Cryogenic sloshing in aircraft fuel tanks

飞机油箱中的低温晃动

• 批准号: 2591053
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2591053
• 关键词: Cryogenic; sloshing; aircraft; fuel; tanks

Fuel sloshing in cryogenic tanks is known to have important effects on the thermodynamics in the ullage space, potentially leading to significant pressure drops and consequent inability to extract the fuel from the tank. Due to the cryogenic environment, rotating machinery such as pumps are complex to install and operate reliably, therefore the characterisation of free surface sloshing is of paramount importance for the effective design of liquid hydrogen (LH2) storage systems in next-generation civil aircraft applications.Several non-intrusive measurement techniques exist for the characterization of multiple phase (liquid/gas) flow regimes in pipes/channels. These methods are based on a variety of measurements acquired via standard sensors mounted on the outside wall of the pipe (accelerometers, strain gauges, microphones or optical sensors); advanced signal processing techniques, such as wavelet analysis; and knowledge of the flow regime based on image analysis and particle velocimetry.In this project, these techniques will be developed further to measure, and characterise, the sloshing flow (and the configuration of the liquid free surface) within cryogenic tanks on-board Airbus' ZEROe hybrid-hydrogen concept aircraft. Since the sloshing (to first approximation) is independent of liquid density and the pressure in the tank, the methods will first be calibrated via visual analysis and particle velocimetry in laboratory tests on liquid/gas systems at room temperature (where visual access to the free surface is attainable).

众所周知，低温罐中的燃料对热力学空间中的热力学有重要影响，可能导致大量压降，因此无法从油箱中提取燃料。由于低温环境，诸如泵之类的旋转机械非常复杂，可以可靠地安装和操作，因此，在下一代民用飞机应用中，自由表面倾斜度的表征对于有效设计液体氢（LH2）存储系统至关重要。存在几种非侵入性测量技术，用于表征管道/通道中多相（液体/气体）流动状态。这些方法基于通过安装在管道外壁（加速度计，应变计，麦克风或光学传感器）的标准传感器获得的多种测量值；高级信号处理技术，例如小波分析；以及基于图像分析和粒子速度法的知识。在该项目中，将进一步开发这些技术，以测量和表征在板上空气库中的摇式流动（以及液体不含液体表面的构型） 'Zeroe混合杂种概念飞机。由于倾斜度（第一次近似）独立于液体密度和油箱中的压力，因此在室温下对液体/气体系统的实验室测试中，将首先通过视觉分析和粒子速度来校准该方法表面是可以实现的）。