Gas turbine engines for fixed-wing or rotary-wing aircraft are operated in a variety of harsh weather environments ranging from arctic, volcanic zones, to desert conditions. Operation under these degraded conditions leads to the undesired entrainment of complex particulates resulting in drastic performance losses. Hence, there is a critical need to understand the governing mechanisms to inform the development of durable thermal and environmental barrier coatings. The objective of the current work is to present a novel multiscale physics-based approach to study two-phase flows that take into account the underpinning particle transport and deposition dynamics. Sessile droplet models are presented and used to compute the contact angle at high temperatures and compared with experiments. The study also investigates the sensitivity of deposition patterns to the Stokes number and the results identify local vulnerability regions. The analysis suggests that particle size distributions and the initial trajectories of the particles are critically important in predicting the final deposition pattern.

用于固定翼或旋转翼飞机的燃气涡轮发动机在从北极，火山地区到沙漠条件的各种恶劣天气环境中运行。在这些退化的条件下运行会导致不希望的夹带复杂颗粒，从而导致严重的性能损失。因此，迫切需要了解控制机制，以告知开发耐用的隔热和环保涂层。当前工作的目的是提出一种新颖的基于多尺度物理的方法来研究两相流，其中考虑了基础粒子传输和沉积动力学。提出了无液滴模型，并将其用于计算高温下的接触角，并与实验进行了比较。该研究还调查了沉积模式对斯托克斯数的敏感性，结果确定了局部脆弱区域。分析表明，颗粒尺寸分布和颗粒的初始轨迹对于预测最终的沉积模式至关重要。