Abstract Enhanced soiling is frequently observed near the multi-slot cabin supply air nozzles in twin-aisle commercial airplanes, which would increase the cleaning and maintenance costs. This study proposed a computer-aided design approach to develop a new cabin supply air nozzle for reducing particle deposition in commercial airplanes. In the new nozzle, the slot dividers were removed to reduce particle deposition, while the shape of the plenum was re-designed using computational fluid dynamics (CFD) to ensure supply air uniformity. The new nozzles were fabricated using a 3D printing technique. The performance of the new cabin supply air nozzles was compared with that of the original multi-slot nozzles by both experimental measurements and numerical simulations, in terms of supply air velocity distribution, particle deposition, pressure drop, noise level, and weight. The results show that the new cabin supply air nozzles can significantly reduce particle deposition on the target surface in comparison to the original multi-slot nozzles, while providing similar airflow and temperature distributions in the aircraft cabin. Furthermore, the new nozzles exhibited better supply air uniformity, lower pressure drop, lower noise level, and were lighter in weight than the original multi-slot nozzles.

中文翻译：

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用于减少颗粒沉积的商用飞机新型机舱供气喷嘴的计算机辅助设计

摘要 双通道商用飞机的多槽座舱供气喷嘴附近经常出现严重的污染，这会增加清洁和维护成本。这项研究提出了一种计算机辅助设计方法来开发一种新的机舱供气喷嘴，以减少商用飞机中的颗粒沉积。在新喷嘴中，狭缝分隔器被移除以减少颗粒沉积，同时使用计算流体动力学 (CFD) 重新设计增压室的形状以确保供应空气的均匀性。新喷嘴是使用 3D 打印技术制造的。通过实验测量和数值模拟，将新型机舱送风喷嘴的性能与原始多槽喷嘴在送风速度分布、颗粒沉积、压降、噪音水平和重量。结果表明，与原始多槽喷嘴相比，新型机舱供气喷嘴可以显着减少目标表面的颗粒沉积，同时在飞机机舱内提供相似的气流和温度分布。此外，新喷嘴表现出更好的送风均匀性、更低的压降、更低的噪音水平，并且比原来的多槽喷嘴更轻。