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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >NEAR-FIELD MEASUREMENTS ON CONTRAIL PROPERTIES FROM FUELS WITH DIFFERENT SULFUR CONTENT
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NEAR-FIELD MEASUREMENTS ON CONTRAIL PROPERTIES FROM FUELS WITH DIFFERENT SULFUR CONTENT

机译：含硫量不同的燃料的对比度性能近场测量

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摘要

Microphysical properties of jet exhaust aerosol and contrails were studied in the near field of the emitting aircraft for different fuel sulfur contents. Measurements were performed behind two different aircraft (ATTAS test aircraft pf type VFW 614 and Airbus A310-300) using fuels with sulfur contents of 6 ppm and 2700 ppm, respectively. At closest approach (plume age < 1 s), the total number concentrations exceeded the measuring range of the condensation particle counter, i.e., N. 10(5) cm(-3), The concentration of the dry accumulation mode aerosol, i.e., predominantly soot particles, was not affected by the fuel sulfur content. At a plume age of 10 s, an increase in total number concentration (D-p > 0.01 mu m) by a factor of 3.5 in the high sulfur case compared to the low sulfur case was observed. The ultrafine condensation nuclei fraction (0.007 mu m < D-p < 0.018 mu m) contributed at maximum 70% to the total aerosol in the plume while this fraction was much less outside the plume. The high fuel sulfur content also caused an increase in the typical number concentrations of contrail particles by about One third with respect to low sulfur fuel, while the effective diameter of the size distribution was lowered at a fuel sulfur independent ice water content. The major differences in accumulation mode aerosol and microphysical contrail properties between the used aircraft were an increased number concentration of both the accumulation mode aerosol and the contrail particles in the Airbus A310-300 plume relative to the ATTAS plume. Part of the difference in contrail particles may be caused by different ambient conditions, but the major differences are assumed to be caused by different engine and wake properties. [References: 39]
机译：在不同燃料硫含量的情况下，在发射飞机的近场中研究了喷射气溶胶和凝结尾迹的微物理性质。在两架不同的飞机（ATTAS试验飞机，型号为VFW 614和空中客车A310-300）之后，分别使用含硫量为6 ppm和2700 ppm的燃料进行了测量。在最接近的方式下（浮尘年龄<1 s），总浓度超过了冷凝粒子计数器的测量范围，即N. 10（5）cm（-3），干积聚模式气溶胶的浓度，即烟尘颗粒主要不受燃料硫含量的影响。在10 s的烟羽年龄下，与低硫情况相比，在高硫情况下观察到总数浓度（D-p> 0.01μm）增加了3.5倍。超细冷凝核部分（0.007μm

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