신 개념 Dry Separator 내 미분 분리의 원리 및 전산수치해석에 의한 유동해석

다국어 초록 (Multilingual Abstract)

Fine aggregates of mineral products, waste concrete, and waste in the general industry can be segregated according to aggregate size by using separators, i.e. sorting machines. The various types of separators used in the industrial field can be categorized based on the principle of operation such as centrifugal force, wind power, vibration and magnetic force. In this study, we consider a dry separator of new concept which consists of a rotor with three stages of rotating blades. The air flow and particle tracking is analysed numerically to understand the behavior of waste concrete particles as they pass through the rotor blades. Intention of this work is to investigate the fundamental mechanism of particle separation from the developed separator and investigate its performance.
We consider both 2D and 3D models with 360, 240 and 180 blades in each stage of the rotor. Due to the axi-symmetry, only 6 degree sector of the entire domain is considered as the computational domain. The models are tested for various particle size, the rotor speed and the air flow rate. We found that the rotor plays a significant role in the particle separation. In particular, both the upstream and downstream ends of the rotor blades cause the particles to be stagnant there via balance between the air drag and centrifugal forces. We also present the critical size of particles that can be separated with the existing design of the separator.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 2차원 모델에 대한 수치 해석 방법
• 3. 3차원 모델에 대한 수치 해석
• 4. 전산 수치 해석 결과
• 4. 결론
• 참고문헌