涡喷发动机AgI催化剂播撒技术研究

Research on Seeding AgI Agent Technologies Using Turbojet Engines

摘要:

为了提高催化作业飞机的碘化银播撒能力，本文提出了利用涡喷发动机尾焰高温、高速特性，实现AgI催化剂高效燃烧与播撒的方法。基于理论与仿真分析，设计了集存储、输送、燃烧与控制于一体的系统架构，并研制了原型机；针对性开发了AgI含量为40%的专用催化剂配方，以适应尾焰燃烧环境；通过地面试验，系统测试了催化剂在尾焰环境中的稳定燃烧特性、雾化颗粒的粒径分布及其在云室中的成冰核能力。试验结果表明，该技术能生成亚微米级（小于0.5 μm）人工冰核，其冰核含量与成冰效率均达到要求，并与普通焰条的效果相当。本技术显著提升了作业飞机的有效载荷与播撒效率，可为无人机人工影响天气作业提供新的技术途径。

Abstract:

To enhance the silver iodide (AgI) seeding capability of the catalytic operation aircraft, this paper proposes a method that utilises the high-temperature, high-speed exhaust flame of a turbojet engine for efficient AgI seeding agent combustion and seeding. Based on theoretical and simulation analysis, a systemic architecture integrating storage, delivery, combustion, and control is designed, and a prototype is developed. A specialised seeding agent formulation with 40% AgI content is developed to adapt to the exhaust flame environment. Ground tests are conducted to evaluate the seeding agent’s stable combustion within the exhaust flame, the particle size distribution of the generated aerosols, and their ice-nucleating ability in a cloud chamber. The results show that this technology generates sub-micron-sized (less than 0.5 μm) artificial ice nuclei. Both the ice nucleus concentration and the ice formation efficiency meet operational requirements and are comparable to the performance of conventional AgI flares. This technology significantly improves effective payload and seeding efficiency, offering a new technical approach for UAV (unmanned aerial vehicle)-based weather modification operations.