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Effect of multi-hole passive jet ignition on thermodynamic and combustion characteristics of hydrogen-doping elliptical rotary engine in high-altitude environment

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Listed:
  • Yang, Zhenghao
  • Du, Yang
  • Jia, Guangyu
  • Gao, Xu
  • He, Guangyu
  • Wang, Zhengbiao

Abstract

The conventional internal combustion engine using spark plug ignition (SI) faces the risk of performance degradation in high-altitude environments. To address this problem, this paper proposes a novel elliptical rotary engine (ERE) using hydrogen direct injection and passive jet ignition (PJI). Firstly, the 3D numerical model of PJI-ERE is developed to study the effect mechanism of PJI arrangement on mixture distribution and internal flow field. Furthermore, the jet flame shape and combustion characteristics of PJI-ERE are investigated. Finally, the impacts of PJI arrangement on the thermodynamic and emission performance of PJI-ERE at different altitudes are analyzed comparatively. The results show that at ground condition, the single-hole jet (Jet1) offers the highest jet flame kinetic energy and thus the highest thermal efficiency of 0.348. The circumferential three-hole jet (Jet3-C) produces a faster flame propagation speed via forward swirl, and reaches the best thermodynamic performance and the worst emission performance at high-altitude condition. The thermal efficiency of Jet3-C is 18.33 % and 20.48 % higher than that of Jet1 and SI at 6000 m altitude, respectively. The five-hole jet (Jet5) delays the expansion of local high-temperature zone by dispersed jet, and thus provides a better trade-off between thermodynamic and emission performance at high-altitude condition.

Suggested Citation

  • Yang, Zhenghao & Du, Yang & Jia, Guangyu & Gao, Xu & He, Guangyu & Wang, Zhengbiao, 2025. "Effect of multi-hole passive jet ignition on thermodynamic and combustion characteristics of hydrogen-doping elliptical rotary engine in high-altitude environment," Energy, Elsevier, vol. 316(C).
    • Handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225000982
    DOI: 10.1016/j.energy.2025.134456
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    References listed on IDEAS

    as
    1. Zhenghao Yang & Yang Du & Qi Geng & Xu Gao & Haonan Er & Yuanfei Liu & Guangyu He, 2022. "Performance Analysis of a Hydrogen-Doped High-Efficiency Hybrid Cycle Rotary Engine in High-Altitude Environments Based on a Single-Zone Model," Energies, MDPI, vol. 15(21), pages 1-20, October.
    2. Yang, Jinxin & Wang, Huaiyu & Ji, Changwei & Chang, Ke & Wang, Shuofeng, 2023. "Investigation of intake closing timing on the flow field and combustion process in a small-scaled Wankel rotary engine under various engine speeds designed for the UAV application," Energy, Elsevier, vol. 273(C).
    3. Qi Geng & Xuede Wang & Yang Du & Zhenghao Yang & Rui Wang & Guangyu He, 2022. "Effect of the Hydrogen Injection Position on the Combustion Process of a Direct Injection X-Type Rotary Engine with a Hydrogen Blend," Energies, MDPI, vol. 15(19), pages 1-19, October.
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    5. Merve Kucuk & Ali Surmen & Ramazan Sener, 2022. "Influence of Hydrogen Enrichment Strategy on Performance Characteristics, Combustion and Emissions of a Rotary Engine for Unmanned Aerial Vehicles (UAVs)," Energies, MDPI, vol. 15(24), pages 1-22, December.
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