Propagation characteristics of rotating detonation wave in plane–radial structure with different pressure conditions

Xia, Zhenjuan; Ma, Haitao; Zhuo, Changfei; Zhou, Changsheng

doi:10.1177/0954410018779300

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…This is mainly due to the included angle between the detonation wave and the normal direction of the injecting surface. The reflected shock wave formed by the reflection of detonation wave on the injecting surface, which is consistent with the previous numerical simulation results [55].…”

Section: Effect Of Outlet Length On Rdw Propagating Characteristicsupporting

confidence: 92%

Effect of Combustor Outlet Geometry on Operating Characteristics of Disk-Shaped Rotating Detonation Engine

Xia,

Ma,

et al. 2023

Aerospace

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A disk-shaped rotating detonation engine with H2/air mixture was tested to identify the impact of combustor outlet geometry on the engine’s operating characteristics. Three combustor outlet diameters and five outlet lengths are employed in the experiments. Results show that with the increase of combustor convergent ratio, the propagation stability of the rotating detonation wave decreases, and the propagation velocity and pressure peak decrease slightly. When the convergent ratio increases to a certain value (1.70 in this study), a “platform zone” with a lower pressure value appears before the sharp rise of the dynamic pressure curve. The propagation mode varies with the increase of mass flow rate at different convergent ratios. As the mass flow rate increases, the wave head number in the combustor increases. But the change rule of propagation mode with mass flow rate is greatly affected by convergent ratio. Increasing the convergent ratio is conducive to the formation of multi-wave modes, and the critical mass flow rate for mode transition drops sharply. When the convergent ratio increases to 1.70, the unstable asymmetric dual-wave mode is obtained. With the increase in the convergent ratio, the engine’s operating range and operating stability decrease significantly. Finally, changing the combustor outlet length has little influence on the engine’s operating characteristics and detonation-wave parameters.

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Section: Effect Of Outlet Length On Rdw Propagating Characteristicsupporting

confidence: 92%

Effect of Combustor Outlet Geometry on Operating Characteristics of Disk-Shaped Rotating Detonation Engine

Xia,

Ma,

et al. 2023

Aerospace

Self Cite

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“…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%

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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“…The results indicate that the decoupling and reinitiation occur repeatedly during the unstable propagation mode of the RDW, and the angular velocities of leading shock wave vary accordingly. Xia [38] carried out a numerical study on the rotating detonation wave in plane-radial structure and compared with the experimental results. Due to the influence of curvature, the detonation wave is strengthened near the outer concave boundary and weakened near the inner convex one.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Pipe Bending Curvature on H2-O2 Gaseous Detonation Wave Front

Zhao

et al. 2021

Applied Sciences

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The influence of different bend curvatures on the detonation wave propagation was analyzed by an advanced numerical simulation system. The mechanism of propagation properties is revealed by cellular structure, internal and external boundary pressure distribution, propagation process of detonation wave and chemical reaction. The cellular structure and detonation wave front of bend with different curvature are very different. The simulation results show that the detonation wave with regular cell structure propagating through the curved parts induces detonation cell size increased by diffraction near the inner wall while detonation reflected on the bottom surface resulting in decrease of cell size. Detonation wave was affected by the rarefaction wave and compression wave in the bent pipe. The pressure distribution of the bend shows that the peak pressure in the 450 curvature is the largest, which should be paid more attention in industrial design. The chemical reaction could indicate the propagation characteristics of detonation wave, and different propagation characteristics have different profiles of chemical components.

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Propagation characteristics of rotating detonation wave in plane–radial structure with different pressure conditions

Cited by 5 publications

References 31 publications

Effect of Combustor Outlet Geometry on Operating Characteristics of Disk-Shaped Rotating Detonation Engine

Effect of Combustor Outlet Geometry on Operating Characteristics of Disk-Shaped Rotating Detonation Engine

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

The Influence of Pipe Bending Curvature on H2-O2 Gaseous Detonation Wave Front

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