In this work, rotors with artificial ice shapes are studied to develop an insight into the potential of acoustics-based ice detection. Using the Helicopter Multi-Block CFD solver, approximate ice shapes are added to the blades and the results are analyzed using the Ffowcs Williams–Hawkings method. Several candidate monitoring positions are assessed for acoustic sensors to be placed on the helicopter fuselage. The influence of ice on the aero-acoustic characteristics of a rotor is calculated, and parameters such as the ice amount and the icing position on the blade are quantified. It is concluded that an array of microphones is best for detecting potential icing position on the blades, and it should be located on top of the helicopter rear fuselage and along the tail-boom.

中文翻译：

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冰检测转子气动声学特性数值分析

在这项工作中，研究了具有人造冰形状的转子，以深入了解基于声学的冰检测的潜力。使用 Helicopter Multi-Block CFD 求解器，将近似冰形状添加到叶片，并使用 Ffowcs Williams-Hawkings 方法分析结果。评估了几个候选监测位置，用于放置在直升机机身上的声学传感器。计算结冰对旋翼气动声学特性的影响，量化结冰量、叶片结冰位置等参数。得出的结论是，麦克风阵列最适合检测叶片上潜在的结冰位置，它应该位于直升机后机身顶部和尾梁上。