| 摘要: |
| 压燃式航空活塞发动机在高空环境下易出现动力衰减、推力不足等关键问题，因此，增压系统的匹配研究和优化至关重要。基于GT-Power软件构建一维整机热力学模型，探究了不同海拔下增压模式以及高压级压气机叶片开度对压燃式航空活塞发动机性能的影响。研究表明：海拔4000m下，在3400r/min工况点，相较于固定截面增压（FGT），采用可变涡轮截面增压（VGT）技术后，燃烧始点提前了31.7%，转矩和功率分别提高36%，43.5%，泵气损失增加10.5%；而采用可调两级增压（RTST）后性能提升效果更显著，使发动机工作升限从5480m提升到了6000m，但在高转速下，RTST增压效率以及对发动机动力性能的增幅会出现下降趋势；低海拔下，随RTST高压级VGT叶片开度的减小，燃烧始点推迟，功率降低，油耗增加；高海拔下，燃烧始点、功率和油耗随叶片开度的减小而呈现与低海拔时相反的趋势。 |
| 关键词: 压燃式航空活塞发动机 海拔 增压模式 可变截面增压器 两级增压 |
| DOI：10.13675/j.cnki.tjjs.2208080 |
| 分类号:V234 |
| 基金项目:国家自然科学基金（52165032）。 |
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| Effects of Different Supercharging Mode on Performance of Compression Combustion Aviation Piston Engine |
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CHEN Gui-sheng1, SUN Min1, HE Ru1, SHEN Ying-gang2, YANG Jie3, YANG Shun1
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1.Yunnan Key Laboratory of Internal Combustion Engine，Kunming University of Science and Technology， Kunming 650500，China;2.City College，Kunming University of Science and Technology，Kunming 650051，China;3.Faculty of Civil Aviation and Aeronautics，Kunming University of Science and Technology，Kunming 650500，China
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| Abstract: |
| The compressed-combustion aviation piston engine is prone to the key problems such as power attenuation and insufficient thrust in the high altitude environment， so the matching research and optimization of the supercharging system is very important. Based on the GT-Power software， the thermodynamic model of one-dimensional engine was constructed， and the influence of the pressurization mode at different altitudes and the blade opening of high-pressure stage compressor on the performance of compressed-combustion aviation piston engine was investigated. The results show that， at 4000m above sea level， at 3400r/min， compared with fixed geometry turbocharger （FGT）， with variable geometry turbocharger （VGT）， the combustion starting point is advanced by 31.7%， the torque and power increase by 36% and 43.5% ，respectively， and the pump gas loss increases by 10.5%. With regulated two stage turbocharger （RTST）， the performance improvement is more significant，which increases the engine operating threshold from 5480m to 6000m. However， at high rotational speed， the increase of RTST’s supercharging efficiency and engine’s power performance will show a downward trend. At low altitude， with the decrease of RTST high pressure VGT blade opening， the starting point of combustion is delayed， the power is reduced， and the fuel consumption increases. At high altitude， the combustion starting point， power and fuel consumption show the opposite trend as the blade opening decreases. |
| Key words: Compression combustion aviation piston engine Altitude Turbocharging mode Variable geometry turbocharger Two-stage turbocharging |
