- 왕겨의 물리적 성질
- ㆍ 저자명
- 박승제,김명호,신형명,Park. S. J.,Kim. M. H.,Shin. H. M.
- ㆍ 간행물명
- 바이오시스템공학
- ㆍ 권/호정보
- 2005년|30권 4호|pp.229-234 (6 pages)
- ㆍ 발행정보
- 한국농업기계학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Kinetic friction coefficient, bulk density, dynamic and static angle of repose, and terminal velocity of rice husk at the moisture range 7 to $23\%$ w.b. were determined. It could lead to better design and operation of the processing machinery and handling facilities. Friction coefficient was determined from the horizontal traction force measured by pulling the container holding a mass of rice husk on various plate materials. Dynamic angle of repose was calculated from the photos of bulk samples piled by gravity flow on a circular platform. Static angle of repose was determined by measuring the side angle of the bulk material which was left in a cylindrical container after natural discharge of the bulk sample through a circular hole in the bottom plate. Kinetic friction coefficients of rice husk were in the range of $0.254~0.410,;0.205~0.520,;0.229~0.400,;and 0.133~0.420$ on PVC, mild steel, galvanized steel, and stainless steel, respectively. Bulk density, dynamic and static angle of repose, and terminal velocity were in the range of $91.7~98.3$ $kg/m^3$, $40.2~47.6^{circ},;52.8~83.7^{circ},$ and $1.36~1.73$ m/s, respectively. These physical properties of rice husk increased linearly as the moisture content increased.