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Engine performance analysis and optimization of a dual-mode scramjet with varied inlet conditions

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Abstract

A dual-mode scramjet can operate in a wide range of flight conditions. Higher thrust can be generated by adopting suitable combustion modes. Based on the net thrust, an analysis and preliminary optimal design of a kerosene-fueled parameterized dual-mode scramjet at a crucial flight Mach number of 6 were investigated by using a modified quasi-one-dimensional method and simulated annealing strategy. Engine structure and heat release distributions, affecting the engine thrust, were chosen as analytical parameters for varied inlet conditions (isolator entrance Mach number: 1.5–3.5). Results show that different optimal heat release distributions and structural conditions can be obtained at five different inlet conditions. The highest net thrust of the parameterized dual-mode engine can be achieved by a subsonic combustion mode at an isolator entrance Mach number of 2.5. Additionally, the effects of heat release and scramjet structure on net thrust have been discussed. The present results and the developed analytical method can provide guidance for the design and optimization of high-performance dual-mode scramjets.

Graphical Abstract

A dual-mode scramjet can achieve high thrust in a wide range of flight conditions. The present work uses modified quasi-1-D analysis model and simulated annealing strategy to investigate the engine performance of kerosene-fueled parameterized dual-mode scramjet at a crucial flight Mach number of 6. Engine structure and heat release distributions were optimized to obtain optimal engine net thrust for varied inlet conditions. The highest net thrust can be achieved by subsonic combustion mode at an isolator entrance Mach number of 2.5. The present results and analytical method can provide guidance for the design and optimization of high-performance dual-mode scramjets.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant 11002148)..

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Authors and Affiliations

  1. State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Lu Tian, Li-Hong Chen, Qiang Chen, Feng-Quan Zhong & Xin-Yu Chang

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  1. Lu Tian
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  2. Li-Hong Chen
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  3. Qiang Chen
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  4. Feng-Quan Zhong
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  5. Xin-Yu Chang
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Correspondence to Li-Hong Chen.

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Tian, L., Chen, LH., Chen, Q. et al. Engine performance analysis and optimization of a dual-mode scramjet with varied inlet conditions. Acta Mech. Sin. 32, 75–82 (2016). https://doi.org/10.1007/s10409-015-0503-9

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