Case Number 102076 - Controlled Mixing and Penetration in a Swirling Jet Injector
Contact: Geoffrey Pinski
Description: Swirl is used in combustion systems to enhance mixing and provide flame stabilization in both subsonic and supersonic flows. In high-speed flow, compressibility effects reduce amplification rates of the span wise vortices and increase 3 dimensional instabilities, thereby producing preferential stream wise vortices. These vortices are less effective in entraining ambient flow into the mixing layers; therefore energy extraction from the mean flow is reduced and less energy is being transferred to small-scale vortical structures through vortex stretching. As a result, the turbulent energy is reduced universally.
The technology developed at University of Cincinnati is a novel fuel ejection technique, which will increase the initial penetration of the swirling fuel jet and increase mixing.
- Efficient combustion and other mixing applications require a combination of high penetration that requires concentrated momentum and intense mixing that necessitates distributed momentum. These are contradictory requirements. The swirl-controlled jet enables this performance with high penetration and precisely controlled mixing.
- It will result in increased efficiency of combustion system and other chemical reactions.
- The actuator is simple, cost effective, and requires low power.
- VBD is versatile and can be used for a variety of flow control applications.