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Airport emissions reductions from reduced thrust takeoff operations

机译：通过减少推力起飞操作来减少机场排放

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Given forecast aviation growth, many airports are predicted to reach capacity and require expansion. However, pressure to meet air quality regulations emphasises the importance of efficient ground-level aircraft activities to facilitate growth. Operational strategies such as reducing engine thrust setting at takeoff can reduce fuel consumption and pollutant emissions; however, quantification of the benefits and consistency of its use have been limited by data restrictions. Using 3336 high-resolution flight data records, this paper analyses the impact of reduced thrust takeoff at London Heathrow. Results indicate that using reduced thrust takeoff reduces fuel consumption, nitrogen oxides (NOx) and black carbon (BC) emissions by 1.0-23.2%, 10.7-47.7%, and 49.0-71.7% respectively, depending on aircraft-engine combinations relative to 100% thrust takeoff. Variability in thrust settings for the same aircraft-engine combination and dependence on takeoff weight (TOW) is quantified. Consequently, aircraft-engine specific optimum takeoff thrust settings that minimise fuel consumption and pollutant emissions for different aircraft TOWs are presented. Further reductions of 1.9%, 5.8% and 6.5% for fuel consumption, NOx and BC emissions could be achieved, equating to reductions of approximately 0.4%, 3.5% and 3.3% in total ground level fuel consumption, NOx and BC emissions. These results quantify the contribution that reduced thrust operations offer towards achieving industry environmental targets and air quality compliance, and imply that the current implementation of reduced thrust takeoff at Heathrow is near optimal, considering operational and safety constraints. (C) 2017 The Authors. Published by Elsevier Ltd.
机译：根据航空业的增长预测，预计许多机场将达到运力并需要扩展。但是，满足空气质量法规的压力强调了有效的地面飞机活动对促进增长的重要性。减少起飞时的发动机推力设置等操作策略可以减少燃油消耗和污染物排放；但是，由于数据限制，量化收益和使用一致性一直受到限制。本文使用3336个高分辨率飞行数据记录，分析了伦敦希思罗机场推力起飞减少的影响。结果表明，根据飞机发动机的组合（相对于100架），使用减少的推力起飞可分别减少燃料消耗，氮氧化物（NOx）和黑碳（BC）排放1.0-23.2％，10.7-47.7％和49.0-71.7％。推力起飞百分比。量化了相同飞机发动机组合的推力设置的变化以及对起飞重量（TOW）的依赖性。因此，提出了针对飞机发动机的最佳起飞推力设置，该设置将不同飞机TOW的燃油消耗和污染物排放降至最低。可以进一步减少1.9％，5.8％和6.5％的油耗，NOx和BC排放，相当于将地面总油耗，NOx和BC排放减少约0.4％，3.5％和3.3％。这些结果量化了减少推力操作对实现行业环境目标和空气质量合规性的贡献，并暗示考虑到操作和安全约束，希思罗机场目前减少推力起飞的实施接近最佳。 （C）2017作者。由Elsevier Ltd.发布

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