Investigation on the propagation process of rotating detonation wave

Deng, Li; Ma, Haitao; Xu, Can; Zhou, Changsheng; Liu, Xiao

doi:10.1016/j.actaastro.2017.07.024

Cited by 43 publications

(7 citation statements)

References 35 publications

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“…Depending on the reactant properties, injection conditions, and geometric characteristics of the annular combustor, one or multiple detonation wavelets can spin in the annular combustor. The propagation mode of these wavelets could also be unsteadyshifting instantaneously from one pattern to another, under some conditions, in a chaotic fashionas observed in both experimental and numerical results [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. The propulsive performance of RDEs has also been evaluated in some previous studies [34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 73%

Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine

Yan

Teng

2021

Acta Astronautica

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Section: Introductionmentioning

confidence: 73%

Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine

Yan

Teng

2021

Acta Astronautica

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“…Seen from Figure 9(b), the average pressure of the RDW is 3.51 bar and there is a small step area before the steep rising edge of the pressure signal. The reason for this phenomenon is that the detonation combustion products are over-expanded under the action of the central expansion fan, 41 which induces pressure difference of the static pressure at the outlet of the combustor and the back pressure. To balance the pressure difference, an oblique shock wave extending from the outlet into the combustion chamber, and the step area is generated before the steep rising edge of the pressure signal.…”

Section: Modes Of the Rdwmentioning

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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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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“…Therefore, many researchers have conducted in-depth analysis on the propagation mode and characteristics of RDW. Due to the high activity and easy initiation of gaseous fuels, a series of RDW experimental study using hydrogen, methane and other gases as fuels have been carried out [3][4][5], and single wave model [6][7][8], two-counter RDW model [9,10], single and double wave mixing model [11,12], multi wave mode [11][12][13] have been observed. In addition, there are a lot of numerical simulation work to conduct in-depth research on the flow field characteristics of RDW generated by gaseous fuel, and analyze in detail the change of flow field state from ignition to stabilization [14,15].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on propagation characteristics of rotating detonation wave of liquid kerosene with oxygen-enriched air

Han

Zheng

Huang

et al. 2023

J. Phys.: Conf. Ser.

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In order to study the propagation characteristics of rotating detonation wave (RDW) of liquid fuel, an experimental study was carried out with liquid kerosene at room temperature as fuel and oxygen-enriched air with oxygen volume fraction of 38.5% as oxidant in this paper. RDW with equivalence ratio in the range of 0.65~0.9 was successfully obtained by controlling kerosene mass flow, and a detailed analysis of propagation characteristics of RDW was carried out. The results show that with the increase of equivalence ratio, the propagation state of RDW gradually changes from the premature flameout of discontinuous detonation to the complete operation of continuous detonation. The flow blockage of the injectors will further worsen the mixing effect under low equivalence ratio conditions, resulting in the discontinuous detonation phenomenon of repeated flameout-initiation process in the combustion chamber. In this study, almost all detonation waves operate in two-counter RDW mode, except that there is a single wave mode in a short period after flameout-initiation process.

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Investigation on the propagation process of rotating detonation wave

Cited by 43 publications

References 35 publications

Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine

Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine

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

Experimental study on propagation characteristics of rotating detonation wave of liquid kerosene with oxygen-enriched air

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