An experimental study on the spray characteristics of splash platelet injector

Yin, Liang; Jiaqiang, E; Ding, Jie; Li, Yelin

doi:10.1016/j.actaastro.2021.01.046

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…For example, when the rocket engine is fired, it can ensure that the propellant flow in the pipeline rapidly changes from the gas phase to the liquid phase [3]. The chilling determines the spray characteristics of the engine injector and directly affects the engine starting process [4]. During the chill-down process, the temperature of the pipeline system drops sharply to obtain the chilling, and the cryogenic propellant completes the filling of the pipeline and establishes steady flow.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Flow Development and Boiling Transitions in the Liquid Oxygen Chill-Down Process in a Straight Horizontal Exit-Contracted Pipe

Chen

Zhang

2023

International Journal of Aerospace Engineering

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Liquid oxygen chill-down in a straight horizontal pipe was studied experimentally. The effect of the entrance corner was excluded, and much denser wall temperature sensors along the pipe have been set compared to the present studies. In this way, the chill-down process, as well as the development of the flow pattern, has been drawn for every test. As a result, the mechanism of LO2 chill-down would be obtained for various pressure sections. For cases with stable pressure below 1.25 MPa, liquid rewetting in the pipe is controlled by the propagation of quenching fronts. For cases with a higher pressure, liquid rewetting in the second half of the pipe is controlled by the sudden liquid fill-in. Based on the transition points obtained, heat transfer coefficients on the Leidenfrost point and critical heat flux have been correlated for various pressure sections using new approaches. Conclusions show that the correlation equations are dependent on the chill-down mechanisms.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Flow Development and Boiling Transitions in the Liquid Oxygen Chill-Down Process in a Straight Horizontal Exit-Contracted Pipe

Chen

Zhang

2023

International Journal of Aerospace Engineering

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Spray behaviour of hydro-treated ester fatty acids fuel made from used cooking oil at low injection pressures

Azam,

Sulaiman,

Abd Razak

et al. 2023

Aeronaut. j.

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The spray characteristics significantly affected the combustion performance. The injection pressure and fuel properties are factors that affect the spray cone angle, penetration, and droplet distribution. Although substantial research has been conducted on spray attributes, understanding the complex biofuel spray dynamics in real nozzles and injectors is crucial. This study examines hydro-processed esters and fatty acid (HEFA) spray characteristics of used cooking oil and palm oil biodiesel in a constant-volume chamber. The study was performed by varying the injection pressures ranging from 30 to 120psi for pure fuels and Jet A-1 blends. Experiments were conducted at standard sea-level atmospheric pressure and an ambient temperature of ±297K using an airblast fuel injector. The initial fuel temperature was set at ±302K. Jet A-1 was used as the baseline fuel for the comparative analysis. Particle image velocimetry (PIV) was employed to visualise the microscopic and macroscopic characteristics of the fuel spray. The results revealed a progressive increase in the penetration length corresponding to an increase in the injection pressure. Lower pressures yielded non-uniform particle distributions across the spray area, whereas cone angle augmentation stabilised at elevated pressures. A blend of 60% Jet A-1 and 40% HEFA closely matched Jet A-1 characteristics, indicating alternative aviation fuel potential. These real-time insights into spray behaviour are critical for enhancing the fuel efficiency and mitigating the generation of particulate emissions resulting from spray combustion.

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Numerical Investigation of the Combustion Characteristics of GO2/GCH4 Splash Platelet Injector

2022

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An experimental study on the spray characteristics of splash platelet injector

Cited by 3 publications

References 14 publications

Characteristics of Flow Development and Boiling Transitions in the Liquid Oxygen Chill-Down Process in a Straight Horizontal Exit-Contracted Pipe

Characteristics of Flow Development and Boiling Transitions in the Liquid Oxygen Chill-Down Process in a Straight Horizontal Exit-Contracted Pipe

Spray behaviour of hydro-treated ester fatty acids fuel made from used cooking oil at low injection pressures

Numerical Investigation of the Combustion Characteristics of GO2/GCH4 Splash Platelet Injector

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