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

目标：自由流扰动对湍流边界层的影响

• 批准号: 1605404
• 负责人: Tamer Zaki
• 金额: $ 27.78万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1605404&HistoricalAwards=false
• 关键词: GOALI; Effect; free; stream; disturbances

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.

PI：Zaki，Tamer 提案编号：1605404这是一个 GOALI 项目，专注于自由湍流和湍流边界层之间基本相互作用的计算研究。该提案将采用高保真度直接数值模拟和条件采样技术。工业合作者在 GE，这种合作可以产生一个涉及与实际应用相关的流动条件的项目。拟议的工作旨在填补当前设计低排放目标发动机的理解和实践中的空白。目前，设计过程基于从流动研究中提取的相关性，而不考虑背景干扰。通常为了可靠性和安全性而牺牲效率。然而，背景干扰可能会导致不可预测的失真。 该 GOALI 提案通过提供缺失的基础研究来解决这一差距，这些研究将实现更高效、更可靠的设计，进而实现更好的发动机性能和更清洁的操作。还有一个强有力的外展计划，将利用约翰霍普金斯大学的现有活动，包括针对 K-12 学生的活动。参与该项目的研究生将受益于工业联合 PI 的指导，并将在 GE 工作。