Development trend and difficulty analysis of supersonic civil aircraft propulsion system
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摘要:
未来超声速民机具有客观市场前景,经济性、环保型、舒适性兼备的推进系统研制是其关键。梳理了超声速民机的整体发展情况;对比分析了超声速民机动力系统在低油耗、低噪声、低排放方面与亚声速民机动力系统的设计区别与挑战;剖析了目前涡喷构型、中涵道比涡扇构型、变循环构型发动机在作为超声速民机动力系统的优势及瓶颈;分析了油耗、排放、噪声难以兼顾的内在原理。研究提出了通过提升发动机通流能力来兼顾油耗、噪声、排放三大难题的思路,并从低压涡轮功受限和内涵道通流面积受限两方面剖析了限制目前发动机通流能力的主要原因;还提出了须在变循环发动机气动热力布局原始创新的基础上,发展性能、排放、噪声一体化设计与评估方法,支撑实现未来超声速客机推进系统油耗水平、排放水平、噪声水平同步提升的发展思路,为超声速民机动力系统研制提供参考和支撑。
Abstract:The supersonic civil aircraft has objective market prospect in the future, and the key lies in development of propulsion system with economy, environmental protection and comfort. The overall development of supersonic civil aircraft was analyzed. The design differences and challenges of supersonic civil aircraft propulsion system with low fuel consumption, low noise and low emission were compared and analyzed with those of subsonic civil aircraft propulsion system. The advantages and bottlenecks of turbojet configuration, medium-bypass turbofan configuration and variable cycle configuration engines as supersonic civil aircraft propulsion systems were discussed in detail. The internal principle of difficulty in taking into full account the fuel consumption, emission and noise was analyzed. An idea of taking fuel consumption, noise and emission into full account by improving engine flow capacity was put forward, and the main reasons for limiting the current engine flow capacity were analyzed from two aspects: low-pressure turbine work limitation and inner bypass flow area limitation. Finally, based on the original innovation of aero-thermal layout of variable cycle engine, for the purpose of providing reference and support for the development of supersonic civil aircraft propulsion system, the integrated design and evaluation methods for performance, emission and noise should be developed to support the development idea of realizing simultaneous development of future supersonic civil aircraft propulsion system’s fuel consumption level, emission level and noise level.
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Key words:
- supersonic civil aircraft /
- propulsion system /
- low fuel consumption /
- low noise /
- low emission
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表 1 超声速研发项目
Table 1. Trend of engine fuel consumption with time
年份 计划 1962~1972 超声速客机项目 1971~1981 超声速巡航研究 1976~1981 变循环发动机项目 1990~1999 高速研究计划 2000~2006 静音超声速平台 1997~2006 国家超声速运输机试验 1994~1999 下一代超声速研究项目 2005~2009 环境友好高速飞行器计划 参数 起飞( Ma=0,H=0 m) 跨声速( Ma=1.36,H= 10700 m)巡航 (Ma=2.0,H= 16100 m)F/kN 169 101.9 44 rSFC/(kg/(daN·h)) 1.38 1.20 1.28 TTET/K 1350 1520 1390 T3/K 673 725 779 EEI,NOx/(g/kg) 12.9 17.0 16.2 V9/(m/s) 862 1058 1058 类型 TTET/K rSFC/(kg/(daN·h)) T3/K EEI,NOx /(g/kg) V9/(m/s) Olympus 593 1390 1.28 779 16.2 1058 MTF构型 1.06 40.2 821 TF构型 1.158 35.3 899 SBVCE构型 1660 1.26 950 25.7 1028 IC-TF 1322 1.27 551 5 1054 类型 TTET/K rSFC/(kg/(daN·h)) T3/K EEI,NOx /(g/kg) V9/(m/s) Olympus 593 1520 1.20 725 17.0 1058 MTF构型 0.972 39 739 TF构型 0.995 35.9 815 SBVCE构型 1750 1.134 889 27.1 993 IC-TF构型 1420 1.20 470 4.9 1059 表 5 不同变循环发动机对比
Table 5. Comparison of different variable-cycle engines
类型 降低噪声的主要措施 降低排放的主要措施 不足 MTF构型 旁路辅助进气, 中间串联风扇减小半径,降低切线速度 混合室总压不平衡程度加剧,需要较高涡轮前温度支撑较大外涵流量,排放恶化严重 Flade构型 增加Flade涵道降低喷流噪声, 同时Flade涵道起噪声屏蔽作用 安装性能较差 MNE构型 喷管前增加辅助进气口降低排气速度 需要较长混合区,未兼顾排放 IVP构型 变涵道组合排气(IVP喷管) 未兼顾排放 IC-TF构型 燃烧室进气预冷 间冷器增大质量,内涵排气速度无法降低,未兼顾噪声 IFVE构型 增大外涵道流量降低排气速度 降低燃烧室进气压力 气流转化阀复杂,气动稳定性问题突出 TF构型 增大外涵道流量降低排气速度 降低燃烧室进气压力 需要较高涡轮前温度支撑较大外涵流量,排放恶化严重 VSCE构型 多燃烧室组合调控 低污染燃烧室组合温度控制 外涵燃烧室外没有涵道隔离燃烧产生的噪声 -
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