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首页> 外文期刊>Journal of aerospace engineering >Air Cooling of a Two-Seater Fuel Cell-Powered Aircraft: Dynamic Modeling and Comparison with Experimental Data
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Air Cooling of a Two-Seater Fuel Cell-Powered Aircraft: Dynamic Modeling and Comparison with Experimental Data

机译：两座燃料电池飞机的空气冷却：动态建模和实验数据比较

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The application of fuel cell (FC) technology to aircraft propulsion and/or energy supply is becoming of great interest for undoubted advantages in terms of pollution emissions and noise reduction. A better understanding of problems related to fuel cells applied to aeronautics is sought by the European Commission (EC) funded project Environmentally Friendly Inter-City Aircraft Powered by Fuel Cells (ENFICA-FC). The main objective of the ENFICA-FC project was to develop and validate the use of a fuel cell-based power system for the propulsion of more-electric/all-electric aircraft. The fuel cell system was installed in the light sport aircraft Rapid 200, which was flight and performance tested. One of the key items under investigation is the simulation of the cooling system and the evaluation of fuel cell temperature. The polymer electrolyte membrane fuel cell (PEMFC) is considered to be the best candidate for the fuel cell vehicle because it has high power density, solid membrane electrolyte, and as it operates at low temperatures, it has a fast start-up. However, to generate a reliable and efficient power response and to prevent membrane degradation or damage with hydrogen and oxygen depletion, a sophisticated control technique becomes vitally important. In particular, as the ionic conduction of the polymeric membrane is a function of its degree of humidi-fication, the stack temperature has to be carefully controlled to avoid phenomena of water evaporation, causing an increase of ohmic drop and a decrease of stack performances. The output voltage and hence the power of the fuel cell system is affected considerably by the change of the stack temperature. A simplified fluid-dynamic model has been developed and validated by computational fluid dynamics (CFD) analysis and it is used to compute the air flow to the fuel cell heat-exchanger inlet. Propeller effects are included referring to an optimal propeller specifically designed for the ENFICA-FC project. A mathematical model of the fuel cell system dynamics coupled with the fluid-dynamic model was studied in detail and experimentally validated during two flight tests of the Rapid 200-FC.
机译：燃料电池（FC）技术在飞机推进和/或能源供应中的应用正因在污染排放和降噪方面的无疑优势而受到广泛关注。欧盟委员会（EC）资助的由燃料电池驱动的城市间环保飞机项目（ENFICA-FC）寻求对与航空燃料电池相关的问题有更好的理解。 ENFICA-FC项目的主要目标是开发和验证基于燃料电池的动力系统用于推进更多电/全电飞机的动力。燃料电池系统安装在轻型运动飞机Rapid 200上，该飞机已经过飞行和性能测试。研究中的关键项目之一是冷却系统的仿真和燃料电池温度的评估。聚合物电解质膜燃料电池（PEMFC）被认为是燃料电池车辆的最佳选择，因为它具有高功率密度，固体膜电解质，并且由于其在低温下运行，因此具有快速启动的能力。然而，为了产生可靠而有效的功率响应并防止膜降解或氢和氧消耗引起的损坏，复杂的控制技术至关重要。特别地，由于聚合物膜的离子传导是其加湿程度的函数，因此必须小心地控制烟囱温度以避免水蒸发现象，从而导致欧姆降的增加和烟囱性能的降低。燃料电池系统的输出电压以及因此的功率受到堆温度的变化的相当大的影响。已经开发了简化的流体动力学模型，并通过计算流体动力学（CFD）分析进行了验证，该模型用于计算流向燃料电池热交换器入口的空气流量。螺旋桨效应是指为ENFICA-FC项目专门设计的最佳螺旋桨。在Rapid 200-FC的两次飞行测试中，对燃料电池系统动力学的数学模型与流体动力学模型进行了详细研究，并进行了实验验证。

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