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<p>Nowadays, significant effort is being dedicated to the development of laminar flow technologies for next-generation aircraft. Laminar flow is expected to reduce drag on aircraft wings, thereby decreasing environmental pollution and costs associated with kerosene consumption. However, three-dimensional disturbances, such as insect residues, can cause a breakdown in laminar airflow if they exceed a certain threshold height. As a result, these residues need to be removed regularly. Laser-based processes, such as shockwave-based laser cleaning, could offer an efficient solution in terms of cleaning rate and effectiveness, without requiring additional media such as water or chemicals. This study investigates the cleaning effects on artificially created insect residues on stainless steel (1.4544.9) and Titanium Grade 5 using shockwave-based laser cleaning and a TEA-CO2 laser. The cleaned areas were analyzed for process influence on the base material using microhardness measurements, CLSM, and SEM imaging to assess the topography and grain structure. This paper demonstrates a method to significantly reduce insect residue by 84% without any observable alteration to the base material in terms of hardness, topography, or grain structure. It provides a foundation for a laser-based cleaning procedure that enables regular cleaning of contaminated metallic surfaces.</p>

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Laser Cleaning of Insect Residue with a TEA-CO2 -Laser in Shockwave Regime

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • L. Rathmann,
  • T. Radel

摘要

Nowadays, significant effort is being dedicated to the development of laminar flow technologies for next-generation aircraft. Laminar flow is expected to reduce drag on aircraft wings, thereby decreasing environmental pollution and costs associated with kerosene consumption. However, three-dimensional disturbances, such as insect residues, can cause a breakdown in laminar airflow if they exceed a certain threshold height. As a result, these residues need to be removed regularly. Laser-based processes, such as shockwave-based laser cleaning, could offer an efficient solution in terms of cleaning rate and effectiveness, without requiring additional media such as water or chemicals. This study investigates the cleaning effects on artificially created insect residues on stainless steel (1.4544.9) and Titanium Grade 5 using shockwave-based laser cleaning and a TEA-CO2 laser. The cleaned areas were analyzed for process influence on the base material using microhardness measurements, CLSM, and SEM imaging to assess the topography and grain structure. This paper demonstrates a method to significantly reduce insect residue by 84% without any observable alteration to the base material in terms of hardness, topography, or grain structure. It provides a foundation for a laser-based cleaning procedure that enables regular cleaning of contaminated metallic surfaces.