Recent research led by Xinling Lu from the School of Civil Engineering at Chongqing University has shed light on an innovative solution for enhancing safety in bifurcated tunnel fires. Published in the journal ‘Case Studies in Thermal Engineering’, this study explores the effectiveness of smoke prevention air curtains in controlling smoke spread during emergencies. The findings could have significant implications for construction practices and safety measures in tunnel design.
The study employed 1:10 scale model experiments to analyze how factors such as jet velocity and heat release rate (HRR) affect the smoke sealing effectiveness of air curtains. “Our research indicates that while the jet velocity plays a crucial role, its impact becomes less pronounced once it surpasses a certain threshold,” Lu explains. This insight is particularly vital for engineers and architects tasked with designing evacuation routes in complex tunnel systems.
Further numerical simulations complemented the experimental data, revealing that smoke sealing efficiency is positively correlated with jet velocity but negatively affected by HRR and longitudinal velocity. Interestingly, the research also found that increasing the bifurcation angle could enhance smoke sealing efficiency. “These findings not only contribute to theoretical knowledge but also provide practical guidelines for designing effective smoke control measures,” Lu noted.
The implications of this research extend beyond academic interest; they present tangible benefits for the construction sector. With the increasing prevalence of underground transportation systems, the need for effective smoke management strategies has never been more critical. By implementing air curtain technology, construction firms can create safer environments for both workers and commuters, potentially reducing liability and improving public trust.
Moreover, the study proposes a prediction model for determining optimal air curtain jet velocities tailored to specific tunnel designs. This model, developed through dimensional analysis, could serve as a blueprint for engineers aiming to enhance safety protocols in tunnel construction. As Lu stated, “This model can guide future designs and ensure that safety measures keep pace with evolving infrastructure demands.”
As the construction industry continues to innovate, research like Lu’s plays a pivotal role in shaping safer, more efficient designs. The insights gained from this study not only promise to improve emergency response strategies but also highlight the importance of integrating advanced technologies into construction practices. For more information about Xinling Lu’s work, visit lead_author_affiliation.
