Akademik Veri Yönetim Sistemi
SEPARATION SCIENCE AND TECHNOLOGY, 2026 (SCI-Expanded, Scopus)
Cyclone separators are widely used in industry, where separation efficiency and pressure drop define cyclone performance. A common strategy for increasing cyclone efficiency is to use smaller cyclones. However, does reducing the cyclone size while maintaining geometric similarity continuously increase efficiency, or is there a limit to this approach? In this study, geometrically similar high efficiency Stairmand cyclones with body diameters of 10, 15, 20, 25, and 30 mm were investigated experimentally and theoretically at inlet velocities of 4-10 m/s using calcite particles at constant dust concentration. The highest separation efficiency (0.915) was obtained in the 30 mm cyclone at 10 m/s. The 25 and 20 mm cyclones showed similar efficiencies, whereas the 15 and 10 mm cyclones showed considerably lower efficiencies, decreasing to 0.14 in the 10 mm cyclone. Pressure loss coefficients decreased with cyclone size, with measured Euler numbers ranging from 3.4-4.4 (30 mm) to 1.0-2.0 (10 mm). Theoretical predictions were consistent with experimental trends, although deviations increased for smaller diameters due to relative roughness and transitional flow effects. The results indicate that for geometrically similar cyclones under constant inlet velocity, separation efficiency reaches a maximum at a certain cyclone diameter, beyond which further size reduction reduces efficiency.