Optimisation of Proprotors for Performance and Noise

Proprotor 的性能和噪声优化

• 批准号: 2751380
• 金额: --
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2751380
• 关键词: Optimisation; Proprotors; Performance; Noise

With the global drive towards more sustainable aviation, new electric aircraft platforms are being developed. These may be smaller scale battery-powered drone craft, or as large as commercial aircraft with hydrogen-electric powertrains. There is also the desire for such craft to have vertical take-off and landing capacities, for use as inter-city flying taxis. Such powertrains are most commonly driven by propellers, but there exists a lack of design and validation tools for optimising these for this new role. In addition, for commercial aircraft, the transition from turboprop to hydrogen-electric powertrains results in the scope for aeroacoustic research. Previously, the noise generated by a propeller on such an aircraft was secondary, and thus not considered as a primary design parameter. With the shift in focus towards sustainable, "silent" flight in dense urban areas, the noise disturbance to the public is becoming a significant factor. Limited research exists in the design of a propeller for noise, particularly when considering VTOL, and the transition to cruise flight. This research aims to occupy this space, through the following objectives: Design, build, and commission a propeller test rig and compare against published data Develop a propeller performance and geometry optimisation code (Bath BEMT software) Validate the BEMT code by correlating its predictions to rig tests in horizontal, vertical, and transitional flight Implement noise considerations into the design process, and validate these through acoustic testing of propellers on the rig with microphone arraysThese objectives will result in a comprehensive and validated design tool for the next generation of propeller-driven aircraft. Given mission parameters and requirements, such as for noise, thrust, torque, and efficiency, an optimal propeller will be generated. Such propellers could then be implemented onto aircraft of the types and applications listed above. This research will focus particularly on the low Reynolds number, high angle-of-attack, VTOL-cruise transition, and post-stall influences on propeller design, as these remain the least validated when applying BEMT modelling.The ability to generate optimised propellers for these eVTOL applications will permit the advancement of the design of these novel aerospace platforms, while maximising their propulsive efficiencies, and minimising the acoustic annoyance to the public. The successful implementation of high-efficiency, quiet propellers onto commercial aircraft will accelerate the transition away from fossil-fuel powered flight by increasing the feasibility of sustainable aviation through alternative propulsive systems.

随着全球对更可持续航空的推动，新的电动飞机平台正在开发中。这些可能是较小规模的电池供电的无人机，或者像氢电动力系统的商用飞机一样大。人们还希望这种飞行器具有垂直起飞和降落能力，用作城市间的飞行出租车。这种动力系统最常见的是由螺旋桨驱动，但缺乏设计和验证工具来优化这些新角色。此外，对于商用飞机，从涡轮螺旋桨到氢电动力系统的过渡导致了航空声学研究的范围。以前，这种飞机上螺旋桨产生的噪声是次要的，因此不被认为是主要的设计参数。随着人口稠密的城市地区的重点转向可持续、“静音”飞行，噪音对公众的干扰正在成为一个重要因素。有限的研究存在于噪声的螺旋桨的设计，特别是当考虑垂直起落，和过渡到巡航飞行。本研究旨在通过以下目标占据这一空间：设计、建造和调试螺旋桨试验台，并与已发布的数据进行比较开发螺旋桨性能和几何优化代码（Bath BEMT软件）通过将BEMT代码的预测与水平、垂直和过渡飞行中的台架试验相关联来验证BEMT代码。并通过在带有麦克风阵列的试验台上对螺旋桨进行声学测试来验证这些目标。这些目标将为下一代螺旋桨驱动飞机提供一个全面的、经过验证的设计工具。给定使命参数和要求，例如噪声、推力、扭矩和效率，将生成最佳螺旋桨。这样的螺旋桨然后可以被实施到上面列出的类型和应用的飞行器上。这项研究将特别侧重于低雷诺数、大迎角、垂直起降巡航过渡和过失速对螺旋桨设计的影响，因为这些在应用BEMT建模时仍然是验证最少的。为这些eVTOL应用生成优化螺旋桨的能力将允许这些新型航空航天平台的设计进步，同时最大限度地提高其推进效率，并且最小化对公众的声学干扰。在商用飞机上成功实现高效、安静的螺旋桨，将通过替代推进系统增加可持续航空的可行性，加速从化石燃料动力飞行的过渡。