Experimental study on detonation characteristics of liquid kerosene/air rotating detonation engine

Li, Xiafei; Li, Jianzhong; Qin, Qiongyao; Jin, Wu; Yuan, Li

doi:10.1016/j.actaastro.2023.12.001

Cited by 19 publications

(4 citation statements)

References 30 publications

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“…Anthracite dust improved the velocity and peak pressure of the RDW, and an increase in equivalence ratio initially increased and then decreased the thrust of the RDC, demonstrating the existence of an optimal fuel equivalence ratio. Extensive numerical simulations and experimental research have confirmed the feasibility of using pulverized coal in RDW applications, demonstrating high fuel efficiency 30 – 33 .…”

Section: Introductionmentioning

confidence: 85%

“…The results indicate that the detonation wave mainly relies on the heat released by fuel detonation for propagation. Li et al 30 studied the equivalence ratio of methane-solid two-phase fuel using CFD fluid software (ANYS-FLUENT), and found that the equivalence ratio affects the stable propagation of RDW. Pioneers like Bykovskii et al 31 , 32 and Dunn et al 32 have successfully operated rotating detonation engines (RDC) using coal/H 2 as the primary solid fuel during the experimental phase.…”

Section: Introductionmentioning

confidence: 99%

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Study on detonation characteristics of pulverized coal and evolution law of detonation residue

Guo,

Ge,

Guo

et al. 2024

Sci Rep

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This study explores the detonation characteristics and compositional changes of pulverized coal, focusing on its use in Rotary Detonation Wave (RDW) technologies. While pulverized coal has shown high fuel efficiency in RDW settings, transitioning from theory to practical detonation engineering presents substantial scientific and technical hurdles. A key issue is the reprocessing of detonation byproducts for in-situ coal mine gob filling, a topic that has received little attention. Utilizing advanced methods like X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), this paper investigates the micro-morphology, composition, and aromatic structures of gas–solid products pre and post-detonation at the Tashan Coal Mine's 2305 working face. Results indicate that coal dust from the underground mining face has enhanced detonation characteristics, with the addition of coal powder fuel extending the gas detonation limits. This benefits economic aspects by reducing reliance on gas fuel and lowering detonation fuel costs. The highest recorded detonation wave velocity was 2450 m/s, 14.8% greater than that of coal dust from external sources, suggesting more effective energy release and pressure gain. Furthermore, the study links detonation combustion intensity to coal's aromatic properties, noting a post-detonation aromaticity index (I) of 0.4941. This indicates an improvement in the aromatic structure under high-temperature conditions, vital for coal's reactivity and energy efficiency in RDW applications. This research not only deepens the understanding of coal dust combustion mechanisms but also advances clean coal utilization and deep coal fluidization mining, addressing significant RDW technological challenges.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Study on detonation characteristics of pulverized coal and evolution law of detonation residue

Guo,

Ge,

Guo

et al. 2024

Sci Rep

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“…Since RDEs have attracted extensive attention as potential fuelers of aerospace and weapons, researchers are focusing on further enhancing the performance of RDEs, such as the propellant injection [3][4][5], combustor geometry [6][7][8][9], method of ignition [10][11][12], and formation mechanism of the rotating detonation wave (RDW) [10,13]. In addition, the rotating detonation rocket engines [14,15], scramjet engines [16][17][18], and turbine engines [19,20] have been built as experimental prototypes to promote engineering application, but the running time of RDEs is limited to seconds due to the harsh thermal environment.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Prediction and Heat Transfer Characteristics of Two-Phase RDE during Long-Duration Operation

Wang,

Song,

Chen

et al. 2024

Energies

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Accurately predicting the thermal characteristics and heat transfer distribution of the rotating detonation engine (RDE) and acquiring a clear understanding of the performance and mechanism of the rotating detonation are of great significance for achieving the safe and reliable long-duration operation of RDEs. Using RP-3 as fuel, a long-duration experimental study is performed on a 220 mm-diameter RDC to investigate the details with respect to the thermal environment. The heat flux at the typical location and the average heat flux of both the inner and outer cylinders are measured, respectively. Meanwhile, the peak pressure of the rotating detonation wave (RDW) and specific thrust are analyzed. When the ER is between 0.5 and 1 (oxidizer 2 kg/s), the stable rotating detonation mode is obtained, and the detonation duration is set as 40 s to accurately calculate the heat released by the detonation combustion. The heat flux in the upstream region of the RDW location ranges from 2.40 × 105 W/m2 to 3.17 × 105 W/m2, and the heat flux in the downstream area of the RDW location ranges from 1.05 × 106 W/m2 to 1.28 × 106 W/m2. The results demonstrate the important role of the detonation combustion zone, and the thrust performance of RDC can be improved by making the RDW move forward along the RDC axis, which is the optimal direction of detonation combustion. Through a comparison of average heat flux under different conditions, it is found that the heat released by the RDC is directly related to its thrust. In addition, the average heat flux of the inner cylinder is about three times that of the outer cylinder for the two-phase RDC with a Tesla valve intake structure, indicating that the high-temperature combustion product is closer to the inner wall. Therefore, more thermal protection should be allocated to the inner cylinder, and a more systematic analysis of the two-phase flow field distribution in the annular combustion chamber should be carried out to improve the thrust performance. In this paper, the average heat flux of the inner and outer cylinders of the RDC as well as the typical local heat flux of the outer cylinders is quantitatively measured by means of experiments, which not only deepens the understanding of RDC flow field distribution, but also provides quantitative boundary conditions for the thermal protection design of RDCs.

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“…The main approach used to optimize the DDT process has been optimizing the ignition and the PDC structure. Most of the research objects have been gaseous fuels, and when liquid fuel has been the research object, it has typically been aviation kerosene [40][41][42]. A series of complex methods have been devised to accelerate the evaporation and atomization process of fuels [43,44].…”

Section: Introductionmentioning

confidence: 99%

Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

Huang,

Wang,

Shi

et al. 2024

Energies

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Traditional exhaust-gas turbocharging exhibits hysteresis under variable working conditions. To achieve rapid-intake supercharging, this study investigates the synergistic coupling process between the detonation and diesel cycles using gasoline as fuel. A numerical simulation model is constructed to analyze the detonation characteristics of a pulse-detonation combustor (PDC), followed by experimental verification. The comprehensive process of the flame’s deflagration-to-detonation transition (DDT) and the formation of the detonation wave are discussed in detail. The airflow velocity, DDT time, and peak pressure of detonation tubes with five different blockage ratios (BR) are analyzed, with the results imported into a one-dimensional GT-POWER engine model. The results indicate that the generation of detonation waves is influenced by flame and compression wave interactions. Increasing the airflow does not shorten the DDT time, whereas increasing the BR causes the DDT time to decrease and then increase. Large BRs affect the initiation speed of detonation in the tube, while small BRs impact the DDT distance and peak pressure. Upon connection to the PDC, the transient response rate of the engine is slightly improved. These results can provide useful guidance for improving the transient response characteristics of engines.

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Experimental study on detonation characteristics of liquid kerosene/air rotating detonation engine

Cited by 19 publications

References 30 publications

Study on detonation characteristics of pulverized coal and evolution law of detonation residue

Study on detonation characteristics of pulverized coal and evolution law of detonation residue

Experimental Investigation of Thermal Prediction and Heat Transfer Characteristics of Two-Phase RDE during Long-Duration Operation

Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

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