GOALI: Effect of free-stream disturbances on turbulent boundary layers

PI: Zaki， tamer提案号：1605404这是一个GOALI项目，主要研究自由湍流与湍流边界层之间基本相互作用的计算研究。该方案将采用高保真直接数值模拟和条件采样技术。工业合作者是GE，这种合作可以导致一个项目，该项目将关注与实际应用相关的流动条件。提出的工作旨在填补目前对设计低排放目标发动机的理解和实践的空白。目前，设计过程是基于从流动研究中提取的相关性，而没有考虑背景干扰。通常为了可靠性和安全性而牺牲效率。然而，背景干扰会导致无法预测的扭曲。该GOALI提案通过提供缺失的基础研究来填补这一空白，从而实现更高效、更可靠的设计，从而提高发动机性能和更清洁的运行。还有一个强有力的推广计划，将利用约翰霍普金斯大学现有的活动，包括为K-12学生举办的活动。参与该项目的研究生将受益于工业副主任的指导，并将在GE度过一段时间。

PI: Zaki, TamerProposal Number: 1605404This is a GOALI project that is focused on the computational investigation of the fundamental interactions between free turbulence and the turbulent boundary layer. The proposal will employ high fidelity direct numerical simulations and conditional sampling techniques. The industrial collaborator is at GE, and this collaboration can lead to a project that will be concerned with flow conditions that are relevant to practical applications. The proposed work aims to fill a gap in current understanding and practice of designing engines with low emission goals. Currently, the design process is based on correlations that are extracted from studies of flows without accounting for background disturbances. Often efficiency is sacrificed in favor of reliability and safety. However, background disturbances can cause distortions that are not predictable. This GOALI proposal address this gap by providing the missing fundamental research that will enable more efficient and reliable designs and, in turn, better engine performance and cleaner operation. There is also a strong outreach plan that will leverage existing activities at Johns Hopkins, including activities for K-12 students. The graduate student involved in this project will benefit from the mentoring of the industrial co-PI and will spend time at GE.