An Integrated Numerical and Experimental Study of Wind-Driven Water Film Flow Dynamics Pertinent to Wind Turbine Icing Phenomena
项目来源
项目主持人
项目受资助机构
项目编号
财政年度
立项时间
研究期限
项目级别
受资助金额
学科
学科代码
基金类别
关键词
参与者
参与机构
人员信息
机构信息
项目主管部门
项目官员
1.Development of a Digital Inline Holography Technique to Characterize Airborne Supercooled Water Droplets and Ice Crystals for Aircraft Icing Studies
- 关键词:
- Cold weather problems;Drop formation;Gas turbines;Aircraft icing;Aircraft surface;Atmospheric icing;Aviation hazards;Digital in-line holographies;Flight aerodynamics;Ice crystals;Supercooled water;Water droplets;Water ice
- Wang, Jincheng;Chumbley, Edward;Kumar, Amrit;Sista, Harsha;Hu, Hui;Kumar, M. Shyam;Hong, Jiarong
- 《AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025》
- 2025年
- January 6, 2025 - January 10, 2025
- Orlando, FL, United states
- 会议
Atmospheric icing on aircraft surfaces represents a significant aviation hazard that compromises flight safety and aerodynamic performance in cold weather conditions. Precise measurement of supercooled water droplets and ice crystal characteristics in cold environments is essential for accurate ice formation prediction. This study presents a comprehensive experimental investigation to develop an advanced digital inline holography (DIH) system capable of differentiating and characterizing supercooled water droplets and ice crystals within an icing research tunnel. The DIH system measures critical particle characteristics including liquid water content (LWC), median volume diameter (MVD), ice water content (IWC), and particle size/shape distribution. System validation was performed using standard NIST particles. Additionally, we propose a novel method for distinguishing between supercooled water droplets and ice crystals based on DIH measurements. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
...2.An Experimental Study to Characterize Dynamic Wind-Driven Runback of Water Droplets/Rivulets Over a Flat Surface
- 关键词:
- Aerodynamics;Boundary layer flow;Drop formation;Aircraft icing;Dynamic behaviors;Dynamic winds;Flat plate;Flatter surfaces;Icing phenomenons;Runback waters;Surface boundaries;Water droplets;Water surface tension
- Zhao, Yuan;Wang, Jincheng;Hu, Hui
- 《AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025》
- 2025年
- January 6, 2025 - January 10, 2025
- Orlando, FL, United states
- 会议
This study investigates the dynamic behavior of wind-driven water droplets over a flat plate, focusing on the interactions between runback water droplets/rivulets, water surface tension, and boundary layer airflow, which are critical for understanding aircraft icing phenomena. Using an integrated experimental setup combining Digital Image Projection (DIP) and Particle Image Velocimetry (PIV) techniques, time-resolved measurements were obtained to capture the deformation, movement, and flow characteristics of water droplets on a test plate under varying free stream velocities. The measurement results reveal that droplet motion is strongly influenced by both droplet size and airflow speed, with larger droplets exhibiting slower oscillations and a more stable motion compared to smaller droplets. The study highlights the complex interplay between aerodynamic forces and surface tension, which induces periodic oscillations in the front contact line of the droplets/rivulets. Furthermore, the PIV results show how the presence of the droplet disturbs the local airflow, altering boundary layer characteristics. These findings provide new insights into the important micro-physical processes of wind-driven droplet/rivulet runback and its effects in dynamic ice accretion, offering valuable database to validate/verify theoretical models and numerical simulations for more accurate prediction of aircraft icing phenomena. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
...
