The characteristics of indoor hydrogen leakage and diffusion along with the spatiotemporal evolution pattern of hydrogen concentration

This study investigates the diffusion characteristics and concentration distribution of hydrogen leakage in indoor environments by combining experimental methods with numerical simulations. The research focuses on the diffusion processes near walls and corners, as well as the distribution behavior of hydrogen at different leakage flow rates. Results indicate that hydrogen concentration decreases rapidly in the vertical direction during the initial stage of leakage and exhibits a symmetrical distribution laterally. At a flow rate of 10SLPM (standard liters per minute), the maximum alarm range occurs approximately 1 meter from the leakage point. Additionally, hydrogen leakage in corners shows similar behavior to that near walls but tends to accumulate more in the upper corners. The findings from both experiments and simulations are significant for optimizing the placement of indoor hydrogen sensors and enhancing the efficiency of emergency responses to hydrogen leaks.