CAREER: Application-Driven Combustion and Fluid Flow Imaging

职业生涯：应用驱动的燃烧和流体流动成像，CTS-0348208 Lester K.苏，约翰霍普金斯大学机械工程系摘要这项工作包括平面激光成像技术的发展和应用，用于研究燃烧和湍流流动问题。它特别注意分子混合，着眼于严格的实验评估模型中使用的模拟非预混，湍流燃烧。平面成像方法能够直接可视化湍流结构，因此本质上非常适合于评估在概念上植根于湍流结构组织的模拟方法（如大涡模拟）。 这项工作包括开发一种基于标量场测量的气相湍流测速技术，该技术可应用于混合和燃烧模型的先验测试，并利用瑞利散射和平面激光诱导荧光方法研究了多分子体系中的微分分子扩散，该研究计划的结果将有助于提高效率和减少燃烧系统的环境影响，通过提高对基础的理解，湍流混合过程，并促进更准确的模拟方法的发展。在可预见的未来，化石燃料的燃烧对工业经济仍将具有重要意义，高效和清洁的燃烧对可持续发展至关重要。在这项工作的过程中，PI还解决了大学工程系入学率停滞不前的问题。正在开发新的课程，使工程教育反映工程实践的当前趋势，工程多样性问题的解决方式，承认不同的代表性不足的群体所面临的不同障碍。

CAREER: Application-driven Combustion and Fluid Flow Imaging, CTS-0348208Lester K. Su, Department of Mechanical Engineering, Johns Hopkins UniversityAbstractThis work encompasses the development and application of planar laser imaging techniques for investigating problems in combustion and turbulent fluid flows. It pays particular attention to molecular mixing, with an eye to rigorous experimental assessment of models used in simulations of non-premixed, turbulent combustion. Planar imaging methods are capable of direct visualization of turbulent flow structures and are thus inherently well suited for assessing simulation methods (such as large-eddy simulation) that are rooted conceptually in the structural organization of turbulent flows. This work includes the development of a velocimetry technique for gas-phase turbulent flows that is based on scalar field measurements, which can be applied in a priori testing of mixing and combustion models, and the use of Rayleigh scattering and planar laser-induced fluorescence methods to investigate differential molecular diffusion in multi-species turbulent mixing problems.The results of this research program will contribute to increased efficiency and reduced environmental impact of combustion systems by improving the understanding of the underlying turbulent mixing process and facilitating the development of more accurate simulation methods. Combustion of fossil fuels will remain significant to the industrial economy for the foreseeable future, and efficient and clean combustion is crucial for sustainable development. In the course of this work, the PI also addresses the issue of stagnant enrollments in university engineering departments. New courses are being developed to make engineering education reflect current trends in engineering practice, and the issue of diversity in engineering is addressed in a way that recognizes the different obstacles faced by different under-represented groups.