Ph.D. Proposal Presentation by Shuo Li
Friday, January 31, 2003

(Dr. Marc K. Smith, advisor)

"Numerical Study of the Micro Synthetic Jet and Its Applications in Thermal Management"

Abstract

Synthetic jets as a new type of jet with zero mass flow rate have attracted many attentions to the potential applications in engineering, such as active flow structure control and thermal environment management. In depth understanding of the synthetic micro jet behavior is crucial to improve and accelerate the design and optimize process of the synthetic micro jet applications. In this study, single-phase air micro synthetic jets will be investigated numerically. The author tries to propose models of synthetic jet to reduce the simulation work related to the cavity which is not desirable by most engineering applications. The numerical models will be based on the knowledge of the flow details inside the actuator cavity through simulations and numerical experiments. The influent of the cavity geometry, orifice or nozzle geometry and the operation parameters will be integrated into this model. This model will function as a boundary condition for the simulation of the synthetic jet application system. Parameter studies on the frequency and amplitude will be conducted to find the optimal operation parameter.

A jet impingement heat transfer study will be performed to understand the mechanism of the flow and heat transfer nature with micro synthetic jet. At last, 3D investigation of an active cooling fin(s) cell will also be conducted in a numerical way.

Base on the proposed work above, the understanding of the micro synthetic jet evolution and its applications in thermal environment management will be improved. Some optimized parameters can be applied in the engineering development.

Commercial CFD codes Fluent and CFDACE+ will be employed as the simulation tools. LES and modified k-? model will be used to simulate the turbulent flow.