Fundamental Physics and Practical Applications of Electromagnetic Local Flow Control in High Speed Flows

摘要

The report summarizes two major achievements in Electromagnetic Local Flow Control (ELFC) in high speed flows. The first achievement is the demonstration of the effective and efficient reduction of pressure drag on a blunt cylinder in supersonic flow using pulsed heated filaments. Numerical simulations indicate drag reduction up to 30% with power requirements typically 1% of the power saved through drag reduction. No adverse effect on heat transfer to the blunt cylinder is observed. Indeed, a 30% reduction in heat transfer is observed for one configuration. The second achievement is the development and application of a fully 3-D, time-accurate, viscous gas dynamic code for simulation of microwave energy discharge in air (including full thermochemistry) and the interaction of the microwave-generated plasma with a blunt body in supersonic flow. Comparison of computed and experimental surface pressure show good agreement.