%

Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

Huang,

Wang,

Shi

et al. 2024

Energies

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Traditional exhaust-gas turbocharging exhibits hysteresis under variable working conditions. To achieve rapid-intake supercharging, this study investigates the synergistic coupling process between the detonation and diesel cycles using gasoline as fuel. A numerical simulation model is constructed to analyze the detonation characteristics of a pulse-detonation combustor (PDC), followed by experimental verification. The comprehensive process of the flame’s deflagration-to-detonation transition (DDT) and the formation of the detonation wave are discussed in detail. The airflow velocity, DDT time, and peak pressure of detonation tubes with five different blockage ratios (BR) are analyzed, with the results imported into a one-dimensional GT-POWER engine model. The results indicate that the generation of detonation waves is influenced by flame and compression wave interactions. Increasing the airflow does not shorten the DDT time, whereas increasing the BR causes the DDT time to decrease and then increase. Large BRs affect the initiation speed of detonation in the tube, while small BRs impact the DDT distance and peak pressure. Upon connection to the PDC, the transient response rate of the engine is slightly improved. These results can provide useful guidance for improving the transient response characteristics of engines.

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Atomization of a liquid jet in supersonic crossflow in a combustion chamber with an expanded section

Cited by 33 publications

References 46 publications

Spray Breakup Modelling for Internal Combustion Engines

Spray Breakup Modelling for Internal Combustion Engines

Experimental research on the atomization of transverse liquid jet

Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

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