Influence of flow parameters on single shock-wave-focusing detonation and initial verification

Zhang, Hesong; Chen, Xin; Xu, Shaohui; Bian, Dongliang

doi:10.1063/5.0054434

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…The wide annular slot and small flow will lead to the drop of injection pressure, the shock wave focusing intensity will be reduced, and therefore lead to insufficient focusing pressure and temperature for initiation [ 25 ]. Moreover, the high equivalence ratio will also lead to failed initiation.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…Based on previous research results [ 23 , 24 , 25 ], the experimental conditions are listed in Table 1 . In order to investigate the impact of structural parameters and import flow parameters on the shock wave focusing initiation characteristics of the combustion chamber, the experiments were conducted under two types of annular slot width (4 mm and 8 mm), two flows (1.38 kg/s and 1.78 kg/s or so), and three operation equivalence ratios (0.6, 0.8, 1.0 or so) conditions.…”

Section: Experimental Facility and Methodologymentioning

confidence: 99%

“…Our research group has been working on a shock wave focusing mechanism [ 23 , 24 , 25 ] and kerosene pre-combustion cracking components control [ 26 , 27 , 28 ] research for some time. In this paper, the experimental diagnosis of multi-cycle shock wave focusing combustion characteristics of RP-3 aviation kerosene pre-combustion pyrolysis products was carried out.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine

Song

Chen

et al. 2022

Entropy

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A shock wave focusing initiation engine was assembled and tested in an experimental program. The effective pyrolysis rate of the pre-combustor was evaluated over a range of supplementary fuel ratio in this paper. Results highlight two operational modes of the resonant cavity: (1) pulsating combustion mode, (2) stable combustion mode. The appearance of the two combustion modes is jointly affected by the flow and the structural characteristic value of the combustion chamber. This paper uses images, time-frequency analysis, and nonlinear time series analysis methods to identify and distinguish these two combustion modes. It is believed that the interaction between the combustion chamber and the supply plenum is the probable reason for different combustion modes. The experiment has found that structural parameters and import flow parameters have an impact on the initiation of the combustion chamber. Increasing the injection pressure can appropriately broaden the fuel-rich boundary of initiation. Low equivalence ratio and high injection pressure can also appropriately increase the combustion working frequency in a small range. From the perspective of pressure utilization, under the premise of ensuring successful initiation, injection pressure should not be too high.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Experimental Facility and Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine

Song

Chen

et al. 2022

Entropy

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Numerical study of reflector configuration design on shock wave focusing detonation initiation process

Xu,

Ding,

et al. 2024

Case Studies in Thermal Engineering

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Influences of thermal physical property parameters on operating characteristics of simulated rotating detonation ramjet fueled by C12H23

Yan

Shu

Zhao³

et al. 2022

AIP Advances

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Two-phase rotating detonation ramjets are considered to be suitable for aerospace applications due to their high thermodynamic cycle efficiency. These engines have an extremely complex internal flow field, in which the liquid fuel undergoes physical and chemical processes such as fragmentation, evaporation, mixing, and combustion; these processes also interact with detonation waves that have significant gradients. This makes it difficult to simulate a three-dimensional (3D) full-process rotating detonation combustion chamber. Here, based on the Euler–Lagrangian simulation method, a 3D numerical combustion chamber was simulated using kinetic theory and the constant thermal physical property parameter (TPPP) calculation method. The accuracy of these methods was then compared with the existing experimental results and theoretical values. Calculating the TPPPs using kinetic theory brought about a relatively high-pressure peak and detonation wave temperature; the detonation wave profile was also finer and more precise. The detonation wave propagation velocity of the two-phase detonation is estimated to be about 60% of the theoretical gas-phase CJ velocity. The calculation method of physical parameters has relatively little influence on the engine’s operating frequency and the detonation wave's propagation velocity but has a more significant influence on the peak pressure. Constant TPPPs can be used when the Kelvin–Helmholtz–Rayleigh–Taylor model with insufficient precision is used to consider the breakup of droplets and leads to the acceleration of the propagation speed of two-phase detonation waves.

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Influence of flow parameters on single shock-wave-focusing detonation and initial verification

Cited by 3 publications

References 17 publications

Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine

Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine

Numerical study of reflector configuration design on shock wave focusing detonation initiation process

Influences of thermal physical property parameters on operating characteristics of simulated rotating detonation ramjet fueled by C12H23

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