Propagation Mode Analysis on H2–Air Rotating Detonation Waves in a Hollow Combustor

Lin, Wen‐Wei; Tong, Yiheng; Lin, Zhiyong; Nie, Wei; L, Su

doi:10.2514/1.j058254

Cited by 16 publications

(7 citation statements)

References 25 publications

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“…A hot jet with p = 2 MPa, T = 2500 K, and u = 800 m/s was used to initiate the detonation waves. This RDC initiation method is different from the previous work 7,25 on RDW multiplicity, in which the multiple detonation waves are artificially ignited by several hot spots. Here, only a single wave is ignited and the additional detonative waves form spontaneously, as shown in detail below.…”

Section: Two-dimensional (2d) Rdc Configuration and Initial And Bound...mentioning

confidence: 79%

“…6 In the past decade, significant progress was achieved in understanding the operating mechanism RDCs. For example, the initiation characteristics, [7][8][9] detailed flow field structures, [10][11][12][13][14] various instabilities of the rotating detonation waves (RDWs), 7,[15][16][17][18] interaction between the RDWs and injection plenum, 6,[19][20][21] and propagation modes of the RDWs 16,19,[22][23][24][25] have been widely studied. When implemented as a power device, a RDC must operate stably in the desired operational mode.…”

Section: Introductionmentioning

confidence: 99%

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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: Two-dimensional (2d) Rdc Configuration and Initial And Bound...mentioning

confidence: 79%

Section: Introductionmentioning

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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show abstract

“…And instead of the annular combustion chamber, it is easier to establish an H 2 /air rotating detonation in the hollow combustion chamber. Lin et al (2015) and Lin et al (2020) experimentally validated that utilizing the pre-detonator and increasing mass flow rate play an important role in the stability of detonation propagation. The result indicated that injecting enough CH 4 /O 2 mixture is the essential condition for sustaining a stable CRDW.…”

Section: Introductionmentioning

confidence: 91%

Experimental Investigation on Two-Phase Rotating Detonation Fueled by Kerosene in a Hollow Directed Combustor

Xue

Ying²,

Ma³

et al. 2022

Front. Energy Res.

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The operating characteristic of two-phase rotating detonation fueled by kerosene in a hollow combustor with the isolation section is experimentally studied. When the air mass flow rate is 1.5 kg/s, the equivalence ratio is 0.98, and the total temperature of the mixture is 650 K, the stable rotating detonation wave (RDW) is obtained, which verifies the feasibility of the designed two-phase rotating detonation combustor (RDC). It is found that there is a high-frequency oblique shock induced by the upstream rotating detonation wave in the isolation section. A series of experimental tests have been carried out by changing the total temperature of incoming air , which is an important factor affecting the initiation. When the equivalent ratio of reactants is between 0.950–1.152, a stable single-wave detonation is formed. With the increase of equivalent ratio, the time of detonation wave establishment decreases, the intensity and frequency of detonation wave increases, and the temperature of engine tail flame rises. The equivalent chamber pressure Δpφ was defined, and the curve of the performance of the RDC with the equivalent ratio was obtained. The velocity of the RDW increases with the increase of equivalent ratio, and the chamber pressure has an optimal value, a higher or lower equivalent ratio will lead to the decrease of equivalent chamber pressure and the combustion chamber performance.

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“…In response to some of the most recent research progress, we have compiled this Special Section on "Recent Progress on Rotating Detonation and Its Application," comprising one survey [15] and seven regular technical articles [16][17][18][19][20][21][22]. The survey [15] provides a comprehensive introduction to recent progress and development trends of the continuous detonation engine, particularly within the last five years.…”

mentioning

confidence: 99%

“…They show that the outflow direction can be controlled with guide vanes mounted ahead of the combustor. Lin et al [18] experimentally study RDWs and their propagation modes in a hollow combustor with hydrogen and air. Prakash et al [19] numerically replicate the flow phenomena observed in Burr and Yu's experiments [23].…”

mentioning

confidence: 99%

Introduction to the Special Section on Recent Progress on Rotating Detonation and Its Application

2020

AIAA Journal

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Propagation Mode Analysis on H2–Air Rotating Detonation Waves in a Hollow Combustor

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Cited by 16 publications

References 25 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

Experimental Investigation on Two-Phase Rotating Detonation Fueled by Kerosene in a Hollow Directed Combustor

Introduction to the Special Section on Recent Progress on Rotating Detonation and Its Application

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