Aircraft engine dust ingestion following sand storms
Aircraft engine dust ingestion following sand storms
复制标题
沙尘暴后飞机发动机吸入灰尘
DOI：
10.1016/j.ast.2020.106072
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发表时间：
2020
影响因子：
5.6
通讯作者：
R. Clarkson
中科院分区：
文献类型：
--
作者：
N. Bojdo;A. Filippone;B. Parkes;R. Clarkson
在世界一些地区运营的商用飞机受到恶劣的大气条件的影响，这可能会影响现代航空发动机的效率和完整性。在这篇文章中调查的条件是沙尘暴后的沙尘大气。具体地说，在多哈机场(IATA：HIA)运营的一架空中客车A380-841(劳斯莱斯Trent 900)的发动机吸入的粉尘是通过模拟三个单独日历月的爬升轨迹估计的，在这三个月期间发现了一些沙尘暴。大气模式纳入了欧洲中期天气预报中心(ECMWF)近乎实时的哥白尼大气监测服务数据库的沙尘浓度后预测。总共考虑了365次飞行。每一次飞行吸入发动机核心的平均粉尘质量估计为∼8.5g。利用压气机污垢预测模型，吸入粉尘使渐近恶化速率时间常数减小了∼8倍。这次飞行被标记为非飞行，在此期间，吸入发动机核心的总粉尘质量比月平均水平高出两个标准差。粉尘摄入量的峰值为22毫克/S，出现在起飞后不久，即第一个爬升段的中途。第二个高峰出现在飞机从3000英尺到10000英尺的爬升过程中。最后，在波斯湾上空20分钟的停留模式中吸入的尘埃估计为∼8克，大致相当于在尘土飞扬的一天攀登时吸入的尘埃。结果表明，基于任务的方法对于确定多尘环境中飞机发动机的耐久性可能更有用。
Commercial aircraft operating in some regions of the world are subject to harsh atmospheric conditions that can affect the efficiency and integrity of modern aero-engines. Conditions that are investigated in this contribution are dusty atmospheres following sand storms. Specifically, the dust ingested by the engines of an Airbus A380-841 (Rolls-Royce Trent 900) operating out of Doha airport (IATA: HIA) is estimated by simulating climb-out trajectories over three separate calendar months during which a number of sand storms have been identified. The atmosphere model incorporates dust concentration hind-casts from the European Centre for Medium-Range Weather Forecasts (ECMWF) near real-time Copernicus Atmosphere Monitoring Service database. A total of 365 flights were considered. The average dust mass ingested into the engine core per flight is estimated as ∼8.5 g. Using a compressor fouling prediction model, the dust ingestion reduces the asymptotic deterioration rate time constant by a factor ∼8. The worst dust storm within the time frame considered is selected for further examination. This flight is flagged as adust-flight, during which the total mass of dust ingested into the engine core exceeds the monthly mean by two standard deviations. A peak dust ingestion rate of 22 mg/s occurs shortly after take-off, midway through the first climb segment. A second peak presents as the aircraft transitions into the climb from 3,000 feet to 10,000 feet. Finally, the dust ingested during a 20-minute holding pattern over the Persian Gulf is estimated as ∼8 g, which is approximately the same as the dust ingested during climb-out on a very dusty day. The results suggest that a mission-based approach may be more useful for determining aircraft engine durability in dusty environments.