LEADING EDGE

GRAHAM WARWICK

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LEADING EDGE

机译：前沿

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HYDROGEN HAS REENTERED THE aviation lexicon as governments and in-dustry look for ways to reduce the environmental impact of air transport. While turbine-powered airliners burning liquid hydrogen and generating zero emissions remain a distant dream, there is a nearer-term option: fuel cells.NASA investigated fuel cells for electric propulsion in the mid-2000s, but they were too heavy at 0.3 kW/kg. Now the latest hydrogen fuel cells in cars such as Toyota's Mirai have specific power exceeding 2 kW/kg, making them practical alternatives to batteries for smaller aircraft.Like batteries, fuel cells produce zero emissions in operation, yet they have higher energy density, which can provide greater range for all-electric air taxis and regional airliners. The technology is less mature and more expensive than batteries, but that is changing as the automotive industry embraces fuel cells.

机译：氢气已经重新进入航空莱克西森，因为政府和努力寻找减少航空运输环境影响的方法。虽然燃烧液体氢气和发电零排放的涡轮动力均航空公司仍然是一个遥远的梦想，但有一个接近的术语：燃料电池。在2000年代中期的电动推进的NASA调查燃料电池，但它们在0.3 kW /公斤。现在，在汽车如丰田的未来最新的氢燃料电池具有比功率超过2千瓦/公斤，使他们的电池切实可行的办法较小aircraft.Like电池，燃料电池产生的操作零排放，但他们具有更高的能量密度，这可以为全电气出租车和区域客机提供更多的范围。该技术比电池成熟，更昂贵，但随着汽车行业拥抱燃料电池，这正在变化。

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《Aviation Week & Space Technology》 |2019年第17期|12-12|共1页
作者
GRAHAM WARWICK;
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收录信息美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
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1. Ascending aorta diameters measured by echocardiography using both leading edge-to-leading edge and inner edge-to-inner edge conventions in healthy volunteers [J] . MuraruD., MaffessantiF., KocabayG., European heart journal cardiovascular Imaging . 2014,第4期

机译：通过超声心动图在健康志愿者中使用前缘到前缘和内缘到内缘的常规方法测量升主动脉直径
2. Leading-edge flow criticality as a governing factor in leading-edge vortex initiation in unsteady airfoil flows [J] . Ramesh Kiran, Granlund Kenneth, Ol Michael V., Theoretical and Computational Fluid Dynamics . 2018,第2期

机译：作为非定常翼型流动的前沿涡旋启动中的主导流量临界。
3. Commentary on "Superior Reproducibility of the Leading to Leading Edge and Inner to Inner Edge Methods in the Ultrasound Assessment of Maximum Abdominal Aortic Diameter" [J] . Altes Pere, Llagostera Secundino European journal of vascular and endovascular surgery: the official journal of the European Society for Vascular Surgery . 2018,第2期

机译：“在超声评估最大腹主动脉直径的超声评估中导致前沿和内部边缘方法的优越再现性”评论
4. Effect of a leading-edge fillet on the wall surface pressure fluctuations upstream of the leading edge of an appendage-body junction [C] . Mudit Agrawal AIAA SciTech Forum and Exposition . 2021

机译：前缘内圆角对阑尾 - 骨干交界处的前缘上游壁面压力波动的影响
5. Active Control of Performance and Vibratory Loads Using Trailing-Edge Flaps and Leading-Edge Slats [D] . Ravichandran, Kumar. 2019

机译：使用后缘襟翼和前沿板条的性能和振动载荷的主动控制
6. Phosphodiesterase 1C integrates store-operated calcium entry and cAMP signaling in leading-edge protrusions of migrating human arterial myocytes [O] . Paulina Brzezinska, Nicholas J. Simpson, Fabien Hubert, 2021

机译：磷酸二酯酶1c集成了迁移人类动脉肌细胞的前缘突起中的储存钙入口和阵营信号传导
7. Ascending aorta diameters measured by echocardiography using both leading edge-to-leading edge and inner edge-to-inner edge conventions in healthy volunteers [O] . Denisa Muraru, Francesco Maffessanti, Gonenc Kocabay, 2013

机译：通过超声心动图测量的升高的主动脉直径使用健康志愿者的前沿到前沿和内边缘到内边缘惯例中的前缘到内边缘惯例测量
8. Low-Speed Wind-Tunnel Measurements on a Thin Sharp-Edged Delta Wing with 700 Leading-Edge Sweep, with Particular Reference to the Position of Leading-Edge-Vortex Breakdown [R] . J. A. Lawford, A. R. Beauchamp 1963

机译：具有700个前沿扫描的薄边缘三角翼上的低速风洞测量，特别参考前沿涡旋击穿的位置

LEADING EDGE

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