A Fundamental Study on Unsteady Heat Transfer and Dynamic Ice Accretion Processes Pertinent to UAV Icing Protection

与无人机防冰相关的非稳态传热和动态积冰过程的基础研究

• 批准号: 2313310
• 负责人: Hui Hu
• 金额: $ 34.63万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2313310&HistoricalAwards=false
• 关键词: Fundamental; Study; Unsteady; Heat; Transfer

Unmanned-Aerial-Vehicles (UAVs), also known as Drones, is one of the most remarkable developments in the aviation community with emerging civilian and military applications. Unlike conventional, large-sized, manned aircraft cruising at high altitudes, light-weighted UAVs are designed specifically to fly in low-altitude airspace, thus, are much more vulnerable to the impacts of icing weather such as frozen rain, snow, and sleet. Current UAV icing avoidance strategy is either keeping UAVs on the ground or modifying their flight paths, thereby, greatly reducing the UAV operation capability in cold climate. This is particularly troubling for life-saving search & rescue operations and military UAV applications, in which icing conditions would lead to aborted missions and loss of crucial tactical capabilities. This project aims to improve our understanding about the underlying UAV icing physics and to develop novel anti-/de-icing strategies for assured UAV flight safety in all weather conditions. The project will also encompass significant educational activities, including a multi-year graduate/undergraduate research program, development of new teaching modules, and an outreach program for local K-12 students with a focus of promoting the participation of female students and those from under-represented minority (URM) groups.The goal of this project is to conduct a fundamental study to characterize the important micro-physical processes (i.e., unsteady heat transfer, transient surface water runback, and dynamic ice accretion process) pertinent to UAV inflight icing phenomena. The effects of the surface properties (e.g., hydrophobicity and thermal conductivity) on the dynamic ice accretion process over UAV wings and rotating propellers will be evaluated systematically. An explorative study will be performed to develop a new class of low-power and effective strategies for UAV inflight icing mitigation. A comprehensive outdoor flight test campaign will also be conducted to fly experimental UAVs in atmospheric icing weather (e.g., snow, frozen rain, and sleet) to fill the knowledge gaps between the idealized lab experiments and realistic UAV inflight icing process. The proposed research would significantly improve our understanding about the underlying UAV icing physics. It will also lead to a new class of low-power and effective anti-/de-icing strategies for assured UAV flight safety in all weather conditions, which are very critical to life-saving search & rescue operations and military UAV applications of America’s defense and national security concerns.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

无人机（UAV），也称为无人机，是航空界最引人注目的发展之一，具有新兴的民用和军用应用，与高空巡航的传统大型有人驾驶飞机不同，轻型无人机。无人机专门设计用于低空空域飞行，因此更容易受到冻雨、雪、雨夹雪等结冰天气的影响。目前的无人机防结冰策略是：无人机在地面上或改变其飞行路径，从而大大降低了无人机在寒冷气候下的操作能力，这对于救生搜救行动和军用无人机应用来说尤其令人不安，在这些情况下，结冰条件会导致任务中止和损失。该项目旨在提高我们对无人机结冰物理学的理解，并开发新颖的防/除冰策略，以确保无人机在所有天气条件下的飞行安全。该项目还将包括重要的教育活动，包括多项活动。 -年研究生/本科生研究计划、新教学模块的开发以及针对当地 K-12 学生的外展计划，重点是促进女学生和代表性不足的少数群体 (URM) 的参与。该项目的目标是进行基础研究，以表征与无人机飞行中结冰现象相关的重要微观物理过程（即非稳态传热、瞬态地表水回流和动态积冰过程）对表面特性的影响。将系统地评估无人机机翼和旋转螺旋桨上的动态积冰过程（例如疏水性和导热性），以开发新型低功率且有效的无人机飞行结冰缓解策略。还将开展综合性户外飞行测试活动，在大气结冰天气（例如雪、冻雨和雨夹雪）下飞行实验无人机，以填补理想实验室实验与现实之间的知识差距无人机飞行中结冰过程。拟议的研究将显着提高我们对无人机结冰物理学的理解，还将带来一种新型的低功率和有效的防冰/除冰策略，以确保无人机在所有天气条件下的飞行安全。 ，这对于美国国防和国家安全问题的救生搜救行动和军用无人机应用非常关键。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Comparative Study of Using Superhydrophobic and Icephobic Surface Coatings for Aircraft Icing Mitigation

使用超疏水和疏冰表面涂层进行飞机防冰的比较研究

• DOI: 10.2514/1.j063579
• 发表时间: 2024-01-30
• 期刊: AIAA Journal
• 影响因子: 2.5
• 作者: Haiyang Hu;L. Tian;Chukwudum Eluchie;Harsha Sista;Hui Hu
• 通讯作者: Hui Hu