Conventional rotary sawing machine for cutting lumber generates severe amount of dust scattering to the environment. In this research, the design improvement of the rotary sawing machine is achieved to significantly reduce the dust scattering by the design process utilizing computational fluid dynamics (CFD) analysis. Several design candidates for the design improvement of the rotary saw system were proposed and modeled, and CFD analyses were performed to choose the best design in viewpoint of the least dust scattering. CFD analysis proved to be very useful to predict the characteristics of the air flow inside the saw system. The movement of dust particles with the air flow during the sawing process was analyzed for various design features of the saw system. The most efficient design to minimize the amount of dust particles ejected from the saw system was chosen based on the CFD analysis results. Then, the prototype of the best candidate of the improved rotary saw machine was built and the amount of dust particles were measured to verify its performance.

ABSTRACT
1. 서 론
2. CFD를 이용한 회전톱기계 설계 개선
    2.1 회전톱 목재 재단기의 기본 구조
    2.2 설계 개선 안 도출 및 CFD 모델링
    2.3 CFD 해석 방법 및 모델
    2.4 지배방정식
    2.5 난류모델
    2.6 CFD 해석 결과 (Cases 1,2,3,4)
    2.7 CFD 해석 결과 (Case 5)
3. 비산 먼지 측정 실험
4. 결 론
References

• 이희남(Dept of Aerospace Eng/Aerospace Research Center, Sunchon National Univ.) | Huinam Rhee Corresponding Author
• 전완호(Technical Lab of CEDIC Co. Ltd.) | Wan-Ho Jeon