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Fluid dynamic analysis of pollutants’ dispersion behind an aircraft engine during idling

机译：空转期间污染物在飞机发动机后方扩散的流体动力学分析

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摘要

The potential impact of emissions from airports on human health and air quality has become a significant issue. The aim of this paper is to investigate the dispersion behind an aircraft engine during idle-engine operations at airports. When these operations are conducted on the apron, jet engine emissions worsen the air quality where ground handling personnel works and passengers embark or disembark. Ground operations at airports are designed according to the International Civil Aviation Organization jet blast definition that indicates the exhaust gas velocity of 56 km/h as the threshold limit for the comfort of operations behind an aircraft, without considering the pollutants’ dispersion and concentration levels. In this paper, carbon monoxide (CO), formaldehyde (CH2O), and acrolein (C3H4O) dispersion behind a twin engine jet aircraft during idling is investigated using a computational fluid dynamic tool. The complete geometry of a Boeing 737-500 is used as reference. The steady-state simulation of turbulent jet flow is carried out using a realizable k − ε model. Three different scenarios are investigated at standard day conditions—101,325 Pa and 288 K, with no wind, and the plume concentrations are presented and discussed. CO, CH2O, and C3H4O concentration curves are drawn and compared with the exposure threshold limit defined by scientific international communities to guarantee human health. The information provided from this study represents a first step in understanding apron air quality issues during idle-engine operations.
机译：机场排放物对人类健康和空气质量的潜在影响已成为一个重要问题。本文的目的是研究在机场怠速发动机运行期间飞机发动机背后的扩散。在停机坪上进行这些操作时，喷气发动机的排放会恶化地勤人员工作，乘客上下飞机的空气质量。机场的地面运行是根据国际民航组织的喷射爆炸定义设计的，该定义表明56 km / h的排气速度是飞机后方操作舒适性的阈值限制，而未考虑污染物的扩散和浓度水平。在本文中，使用计算流体动力学工具研究了在空转时双引擎喷气飞机后的一氧化碳（CO），甲醛（CH2O）和丙烯醛（C3H4O）分散体。一架波音737-500的完整几何形状用作参考。使用可实现的k-εε模型进行湍流射流的稳态仿真。在标准的日间条件下，研究了三种不同的情况-101,325 Pa和288 K，没有风，并且介绍并讨论了羽流浓度。绘制了CO，CH2O和C3H4O浓度曲线，并将其与国际科学界为确保人类健康而定义的暴露阈值极限进行比较。这项研究提供的信息代表了了解怠速发动机运行期间停机坪空气质量问题的第一步。

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  • 来源
    《Air quality, atmosphere & health》 |2013年第2期|367-383|共17页
  • 作者

    Enrico Testa; Calogero Giammusso; Massimo Bruno; Paolo Maggiore;

  • 作者单位

    1.Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Turin Italy;

    1.Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Turin Italy;

    1.Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Turin Italy;

    1.Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Turin Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pollutants’ dispersion; CFD; Jet-engine emissions; Airport air quality; Jet blast; Hydrocarbons;

    机译：污染物扩散;差价合约;喷气发动机排放物;机场空气质量;喷射爆炸;碳氢化合物;

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