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Characterizing Instrumentation Canister Aerodynamics of FAAM BAe-146-301 Atmospheric Research Aircraft

机译：FAAM BAe-146-301大气研究飞机的仪表罐空气动力学特性

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摘要

A computational fluid dynamics (CFD) investigation was aimed at accurately predicting the air flow characteristics in the vicinity of underwing-mounted instruments on the Facility for Airborne Atmospheric Measurement's (FAAM) BAe-146-301. Perturbation of the free stream airflow as it passes through the region of detection of the underwing instruments may lead to additional uncertainties in the measurement of clouds and cloud particles. The CFD model was validated with flight data from an Aircraft-Integrated Meteorological Measurement System (AIMMS-20) in a wing-mounted instrument canister. Flow predictions showed a consistent slowing from the true air speed of the aircraft in the longitudinal direction and the introduction of horizontal and vertical flows up to 10% of the air speed. The potential impact of these flow perturbations on sizing of particles with cloud imaging probes was modeled. Sizing errors were dependent on the methodology used and the shape of the particle; those due to transverse flows remained very small but mis-sizing due to unaccounted longitudinal flow perturbations were potentially more serious. (c) 2019 American Society of Civil Engineers.
机译：计算流体动力学（CFD）研究旨在准确地预测机载大气测量设施（FAAM）BAe-146-301上安装在机翼下方的仪器附近的空气流动特性。当自由气流通过机翼下仪表的检测区域时，其扰动可能导致云和云颗粒测量中的其他不确定性。 CFD模型已通过机翼安装的仪器罐中的飞机集成气象测量系统（AIMMS-20）的飞行数据进行了验证。流量预测显示，飞机的真实风速在纵向方向上持续下降，而水平和垂直流的引入一直到风速的10％。这些流动扰动对云成像探针对颗粒尺寸的潜在影响进行了建模。尺寸误差取决于所使用的方法和颗粒的形状。由于横向流动引起的流量仍然很小，但由于未考虑纵向流动扰动而导致尺寸错误的情况可能更加严重。 （c）2019美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2019年第4期|04019047.1-04019047.8|共8页
  • 作者

    Bennett C. J.; Nott G. J.; Wellpott A.; Lawson N.; Delise M.; Woodcock B.; Gratton G. B.;

  • 作者单位

    Cranfield Univ, Natl Flying Lab Ctr, Sch Aerosp Transport & Mfg, Cranfield MK43 0AL, Beds, England;

    Cranfield Univ, Facil Airborne Atmospher Measurements, Bldg 146,Coll Rd, Cranfield MK43 0AL, Beds, England;

    Cranfield Univ, Facil Airborne Atmospher Measurements, Bldg 146,Coll Rd, Cranfield MK43 0AL, Beds, England;

    Cranfield Univ, Natl Flying Lab Ctr, Sch Aerosp Transport & Mfg, Cranfield MK43 0AL, Beds, England;

    Cranfield Univ, Natl Flying Lab Ctr, Sch Aerosp Transport & Mfg, Cranfield MK43 0AL, Beds, England;

    Aventech Res Inc, 756 Huronia Rd, Barrie, ON L4N 6C6, Canada;

    Cranfield Univ, Facil Airborne Atmospher Measurements, Bldg 146,Coll Rd, Cranfield MK43 0AL, Beds, England;

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