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Analysis and modelling of icing of air intake protection grids of aircraft engines

机译：飞机发动机进气保护格栅结冰的分析与建模

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摘要

Icing represents a major problem in the aviation industry. While icing of aerodynamic surfaces such as airfoils due to the impingement of supercooled liquid water droplets is widely studied, even if not yet fully understood, icing of supporting structures like protection grids of engine air intakes has been investigated to a lesser extent. An optimization of the design of the grids will help to reduce icing severity and delaying or avoiding loss of efficiency that could lead to hazardous situations.The present study investigates the icing behaviour of stainless steel protection grids in use on rotorcraft and turboprop engines. New experimental and analytical tools were developed to enable a quantitative study of grid icing under representative icing conditions in a lab-scale icing wind tunnel. The variation of the most relevant parameters like liquid water content of the cloud, airspeed, ambient temperature and mesh size of the grid allowed the identification of their influence on the icing behaviour. Further analysis of the experimental data led to the development and validation of a general physical model for ice accretion on grid structures.
机译：结冰是航空业的一个主要问题。尽管已经广泛研究了由于过冷液滴的撞击而导致的空气动力学表面（例如机翼）的结冰，但即使尚未完全了解，对发动机进气口保护格栅等支撑结构的结冰程度也进行了较小的研究。格栅设计的优化将有助于降低结冰的严重性，并延迟或避免可能导致危险情况的效率损失。本研究调查了旋翼飞机和涡轮螺旋桨发动机上使用的不锈钢保护格栅的结冰行为。开发了新的实验和分析工具，可以在具有代表性的结冰条件下，在实验室规模的结冰风洞中对网格结冰进行定量研究。最相关的参数（例如云中的液态水含量，空速，环境温度和网格的网格大小）的变化可以确定其对结冰行为的影响。对实验数据的进一步分析导致开发并验证了网格结构上积冰的通用物理模型。

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  • 来源
    《Cold regions science and technology》 |2019年第4期|265-272|共8页
  • 作者

    Vercillo Vittorio; Karpen Norbert; Laroche Alexandre; Guillen Javier Alejandro Mayen; Tonnicchia Simone; Jorge Raphael de Andrade; Bonaccurso Elmar;

  • 作者单位

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany|Tech Univ Dresden, Inst Mfg Technol, George Bahr Str 3c, D-01069 Dresden, Germany;

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany|Tech Univ Darmstadt, Inst Fluid Mech & Aerodynam, Alarich Weiss Str 10, D-64287 Darmstadt, Germany;

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany|Concordia Univ, Dept Mech Ind & Aerosp Engn, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada;

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany|Ecole Super Chim Phys Elect CPE Lyon, Chim Genie Proc, 43 Blvd 11 Novembre 1918, F-69100 Villeurbanne, France;

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany|Sapienza Univ Rome, Dept Chem Engn Mat Environm, INSTM Lab Engn Surface Treatments, Via Eudossiana 18, I-00184 Rome, Italy;

    Univ Sao Paulo, Sao Carlos Sch Engn, Dept Aeronaut Engn, BR-13568250 Sao Carlos, SP, Brazil;

    Airbus Cent Res & Technol, Mat 10, Willy Messerschmitt Str 1, D-82024 Taufkirchen, Germany;

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