Three-dimensional numerical investigations of the rotating detonation engine with a hollow combustor

Tang, Xinmeng; Wang, Jianping; Shao, Yimin

doi:10.1016/j.combustflame.2014.09.023

Cited by 183 publications

(16 citation statements)

References 31 publications

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“…However, the uncertainties on the actual wave dynamics and the interplay of several fundamental phenomena still make the optimum choice of the inner geometry of the curved chamber a subject of investigations. Chambers of rotating detonation engines (RDE) can be annular, i.e., with a cylindrical centerbody [1, 2, 3], hollow, i.e., without centerbody [4,5], or semi-hollow, i.e., with a conical centerbody [6,7,8,9]. Although only a limited number of experiments is available, the hollow and semi-hollow configurations appear to produce larger pressures and velocities of the rotating detonation [9].…”

Section: Introductionmentioning

confidence: 99%

An experimental evidence of steadily-rotating overdriven detonation

Rodriguez

Jourdain

Vidal

et al. 2019

Combustion and Flame

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This experimental work reports on detonation behaviors in a curved chamber without inner wall after diffraction of a Chapman-Jouguet (CJ) detonation from a straight channel tangent to the chamber outer wall. The upper and lower faces of the chamber receive either soot foils for recording the history of the transmission dynamics, or optical windows for schlieren high-speed visualizations. Tests were carried out with the stoichiometric propane-oxygen mixture at initial temperature 1 T 0 = 288 K and initial pressures ranging between 8 kPa and 15 kPa. The primary observation is the existence of an initial pressure range (8 kPa-12 kPa) for which, after diffraction transients, a Mach detonation can rotate normal to the outer wall with a constant angular velocity such that the normal front velocity at the wall is larger than the CJ value. The height of the Mach front decreases and its tangential velocity increases with increasing initial pressure. This over-driven detonation results from the irregular reflection of the initially-oblique front as the outer wall tilts with respect to the front, similarly to shock propagation in a continuouslyconverging channel. The Mach triple-point moves away from the wall and stabilizes its trajectory parallel to the wall. This Mach front shows detonation cells parallel to the wall with a constant mean width very small compared to that on the initial CJ front. A detonation can thus smoothly propagate in a curved chamber without center body, though the Mach front does not sweep the entire equivalent cross-section of the chamber. These observations are consistent with experimental results for RDE chambers without center body, or with linearly-increasing cross sections, that show improved properties of rotating detonation, compared to chambers with constant cross sections. This supports the interest of further studies on the hollow-chamber configuration of RDEs.

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Section: Introductionmentioning

confidence: 99%

An experimental evidence of steadily-rotating overdriven detonation

Rodriguez

Jourdain

Vidal

et al. 2019

Combustion and Flame

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“…Some preliminary 3D simulations were also studied. [18][19][20][21][22][23] Eude et al 24 used the adaptive mesh refinement to calculate the 3D simulations of RDE. They found that the pressures at inner and outer wall were different because of the effect of the curvature, and the effected curvature become larger when the chamber diameter reduced and the chamber width increased.…”

Section: Introductionmentioning

confidence: 99%

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

Xia

Zhuo

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper simulates the propagation characteristics of rotating detonation wave in the plane–radial structure for mixtures of 2H2 + O2 + 3.76N2. Two-dimensional numerical simulation was modeled, and two kinds of typical flow field and corresponding operating range were obtained under various pressure conditions. Due to the influence of curvature, the detonation wave is strengthened near the outer concave boundary and weakened near the inner convex one. The pressure ratio was varied from 1.6 to 10 by varying both stagnation and back pressure for detonation parameters and flow parameters. It is found that these parameters are dependent only on stagnation pressure for higher pressure ratio. While the pressure ratio is low, the back pressure also has an effect on them. The detonation wave height initially increases and then decreases as stagnation pressure increases, and the pressure ratio has a significant effect on it for lower pressure ratio. The inlet block ratio varies slightly from 14% to 21%. The exit average Mach number has small fluctuations between 0.89 and 1.05. The exit supersonic flow ratio varies from 14% to 74%, and the peak value is gained when pressure ratio is 6. The exit pressure amplifying ratio varies from 1.45 to 1.95, and the maximum value is obtained when pressure ratio is 2.5.

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“…The research group of Peking University lead by Wang [199][200][201][202][203][204][205][206][207][208][209][210][211] carried out numerical simulations and experimental researches on the three-dimensional structure of rotating detonation wave, described the propagating properties of detonation wave under different injection conditions and analyzed the initiation and extinction mechanisms of detonation wave. In addition, they also analyzed the thermodynamic processes of a rotating detonation engine.…”

Section: Research Progress Of Chinamentioning

confidence: 99%

Review on the Rotating Detonation Engine and It’s Typical Problems

Xie

Wen

et al. 2020

Transactions on Aerospace Research

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Detonation is a promising combustion mode to improve engine performance, increase combustion efficiency, reduce emissions, and enhance thermal cycle efficiency. Over the last decade, significant progress has been made towards the applications of detonation mode in engines, such as standing detonation engine (SDE), Pulse detonation engine (PDE) and rotating detonation engine (RDE), and the understanding of the fundamental chemistry and physics processes in detonation engines via experimental and numerical studies. This article is to provide a comprehensive overview of the progress in the knowledge of rotating detonation engine from the different countries. New observations of injection, ignition, and geometry of combustor, pressure feedback, and combustion modes of RDE have been reported. These findings and advances have provided new opportunities in the development of rotating detonation for practical applications. Finally, we point out the current gaps in knowledge to indicate which areas future research should be directed at.

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Three-dimensional numerical investigations of the rotating detonation engine with a hollow combustor

Cited by 183 publications

References 31 publications

An experimental evidence of steadily-rotating overdriven detonation

An experimental evidence of steadily-rotating overdriven detonation

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

Review on the Rotating Detonation Engine and It’s Typical Problems

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