An Experimental and Numerical Analysis of Different Special-Shaped Cavity Cigarette Filter Rods for Typical Smoke Stream Adsorption

Cigarette filter rods, as an essential component of cigarettes, effectively filter and trap harmful substances in the smoke. With the continuous application of advanced manufacturing technologies in filter rod production, various forms of filter rods have been developed. Inhere, understanding the adsorption of the smoke stream on filter rods is beneficial for reducing the toxic effect of smoking on human health and controlling the design of filter rods. Different filter rods with special-shape cavities are chosen to investigate the influence of hollow structure on the interception efficiency of cigarettes through the DRIFTS technique. The results showed that the interception efficiency of the C-shaped filter rod for most typical flue gas is comparable to that of normal filter rod, and much higher than that of the Square-shaped cavity filter rod. Combined with the Computational Fluid Dynamics flow field simulation results, it can be seen that the gas flow in the C-shaped area exhibits a swirling effect from the small to the large end of the C-shaped cross-section in the hollow area, providing theoretical basis and experimental support for the development of efficient filter materials, which will help to improve the safety of tobacco products and reduce the harm of smoking to human health.