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축류(軸流) 콤바인의 개발(開發)에 관(關)한 기초(基礎) 연구(硏究)(II) - 탈립과정(?粒過程)의 수학적(數學的) 모형(模型) 개발(開發) -
이승규,우종구,김성태,Lee, S.K.,Woo, J.K,Kim, S.T. 한국농업기계학회 1991 바이오시스템공학 Vol.16 No.1
This study was carried out getting basic data for developing a new combine which is suitable for the cultivating situation in Korea or Southeast Asia. The relation of the amount of unthreshed grains and the axial displacement of crop in threshing process was attempted to formulate mathematically in a threshing chamber of axial-flow threshing unit. It was found that unthreshed grain is an exponetially-decaying functon of axial displacement of grains based on available data. Threshing experiments were performed to validate the mathematical model by changing various levels of pertinent variables for malting barley. Good correlation were obtained between the theoretical calculation and observed data for various test conditions, such as inclination, vane pitch, concave length, drum speed, feeding velocity, stream weight, moisture content. Therefore the model can be used for general purpose to find the amount of unthreshed grain if the mean rate of occurence of threshing of kernels(${\lambda}_{\tau}$) is properly calibrated considering some other operating conditions and crop conditions which are not involved in this analysis.