CFD Analysis of Co Flow Jet Airfoil

Mixing Mechanism of a Discrete Co-Flow Jet Airfoil

The flow mechanism leading to the enhanced performance of a discrete co-flow jet (dCFJ) airfoil is investigated. Flow visualization and DPIV are used to analyze the difference between the flow along discrete jets and over the tabs used for discretization of the slot jet. Results show that the entrainment is uniform over the leading jet as long as the tab size is small enough. The jets expand sp...

Experimental Investigation of Jet Mixing Mechanism of Co-Flow Jet Airfoil

The jet mixing of a co-flow jet (CFJ) airfoil is investigated to understand the mechanism of lift enhancement, drag reduction, and stall margin increase. Digital Particle Image Velocimetry, flow visualization and aerodynamic forces measurements are used to reveal the insight of the CFJ airfoil mixing process. At low AoA and low momentum coefficient, the mixing between the wall jet and mainflow ...

CFD analysis of flow in an open-jet aeroacoustic experiment

When considering the sound emitted by a rotating machine such as an engine cooling fan, an airplane turbofan, or an air-conditioning unit, one major contributor to the overall noise is the blade trailing edge noise. It comes from the conversion of local flow perturbations at this geometric discontinuity into acoustic waves propagating in space. Depending on the flow Reynolds number (based on th...

Experimental Study of Co-Flow Jet Airfoil Performance Enhancement Using Discreet Jets

This paper demonstrates a new performance enhancement methodology for Co-Flow Jet (CFJ) airfoils using discrete injection jets. This research is motivated by the hypothesis that a discrete CFJ (DCFJ) airfoil will generate both streamwise and spanwise vortex structures to achieve more effective turbulent mixing than an open slot CFJ airfoil. Aerodynamic forces and DPIV measurements show that the...

Effect of Adverse Pressure Gradient on a Fluctuating Velocity over the Co-Flow Jet Airfoil