The PhD research studies the turbulent non-premixed jet flames under the imposed co-flow fields with varying turbulence intensity, with the comparations under the normal gravity and microgravity.

Microgravity experiments suppress buoyancy-driven turbulence, enabling clearer identification of turbulence effects and flame-turbulence interactions.

This work introduces the imposed co-flow fields using the perforated plates with varying blockage ratios. Turbulence levels are controlled by adjusting jet velocity, co-flow velocity, and the blockage ratio of the perforated plate. Schlieren imaging and planar PIV are used to visualize the flow and quantify velocity and turbulence intensity fields in cold and reacting conditions. Flame height, liftoff height, blowoff limits, temperature distribution, radiation, and soot distributions are measured using imaging, thermocouples, radiometers, and LII diagnostics. The results support improved correlations for flame height and liftoff height under both normal gravity and microgravity across different turbulence levels.

In addition to the experiments, this project will conduct numerical simulations to further investigate the interaction between flame and turbulence. The simulations will be used to systematically vary flow field turbulence parameters and quantify their effects on lifted flame stabilization, including flame height and liftoff height.

The experimental and modelling results will be combined to modify liftoff height model and improve predictive capability across gravity levels and turbulence intensities.