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Overall performance assessment for scramjet with boundary-layer ejection control based on thermodynamics

Author

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  • He, Yubao
  • Cao, Ruifeng
  • Huang, Hongyan
  • Qin, Jiang
  • Yu, Daren

Abstract

To avoid the inlet unstart at high equivalence ratio and increase the performance of scramjet with ram-mode, a flow control method of boundary-layer ejection is implemented based on the potential thermodynamic process in a turbo-pump supply system of fuel vapor within a cooling channel. The effect of ejection on overall scramjet performance is studied by taking the integration of measures including numerical simulation and stream thrust analysis. Results indicate that the critical backpressure is significantly increased as the ejection total pressure increased, thereby increasing the compression capacity and efficiency, and decreasing the irreversible losses of shock wave and viscous dissipation. For the ejection total pressure of Pt,eje = 2.40–4.00 × 106 Pa, the critical backpressure ratio is quantitatively increased by 1.18–11.8% along with the utilization of ejection mass flow rate of about 88.0–100% overall mass flow rate of methane fuel gas, and simultaneously the total pressure ratio, kinetic efficiency is also increased by 7.32–13.1%, and 1.63–2.96%, respectively, while the dimensionless entropy increase is decreased by 14.5–26.8%. On this basis, the specific thrust, specific impulse, and total efficiency is increased by 2.84–4.69%, 2.80–4.68%, and 2.87–4.70%, respectively, which re-emphasizes that the boundary-layer ejection is an available fluid control method.

Suggested Citation

  • He, Yubao & Cao, Ruifeng & Huang, Hongyan & Qin, Jiang & Yu, Daren, 2017. "Overall performance assessment for scramjet with boundary-layer ejection control based on thermodynamics," Energy, Elsevier, vol. 121(C), pages 318-330.
    • Handle: RePEc:eee:energy:v:121:y:2017:i:c:p:318-330
    DOI: 10.1016/j.energy.2016.12.123
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    References listed on IDEAS

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    1. Zhang, Duo & Yang, Shengbo & Zhang, Silong & Qin, Jiang & Bao, Wen, 2015. "Thermodynamic analysis on optimum performance of scramjet engine at high Mach numbers," Energy, Elsevier, vol. 90(P1), pages 1046-1054.
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    Cited by:

    1. Li, Xiaojie & Huang, Xiaobin & Liu, Hong & Du, Jianke, 2020. "Fuel reactivity controlled self-starting and propulsion performance of a scramjet: A model investigation," Energy, Elsevier, vol. 195(C).
    2. Wang, Youyin & Hou, Wenxin & Zhang, Junlong & Tang, Jingfeng & Chang, Juntao & Bao, Wen, 2021. "Research on the operating boundary of the dual mode scramjet with a constant area combustor through thermodynamic cycle analysis," Energy, Elsevier, vol. 216(C).
    3. Li, Chaolong & Xia, Zhixun & Ma, Likun & Chen, Binbin & Feng, Yunchao & Zhang, Jiarui & Duan, Yifan, 2023. "Performance analysis on the specific impulse and specific thrust of scramjet with a quasi-one-dimensional model," Energy, Elsevier, vol. 267(C).
    4. Ambe Verma, Kumari & Murari Pandey, Krishna & Ray, Mukul & Kumar Sharma, Kaushal, 2021. "Effect of transverse fuel injection system on combustion efficiency in scramjet combustor," Energy, Elsevier, vol. 218(C).

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