Airflow and Water-Drop Trajectories at Instrument Sampling Points around the Beechcraft King Air and Lockheed Electra
Airflow and Water-Drop Trajectories at Instrument Sampling Points around the Beechcraft King Air and Lockheed Electra
复制标题
Beechcraft King Air 和 Lockheed Electra 周围仪器采样点的气流和水滴轨迹
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
D. Rogers
中科院分区：
文献类型：
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作者：
C. Twohy;D. Rogers
摘要 由于气流流线的扭曲，在移动的飞机周围测量的流速和液滴尺寸分布可能与自由流条件不同。这会使飞机平台的测量变得复杂。势流计算用于预测 Lockheed Electra L-188 和 Beechcraft King Air-200 飞机周围各种仪器安装位置的气流特征和不同尺寸液滴的空间分布。两架飞机靠近机身的某些位置以及大曲率区域都发现与自由流条件存在较大偏差。直径100-200μm的液滴的数量浓度受流动畸变效应的影响最为严重。计算结果与空中国王前部安装位置的测量结果相当一致。
Abstract Due to distortion of airflow streamlines, flow velocities and droplet size distributions measured around a moving aircraft can differ from freestream conditions. This can complicate measurements made from aircraft platforms. Potential flow calculations were used to predict airflow characteristics and the spatial distribution of different-sized droplets around the Lockheed Electra L-188 and Beechcraft King Air-200 aircraft at a variety of instrument mounting locations. Large deviations from freestream conditions were found to occur at certain locations on both aircraft near the fuselage and in regions of strong curvature. The number concentration of droplets 100–200 µm in diameter is most seriously affected by flow distortion effects. Calculation results were in reasonable agreement with measurements at a forward mounting location on the King Air.