Investigations of the Effect of Constant-Area Section on Thermal Choking in a Dual-Mode Scramjet Combustor

Xing, Jianwen; Xiao, Baoguo; Tian, Ye; Zhao, Zheng

doi:10.1061/(asce)as.1943-5525.0000624

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Coupled simulation of the vane-type column injector can calculate the flow field distribution, heat flux inside and outside the column, and the temperature distributed in the solid materials (see Figure 33), thus greatly contributing to the calculation of thermal conduction of components in thermal management. Xing et al [122] studied the influence of different constant thermal throat areas of the exhaust nozzle on thermal blockage [123] of dual-mode scramjets [124]. Methods like the ground test, pressure measurement, and three-dimensional numerical simulation connected to models were used in the study, and the experimental results show that the constant throat area contributes to ignition of the combustion chamber and retention of the flame, and structures with short constant areas increase the heat release in the combustor and reduce entropy generation, thereby increasing combustion efficiency.…”

Section: Thermal Control Systemsmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

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Combined-cycle engine is a potential propulsion system for hypersonic aircraft. To ensure long-term, normal operation of combined-cycle engine under the harsh environment of high thermal load, it is of great significance to study the thermal protection and management of the propulsion system. In this study, the objective and development status of thermal protection and thermal management systems for the combined-cycle propulsion system were described. The latest research progresses of thermal protection, thermal barrier coating, and thermal management system of the combined-cycle propulsion system were summarized. Moreover, the problems and shortcoming in current researches were summarized. In addition, a prospect for the future development of thermal protection and management of the combined-cycle propulsion system was presented, pointing out a direction of great value and vital research significance to thermal protection and management of the combined-cycle propulsion system.

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Section: Thermal Control Systemsmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

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Reconstruction of flow structure in a scramjet combustor using a multi-level connected shifted-window transformer

Wu,

Meng,

Tian

et al. 2024

Physics of Fluids

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Stable combustion is desirable for efficient operation of scramjet engines at high flight Mach numbers, and being able to reconstruct the flow-field wave patterns in stable combustion facilitates proactive evaluation of engine operating conditions. Proposed here is a multi-level connected shifted-window transformer (MCSwinT) model for reconstructing the flow-field wave patterns of stable combustion in a supersonic combustor. A combustion feature conversion block is used to convert high-dimensional and low-dimensional combustion features; a deep pressure feature extraction block is used to extract the flow-field wave patterns, and MCSwinT blocks enable multi-level fusion, thereby extracting the high-dimensional combustion features of the flow-field wave system. A dynamic loss function unifies spatial content loss and feature space loss, leading to enhanced reconstruction results. Separately, data on the stable combustion process of a hydrogen-fueled scramjet engine were collected in a direct-connect supersonic pulse combustion wind tunnel, and these data are used to validate the robustness and generalization capability of MCSwinT. The experimental results show that the flow-field wave patterns of stable combustion are reconstructed successfully using MCSwinT of different scales. Compared to other models, MCSwinT exhibits lower model complexity while achieving performance improvements of 7% and 17% in peak signal-to-noise ratio and structural similarity index, respectively. Additionally, the high generalization ability of the proposed model is validated in a sparsity experiment. This model effectively reconstructs the flow-field wave patterns of stable combustion, providing a crucial foundation for further research on scramjet engines.

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Investigations of the Effect of Constant-Area Section on Thermal Choking in a Dual-Mode Scramjet Combustor

Cited by 2 publications

References 17 publications

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

Reconstruction of flow structure in a scramjet combustor using a multi-level connected shifted-window transformer

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