Experimental research on ignition, quenching, reinitiation and the stabilization process in rotating detonation engine

Ma, Zhiyi; Zhang, Shujie; Luan, Ming-Yi; Yao, Songbai; Xia, Zhi-Jie; Wang, Jianping

doi:10.1016/j.ijhydene.2018.08.064

Cited by 70 publications

(12 citation statements)

References 26 publications

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“…The injector conditions ( p i , T i , and v i ) were computed assuming an isentropic expansion through the micro-nozzles into the combustor . 42 An inflow condition, based on the isentropic expansion relation, was widely used because of its simplicity and ability to capture the main features of the combustion dynamics in the RDCs (e.g., Refs 8,42,43). The same was used in this study as well.…”

Section: Methodsmentioning

confidence: 99%

Numerical analysis on evolution process of multiple rotating detonation waves with ethylene–oxygen–nitrogen mixture

Meng

Wang

Xiao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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Two-dimensional numerical simulations of a rotating detonation combustor (RDC) fueled by ethylene–oxygen–nitrogen were performed to investigate the evolution process of multiple rotating detonation waves (RDWs), that is, initial chaotic stage, self-adjustment stage, and the final stable stage. The number of stable RDWs corresponding to the initial conditions was in good agreement with that predicted by an empirical model proposed by Daniau et al. from Lavrenty’ev Institute of Hydrodynamics (LIH). From the simulation results, the spontaneous formation of a reverse RDW and the transition of trailing waves to detonation waves contribute to the emergence of the chaotic stage. The self-adjustment stage comprises three distinctive parts, which are the self-adjustment of the propagation direction, the number, and the propagation characteristics of RDWs. Furthermore, the double-wave collision was found to play a significant role in modulating the propagation direction as well as the number of RDWs. The same self-adjusting trend of different instantaneous propagation characteristics (e.g., peak pressure, propagation velocity, and wave front height) of the RDWs was observed, suggesting the self-similarity property of the adjusting mechanism demonstrated in the evolution of rotating detonation dynamics.

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Section: Methodsmentioning

confidence: 99%

Numerical analysis on evolution process of multiple rotating detonation waves with ethylene–oxygen–nitrogen mixture

Meng

Wang

Xiao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Namely, zone 00 cannot be the high temperature zone. Therefore, an equivalent expansion slope is proposed to overcome the problem, given by dσ dx = k ex (11) where k ex denotes the expansion slope. To model the expansion in RDEs, the equivalent expansion slope needs to be extracted from the numerical results and will be discussed later in this paper.…”

Section: Physical Modellingmentioning

confidence: 99%

“…The potential thermodynamic advantages of detonation make RDEs one of the most promising propulsion systems for use in aircraft and rocket engines. The basic concept of RDEs was first introduced by Voitsekhovskii [1] and research on RDEs are now being conducted in several laboratories around the world, including in Russia [2,3], Poland [4], the US [5,6], France [7,8], Japan [9] and China [10,11]. Furthermore, many initial numerical studies have been performed on topics such as the basic physics [12][13][14], detailed mechanism [15][16][17], thermodynamic analysis [18,19], and performance [16].…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical study of the expansion effect on the velocity deficit of rotating detonation waves

Luan

Zhang

Xia

et al. 2020

Combustion Theory and Modelling

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In this work, a quasi-one-dimensional ZND model of detonation considering the expansion process perpendicular to the detonation propagation direction is extended to the rotating detonation engine (RDE) to investigate the influence of expansion on the detonation waves in RDEs. This model is first used in more general cases of onedimensional detonation waves, coupled with the one-and two-step kinetic models for stoichiometric hydrogen-air mixtures. The expansion has an effect on reducing the detonation propagation speed and can be attributed to two factors: the extra work during expansion and the lost heat released behind the sonic point. The one that plays the more important role depends on the kinetic model. Finally, a set of numerical simulations of RDEs are performed for comparison with the theoretical model. The results show that the expansion process in RDEs reduces the speed of the detonation wave by approximately 5%, which is an important factor for the detonation velocity deficit in two-dimensional simulations.

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“…Recently, RDCs with different fuels have been realized in experiments [3][4][5]. Pressure signal in RDCs can be get by high-frequency pressure sensors [6][7][8][9][10][11][12][13][14]. Wave information in RDCs could be get from pressure signal.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, numerical simulations for RDCs were carried out [17][18][19][20][21][22]. Some phenomena discovered in experiments were reproduced in simulation Energies 2021, 14, 8296 2 of 14 and their mechanisms were explained, such as reinitiation [12,17] and delay time after ignition [7,13,16]. In convection simulations for RDCs, gas is injected through the whole injection wall, but the actual condition is that gas is injected by micro-nozzles distributed on the injection wall.…”

Section: Introductionmentioning

confidence: 99%

Effects of Reversed Shock Waves on Operation Mode in H2/O2 Rotating Detonation Chambers

Chen

Wang

2021

Energies

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Operation modes are an important topic in the research of Rotating Detonation Chamber (RDC) as it can affect the stability of RDC. However, they have not been discussed in detail due to the limitation of measurement means in experiments. The aim of this research is to investigate the mechanism of different operation modes by numerical simulation. In this paper, a numerical simulation for RDCs with separate injectors is carried out. Different operation modes and mode switching are analyzed. There is a series of reversed shock waves in the flow field. It was found that they have great effects on operation mode and mode switching in RDCs. A reversed shock wave can transit into a detonation wave after passing through isolated fresh gas region where fresh gas and burnt gas distribute alternatively. This shock-to-detonation transition (SDT) phenomenon will influence the ignition process, contra-rotating waves mode and mode switching in RDCs. SDT makes the number of detonation wave increases, resulting in multi-wave mode with one ignition. Moreover, quenching of detonation waves after collision and SDT after passing through isolated fresh gas region are the mechanism of contra-rotating waves mode in RDCs with separate injectors. In addition, when the inlet total temperature increases, a shock wave is easier to transit into a detonation wave. The distance that a shock wave travels before SDT decreases when temperature increases. This will result in mode switching. Therefore, SDT determines that there is a lower bound of detonation wave number.

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Experimental research on ignition, quenching, reinitiation and the stabilization process in rotating detonation engine

Cited by 70 publications

References 26 publications

Numerical analysis on evolution process of multiple rotating detonation waves with ethylene–oxygen–nitrogen mixture

Numerical analysis on evolution process of multiple rotating detonation waves with ethylene–oxygen–nitrogen mixture

Analytical and numerical study of the expansion effect on the velocity deficit of rotating detonation waves

Effects of Reversed Shock Waves on Operation Mode in H2/O2 Rotating Detonation Chambers

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