Low TRL spray measurement with mid TRL reacting correlations

现代低排放燃气轮机燃烧系统的一个关键性能参数是产生均匀和雾化良好的喷雾的能力。然而，喷雾是复杂的液滴多相流，其中的多个参数可以影响各种破碎机制。这使得在了解发动机、中压设施和定制喷雾测试设施之间哪些无因次性能参数是保守的方面尤其具有挑战性，这些设施通常用于开发现代低排放燃油喷射器。因此，喷油器的开发往往依赖于使用昂贵且耗时的高技术准备水平(TRL)设施。这项工作的一个关键目标是确定决定现代低排放喷油器产生的喷雾分布的关键过程，以及这与燃烧系统的反应流动性能之间的联系。这样做的目的是提供一种新的战略，通过这种战略，相关的物理过程可以在简化的设施中适当地调整和捕获，这些设施在更有利的条件下运行，也可以进行高质量的测量。这将使用各种实验和数据分析技术进行。通过这种方式，低TRL设施上的成本效益措施可以用于快速开发能够提供所需操作特性的低排放燃气轮机喷油器。

A key performance parameter for a modern, low emission, gas turbine combustion system is the ability to generate a uniform and well atomised spray. However, sprays are complex droplet laden multiphase flows in which multiple parameters can influence a variety of break-up mechanisms. This makes it particularly challenging in terms of being able to understand which non-dimensional performance parameters are conserved between the engine, Intermediate pressure facilities and bespoke spray test facilities that are commonly used to develop modern, low emission, fuel injectors. As a consequence, injector development often relies on the use of expensive and time-consuming high Technology Readiness Level (TRL) facilities. A key objective of this work is to identify what are the key processes that determine the spray distribution generated by modern, low emission injectors and how this links to the reacting flow performance of the combustion system. The intention is then to provide a novel strategy by which the relevant physical process can be suitably scaled and captured in simplified facilities operating at more benign conditions which are also amenable to high quality measurements. This will be undertaken using a variety of experimental and data analysis techniques. In this way cost effective measurements on low TRL facilities can be used for the rapid development of low emission gas turbine fuel injectors which are capable of providing the required operability characteristics.