Effects of inner cylinder length on H2/air rotating detonation

Zhang, Hailong; Liu, Weidong; Liu, Shijie

doi:10.1016/j.ijhydene.2016.06.083

Cited by 60 publications

(5 citation statements)

References 23 publications

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“…Among the past studies on detonation in HCCs, similarities between RDWs and the tangential combustion instability of an LRE have been mentioned [21]. Recent progress on this topic has been to investigate the feasibility of detonation in an HCC with a Laval nozzle [17] and analyze the relationship of RDWs and tangential combustion instability of an LRE based on their frequency [20,28]. From the perspective of combustion instability, 1T and 2T intrinsic acoustic frequencies (i.e., 6.24 and 10.34 kHz) of the HCC can be calculated from intrinsic acoustic frequency formula f m00 c∕2α m0 ∕R out [20], respectively, where c is computed from the initial state parameters of the H 2 -air mixture (P 0 90 kPa, T 0 288 K); the value of α m0 is the mth root of the zero-order Bessel function, 0.5861 and 0.9722 for the first-order and secondorder tangential acoustic frequencies, respectively.…”

Section: Resultsmentioning

confidence: 99%

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

Lin¹,

Tong²,

Lin

et al. 2020

AIAA Journal

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Section: Resultsmentioning

confidence: 99%

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

Lin¹,

Tong²,

Lin

et al. 2020

AIAA Journal

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“…Usually the DDT is not a significant process in the rotating detonation combustor and it only exist at the very beginning of initiation [22]. However, in some cases, the deflagration can last for a long time or even the entire experimental run [23].…”

Section: Deflagration-to-detonation Transitionmentioning

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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“…Results showed that with the increase of fuel injection area ratio, the wave head number of detonation wave increased, and the specific impulse increased accordingly. Zhang et al [29,30] verified the experimental feasibility of hollow RDE by reducing the length of the inner cylinder of the annular RDE and studied the RDW characteristics in the hollow combustor with a Laval nozzle. It was found that the detonation wave number increased with the increase in the nozzle contraction ratio.…”

Section: Introductionmentioning

confidence: 99%

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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Effects of inner cylinder length on H2/air rotating detonation

Cited by 60 publications

References 23 publications

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

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

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

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

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