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

机译：飞机发动机进气网结冰的分析与建模

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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：结冰代表了航空业的一个主要问题。虽然广泛地研究了由于过冷却液体水滴的冲击而诸如翼型的空气动力学表面，但是即使尚未完全理解，已经在较小程度上研究了发动机空气摄入量的保护网格的支撑结构的结冰。该网格设计的优化将有助于减少僵硬的严重程度和延迟或避免可能导致危险情况的效率损失。目前的研究调查了在旋翼飞机和涡轮螺旋桨发动机上使用的不锈钢保护网格的结冰行为。开发了新的实验和分析工具，以使实验室冰风隧道的代表性糖霜条件下的网格结冰进行定量研究。云，空速，环境温度和网格尺寸的液体含水量等最相关参数的变化允许识别它们对糖化行为的影响。进一步分析实验数据导致了对网格结构冰增冰一般物理模型的开发和验证。

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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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