Effect of channel and oxidizer injection slot width on the rotating detonation fueled by pre-combustion cracked kerosene

Zhong, Yun; Wu, Yun; Jin, Di; Chen, Xin; Yang, Xingkui; Wang, Shunli

doi:10.1016/j.actaastro.2019.09.034

Cited by 67 publications

(9 citation statements)

References 24 publications

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“…The reason is that the narrower channel would increase the initial pressure and the height of the fresh mixtures, which provides better conditions for the formation of the two-co rotating waves. Moreover, which is different from the previous study using 30% oxygen-enriched air as the oxidizer (no two-co rotating waves mode was observed), 26 the two-co rotating waves mode occurred with the 50% oxygen-enriched air in this study. This phenomenon demonstrates that the oxygen ratio of the oxidizer also influences the mode transition of the RDW.…”

Section: Modes Of the Rdwcontrasting

confidence: 99%

“…In this investigation, the channel width of the combustor was changed among the experiments to investigate its effect on the rotating detonation fueled by the pre-combustion cracked kerosene. It should be noted that this study was conducted based on the previous kerosene cracking reviews [22][23][24][25] and the rotating detonation studies [26][27][28] using the main gaseous components of the pre-combustion cracked kerosene and the pre-combustion cracked kerosene. Four kinds of channel widths were used, pre-combustion cracked kerosene and 50% oxygen-enriched air were taken as the propellant.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of rotating detonation fueled by pre-combustion cracked kerosene under different channel widths

Yang

Zhong

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part G:

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In this study, the effects of channel widths on the characteristics of the rotating detonation wave (RDW) were investigated. Pre-combustion cracked kerosene and 50% oxygen-enriched air were taken as the propellant. Keeping the outer diameter ( D = 150mm) constant, the channel widths ( W) of the combustor range from 15 mm to 50 mm in the experiments. The results indicate that the time for the formation of a stable RDW is longer under the wider channel, while the velocity of the RDW increases significantly with a wider channel. Increasing the ER has a positive effect on the wave velocity and the flow rate has little effect on wave velocity. The wave pressure increases under the higher ER and flow rate. Under the same flow rate and ER, the RDW pressure tends to reach the maximum value when the channel width is 25 mm, and the pressure range is 2 bar to 6 bar. Five kinds of the RDW modes were observed in the experiments, namely the failure “pop-out”, single-wave mode, two-counter rotating waves mode, and two-co rotating waves mode. The two-counter rotating waves mode seems to be an intermediate mode of single-wave mode and two-co rotating waves mode in the conducted experiments, and the multi-wave mode is more likely to occur under the narrower channel and the higher oxygen content.

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Section: Modes Of the Rdwcontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of rotating detonation fueled by pre-combustion cracked kerosene under different channel widths

Yang

Zhong

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…It was reported that the fuel liquid film formed by feeding with porous material works stably while conferring active thermal protection to the combustor wall. Zhong et al 32) evaluated the effects of the combustor flow path width and oxidizer slot width on the detonation wave formation time and detonation Trans. Japan Soc.…”

Section: Introductionmentioning

confidence: 99%

Visualization and Performance Evaluation of a Liquid-Ethanol Cylindrical Rotating Detonation Combustor

Ishihara

Yoneyama

Sato

et al. 2023

Trans. Japan Soc. Aero. S Sci.

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Rotating detonation combustors (RDCs) are among the combustors that use supersonic combustion waves known as detonation waves, and are expected to simplify engine systems and improve thermal efficiency due to their supersonic combustion and compression performance using shock waves. Research is also being actively conducted worldwide on a cylindrical RDC; a RDC without an inner cylinder, which is expected to simplify and downsize the combustor. However, most of the research was performed using gas propellants, and liquid propellants were rarely used. Since liquid propellants are used in many combustors, it is important to evaluate the performance of RDCs with liquid propellants. In this study, a cylindrical RDC with a liquid ethanol-gas oxygen mixture was constructed and tested at a flow rate of 31.5 « 5.0 g/s, an equivalence ratio of 0.46-1.39, and a back pressure of 14.5 « 2.5 kPa. The thrust was shown to depend strongly on the combustor bottom pressure history. In addition, the start-up process of the cylindrical RDC with liquid fuel was clarified by self-luminous and CH + radical visualizations. It was found that the detonation wavefront propagated at a distance of 2-3 mm from the combustor bottom, and the main combustion region was 10-15 mm in height.

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“…The effect of oxygen mass fraction (less than 40.5% to more than 43.6%) on wave propagation modes was investigated. Zhong [24,25] and Yang [26] used kerosene pre-combustion cracked gas and oxygen-enriched air (oxygen ratio of 50% and 30%) to achieve rotating detonation, and investigated the basic characteristics of the rotating detonation wave. Han et al [27] also conducted experiments on rotating detonation with kerosene-fuel-rich gas and oxygenenriched air and found that the minimum oxygen content that could successfully initiate and maintain the stable propagation of the detonation wave is 32%.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Propagation Characteristics of Kerosene/Air RDE with Different Diameters

Song

Zhou

et al. 2022

Energies

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A series of experimental tests were carried out in order to study the propagation characteristics of a liquid kerosene rotating detonation engine (RDE) with different diameters. Distinguished characteristics of spatial and temporal instability were found in the large-scale RDE due to the uneven circumferential distribution of kerosene supply pressure. As for the two counter-waves detonation system, the 500 mm-diameter RDE maintains a higher detonation wave velocity due to its longer injection recovery time. However, the 220 mm-diameter RDE can obtain a larger equivalence ratio operation range, higher specific thrust, and higher specific impulse. In addition, compared with the deflagration combustion, the detonation combustion has higher chamber pressure and thrust under the same operational conditions.

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Effect of channel and oxidizer injection slot width on the rotating detonation fueled by pre-combustion cracked kerosene

Cited by 67 publications

References 24 publications

Investigation of rotating detonation fueled by pre-combustion cracked kerosene under different channel widths

Investigation of rotating detonation fueled by pre-combustion cracked kerosene under different channel widths

Visualization and Performance Evaluation of a Liquid-Ethanol Cylindrical Rotating Detonation Combustor

Experimental Study on Propagation Characteristics of Kerosene/Air RDE with Different Diameters

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