US-Jordan Cooperative Research: Unsteady DNS Modeling of Weakly Ionized Phased Plasma Actuators

0323216 Corke描述：该奖项支持印第安纳州圣母院圣母大学航空航天和机械工程系Thomas Corke博士和约旦伊尔比德约旦科技大学机械工程系Osamah Haddad博士之间的合作研究项目。他们计划开发一种依赖时间的DNS代码来模拟弱电离相控等离子体激励器，以此作为改进其设计并扩大其在高速应用中流体动力学控制的潜力的一种手段。这项工作建立在巴黎圣母院用于流量控制应用的弱电离等离子体激励器的广泛实验开发和数值模拟的基础上。这项工作将扩展最近开发的稳定、不可压缩的DNS代码，以开发与时间相关的模拟，该模拟将检查流体对脉冲执行器输入的瞬时响应以及相移输入对执行器阵列的影响。模拟的结果将与圣母大学的同伴实验结果进行比较。其目的是进一步优化执行器的设计，并确定其在非稳定运行时的性能极限。范围：本研究目前的应用包括与直升机后退叶片失速相关的前缘分离控制；涡轮喷气发动机低压涡轮级涡轮叶片的后缘分离控制；机翼主动增升；高马赫数下的边界层不稳定性控制；以及大后掠翼三维边界层的湍流转折控制。该项目的结果将被用于优化执行器设计和确定执行器性能的极限，特别关注非定常流动的幅度和相位响应。一名美国研究生将参加巴黎圣母大学的这一国际研究项目。

0323216 CorkeDescription: This award supports a cooperative research project between Dr. Thomas Corke, Department of Aerospace and Mechanical Engineering at Notre Dame University, Notre-Dame, Indiana and Dr. Osamah Haddad, Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid, Jordan. They plan to develop a time-dependent DNS code to model weakly ionized phased plasma actuators as a means of enhancing their design and extending their potential for fluid dynamic control in high-speed applications. This work builds on extensive experimental development and numerical modeling of weakly ionized plasma actuators for flow control applications at Notre Dame. The work will extend a recently developed steady, incompressible, DNS code to develop a time-dependent simulation that would examine the transient response of the flow to impulsive actuator inputs as well as the effect of phase-shifted inputs to arrays of actuators. The results of the simulations will be compared to those of companion experiments at the University of Notre Dame. The objective is to further optimize actuator designs and to determine limits on their performance in unsteady operation. Scope: The present applications of this research include leading-edge separation control related to helicopter retreating-blade stall; trailing-edge separation control on turbine blades in the low-pressure turbine stage of turbo-jet engines; active lift enhancement on wings; control of boundary layer instabilities at high Mach numbers; and turbulence-transition control in 3-D boundary layers on highly swept wings. The results of the project will be used to optimize actuator designs and determine limits on the actuator performance, with a special interest on the unsteady flow amplitude and phase response. A U.S. graduate student will participate in this international research project at Notre Dame University.