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Scavenging Ports’ Optimal Design of a Two-Stroke Small Aeroengine Based on the Benson/Bradham Model

Author

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  • Yuan Qiao

    (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China)

  • Xucheng Duan

    (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China)

  • Kaisheng Huang

    (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China)

  • Yizhou Song

    (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China)

  • Jianan Qian

    (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China)

Abstract

The two-stroke engine is a common power source for small and medium-sized unmanned aerial vehicles (UAV), which has wide civil and military applications. To improve the engine performance, we chose a prototype two-stroke small areoengine, and optimized the geometric parameters of the scavenging ports by performing one-dimensional (1D) and three-dimensional (3D) computational fluid dynamics (CFD) coupling simulations. The prototype engine is tested on a dynamometer to measure in-cylinder pressure curves, as a reference for subsequent simulations. A GT Power simulation model is established and validated against experimental data to provide initial conditions and boundary conditions for the subsequent AVL FIRE simulations. Four parameters are considered as optimal design factors in this research: Tilt angle of the central scavenging port, tilt angle of lateral scavenging ports, slip angle of lateral scavenging ports, and width ratio of the central scavenging port. An evaluation objective function based on the Benson/Bradham model is selected as the optimization goal. Two different operating conditions, including the take-off and cruise of the UAV are considered. The results include: (1) Orthogonal experiments are analyzed, and the significance of parameters are discussed; (2) the best factors combination is concluded, followed by simulation verification; (3) results before and after optimization are compared in details, including specific scavenging indexes (delivery ratio, trapping efficiency, scavenging efficiency, etc.), conventional performance indicators, and the sectional views of gas composition distribution inside the cylinder.

Suggested Citation

  • Yuan Qiao & Xucheng Duan & Kaisheng Huang & Yizhou Song & Jianan Qian, 2018. "Scavenging Ports’ Optimal Design of a Two-Stroke Small Aeroengine Based on the Benson/Bradham Model," Energies, MDPI, vol. 11(10), pages 1-26, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2739-:d:175329
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    References listed on IDEAS

    as
    1. Fukang Ma & Zhenfeng Zhao & Yangang Zhang & Jun Wang & Yaonan Feng & Tiexiong Su & Yi Zhang & Yuhang Liu, 2017. "Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine," Energies, MDPI, vol. 10(5), pages 1-18, May.
    2. Mirko Grljušić & Ivan Tolj & Gojmir Radica, 2017. "An Investigation of the Composition of the Flow in and out of a Two-Stroke Diesel Engine and Air Consumption Ratio," Energies, MDPI, vol. 10(6), pages 1-20, June.
    3. Fu-Kang Ma & Jun Wang & Yao-Nan Feng & Yan-Gang Zhang & Tie-Xiong Su & Yi Zhang & Yu-Hang Liu, 2017. "Parameter Optimization on the Uniflow Scavenging System of an OP2S-GDI Engine Based on Indicated Mean Effective Pressure (IMEP)," Energies, MDPI, vol. 10(3), pages 1-20, March.
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    Cited by:

    1. Yuan Qiao & Yizhou Song & Kaisheng Huang, 2019. "A Novel Control Algorithm Design for Hybrid Electric Vehicles Considering Energy Consumption and Emission Performance," Energies, MDPI, vol. 12(14), pages 1-28, July.
    2. Jingming Zhao & Xiaolong Hao & Kai Zhang & Yuanyuan Li & Guanghui Zhang, 2023. "Investigation of the Vibration Transmission Characteristics of the Aero-Engine Casing System by Rotating Force Exciter," Energies, MDPI, vol. 16(4), pages 1-13, February.
    3. Yuan Qiao & Li Lin & Wei Zhong & Kaisheng Huang, 2020. "Investigation on the Performance Characteristics of 2-Stroke Heavy Fuel Light Aeroengine (2SHFLA) with Different Fuel Injection Systems: Modeling and Comparative Simulation," Energies, MDPI, vol. 13(19), pages 1-39, October.

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