Uniform air supply, Air distribution, Flow characteristic, Discharge angle, Structural optimization
Single-point heat source, Thermal plume, Centerline velocity, Centerline excess temperature
222Rn, Diffusion-decay model, indoor air quality, risk assessment, analytical solution
Air curtain, tunnel fire, Response surface method (RSM), Smoke insulation, Optimal performance
Underground tunnel, Surface roughness, convective heat transfer, Field test, Experimental validation