Three-Dimensional Temporal Evolution of Primary Liquid Breakup in SPRAYs

该建议的目的是同时量化的连续的液体核心和周围的气流在模型的空气雾化器，通常用于现代航空发动机的主要破碎区域之间的三维瞬时相互作用。喷油器在降低污染物水平以符合严格的排放标准方面起着至关重要的作用。然而，雾化过程涉及3D空间中空气和液体流动之间的随机动量耦合，这要求同时建立3D空气和液体流动数据库，以了解基础物理学和提供新的相关性，以及设计优化所需的指导方针。该项目将比以往任何时候都更好地理解近喷嘴区域液体破碎过程的基本物理学。这将通过开发一种新的激光诊断工具来实现，该工具用于在破碎过程中同时测量空气和液体流的3D（体积）。新的激光诊断将联合收割机结合：（a）液体破碎区域的全光成像，使用光学连接技术获得破碎期间的瞬时3D连续液体结构，与（B）破碎液体周围的3D空气流的多激光片立体粒子图像测速测量。这是任何其他文书都无法比拟的独特能力。首先，该项目涉及生成独特的3D（体积）数据库，该数据库允许开发和验证计算模型，这些模型从未与3D（体积）测量进行过比较。接下来，将首次通过法国ONERA提供的MERCATO试验台在实际发动机运行条件下获取3D数据。后者对建造下一代净零碳航空发动机具有直接影响，可减少NOx和颗粒物排放，以符合未来的欧盟ACARE目标（Flightpath 2050）。因此，该项目将加强欧盟在可持续、低排放流动性方面的竞争力（欧盟绿色协议）。

The purpose of the proposal is to quantify simultaneously the 3D instantaneous interaction between the continuous liquid core and the surrounding airflow at the primary breakup region of a model airblast atomizer, typically used in modern aeroengines. Fuel injector plays a vital role in cutting down pollutant levels to comply with stringent emission norms. However, the atomization process involves stochastic momentum coupling between air and liquid flows in 3D space that mandates database on simultaneous 3D air, liquid flow for the understanding of underlying physics and the delivery of novel correlations, guidelines required for design optimization. This project will understand better than anytime before the underlying physics of the liquid breakup process at the near nozzle region. This will be achieved by developing a novel laser diagnostic tool for simultaneous 3D (volumetric) measurements of the air and liquid flows during the breakup process. The novel laser diagnostic will combine: (a) plenoptic imaging of the liquid breakup region, using the optical connectivity technique to obtain instantaneous 3D continuous liquid structure during breakup, with (b) multi-laser sheet stereo Particle Image Velocimetry measurements of the 3D air flow around the breaking liquid. This is a unique capability not matched by any other instrument. First, the project involves generation of unique 3D (volumetric) database that allows the development and validation of computational models, which have never been compared to 3D (volumetric) measurements. Next, for the first time, 3D data will be acquired at realistic engine operating conditions through MERCATO test rig available at ONERA, France. The latter has a direct impact on building next-gen net-zero carbon aeroengines with reduced NOx and particulate emissions to comply with future EU ACARE goals (Flightpath 2050). Thus, the project will strengthen the EU's competitiveness in sustainable, low-emission mobility (EU Green Deal).