Exploring Mechanisms of Fluidic Thrust Vectoring Using a Transverse Jet and Suction

摘要

Fluidic flow control methods, such as transverse injection or suction, have been shown to be effective for thrust vector angle control of the flow issuing from a rectangular channel. The Reynolds number based on the channel height was 39,000. The objective of the current work was to explore the operating mechanism of these independent fluidic approaches and to consider the performance when they are combined in a single configuration. Suction vectors the flow via static pressure control near the jet exit, where the pressure boundary condition extends into the channel to produce finite vectoring at the exit of the jet. Transverse injection within the channel produces a recirculation zone that contributes to the vectoring effect due to the alteration of the wall static pressure distribution. The influence of suction on the vectoring performance is dependent on the level of transverse injection, with a degraded suction effect at higher transverse injection rates. Suction is effective when it is able to disturb and enhance the mixing of the jet shear layer.