Effects of injection parameters on propagation patterns of hydrogen-fueled rotating detonation waves

Yao, Kepeng; Yang, Pengfei; Teng, Honghui; Chen, Zheng; Wang, Chun

doi:10.1016/j.ijhydene.2022.09.051

Cited by 16 publications

(2 citation statements)

References 54 publications

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“…As the total temperature increased to 500 K, dual waves were observed to propagate in the same direction, as shown in Figure 3e,f. In general, the number of detonation waves increased as the total temperature rose, which is consistent with Yao [34].…”

Section: Effects Of Total Temperature On the Modes Of Detonationsupporting

confidence: 86%

Effects of Ozone Addition on Multi-Wave Modes of Hydrogen–Air Rotating Detonations

2023

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Ozone addition presents a promising approach for optimizing and regulating both combustion and ignition mechanisms. In Rotating Detonation Engines (RDEs), investigating the impact of ozone addition is particularly important due to the fact of their unique operating conditions and potential for improved efficiency. This study explores the influence of ozone concentration, total temperature, and equivalent ratio on the combustion characteristics of a hydrogen–air mixture infused with ozone. Utilizing the mixture as a propellant, the combustion chamber of a continuous rotating detonation engine is replicated through an array of injection ports, with numerical simulations conducted to analyze the detonation wave combustion mode. Our results show that an increase in total temperature leads to an increase in the number of detonation waves. Incorporating a minor quantity of ozone can facilitate the ignition process for the detonation wave. Increasing the ozone content can result in the conversion from a single-wave to dual-wave or multi-wave mode, providing a more stable combustion interface. A low ozone concentration acts as an auxiliary ignition agent and can significantly shorten the induction time. As the total temperature increases, the detonation propagation velocity and the peak heat release rate both decrease concurrently, which leads to a decline in the exit total pressure and an augmentation in the specific impulse. Employing ozone exerts a minimal impact on the detonation propagation and the overall propulsion performance. The requirement for ozone-assisted initiation differs noticeably between rich and lean combustion.

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Section: Effects Of Total Temperature On the Modes Of Detonationsupporting

confidence: 86%

Effects of Ozone Addition on Multi-Wave Modes of Hydrogen–Air Rotating Detonations

2023

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“…In RDEs, gaseous fuels are frequently employed. Researchers have conducted investigations [21][22][23][24][25][26] on the effects of several factors on rotating detonation wave characteristics and have made efforts to control the propagation mode of rotating detonation. These factors include propellant mass flow rate, chamber outlet pressure, propellant pressure loss, and nozzle structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Propagation Characteristics of Rotating Detonation Wave with Liquid Hydrocarbon/High-Enthalpy Air Mixture

Jia,

Zhang,

Meng

et al. 2023

Aerospace

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Rotating detonation engines (RDEs) are a promising propulsion technology featuring high thermal efficiency and a simple structure. To adapt the practical engineering applications of ramjet RDEs, rotating detonation combustion using a liquid hydrocarbon and pure air mixture will be required. This paper presents an experimental study on the propagation characteristics of rotating detonation waves with a liquid hydrocarbon and high-enthalpy air mixture in a hollow cylindrical chamber. The parameters, such as the equivalence ratio and inlet mass flux, are considered in this experiment. The frequency and the propagation velocity of rotating detonation combustion are analyzed under typical operations. The experimental results show that the peak pressure and propagation velocity of the rotating detonation wave are close to the C-J theoretical values under the inlet mass flux of 400 kg/(m2s). Both the propagation velocity and peak pressure of the rotating detonation wave decrease as the mass flux and equivalence ratio are reduced while the number of detonation wavefronts increases. Detonation wave instability tends to occur when the inlet mass flux decreases. There is a transition progress from thermo-acoustic combustion to rotating detonation combustion in the experiment under the condition of mass flux 350 kg/(m2s) and the equivalent ratio 0.8. The static pressure in the chamber is higher during detonation combustion than during thermo-acoustic combustion. These experimental results provide evidence that rotating detonation waves have the potential to significantly improve propulsion performance. The findings can serve as a valuable reference for the practical engineering application of rotating detonation engines.

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Numerical investigation on the working characteristics of continuous detonation afterburner combined with turbine

Qiu,

Wang,

et al. 2024

Applied Thermal Engineering

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Effects of injection parameters on propagation patterns of hydrogen-fueled rotating detonation waves

Cited by 16 publications

References 54 publications

Effects of Ozone Addition on Multi-Wave Modes of Hydrogen–Air Rotating Detonations

Effects of Ozone Addition on Multi-Wave Modes of Hydrogen–Air Rotating Detonations

Experimental Study on the Propagation Characteristics of Rotating Detonation Wave with Liquid Hydrocarbon/High-Enthalpy Air Mixture

Numerical investigation on the working characteristics of continuous detonation afterburner combined with turbine

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