Synchronous In-Situ Characterization of Multi-Physics Fields and Non-Equilibrium Coupling Mechanism in Turbulent multiphase Pulverized Coal Combustion

Turbulent multiphase reactive flows and non-equilibrium multi-field coupling represent a long-standing core frontier scientific challenge in the field of applied physics. The core bottleneck restricting the clean and efficient utilization of pulverized coal essentially stems from the incomplete understanding of the nonlinear coupling laws among momentum transport (velocity field), mass transport (species concentration field), and energy transport (temperature field) during the combustion process. Most existing studies focus on the independent measurement of individual field quantities, which cannot reconstruct the authentic physical scenario of the combustion process, and there is a persistent lack of benchmark experimental datasets from multi-field synchronous measurements under realistic combustion conditions. In this research, a state-of-the-art non-contact laser-based multi-parameter synchronous measurement system is employed to perform synchronous in-situ measurements with high spatiotemporal resolution for the gas-solid two-phase velocity field, gas-phase species concentration field, and gas-phase temperature field during swirling pulverized coal combustion. The spatiotemporal evolution characteristics of these physical fields, and quantitatively revealed the strong bidirectional flow-reaction coupling mechanism dominated by the central recirculation zone are systematically characterized. The findings fill the critical experimental gap in the field of multi-field synchronous measurement for pulverized coal combustion, provide benchmark experimental data for the development and validation of theoretical models for turbulent multiphase reactive flows, and offer a theoretical basis for applied physics research on complex non-equilibrium multi-field coupling systems.