TY - JOUR A2 - Merah, Othmane AU - Dimitriadis, Christos I. AU - Brighton, James L. AU - O’Dogherty, Mike J. AU - Kokkora, Maria I. AU - Darras, Anastasios I. PY - 2014 DA - 2014/10/07 TI - Physical and Aerodynamic Properties of Lavender in relation to Harvest Mechanisation SP - 276926 VL - 2014 AB - A laboratory study evaluated the physical and aerodynamic properties of lavender cultivars in relation to the design of an improved lavender harvester that allows removal of flowers from the stem using the stripping method. The identification of the flower head adhesion, stem breakage, and aerodynamic drag forces were conducted using an Instron 1122 instrument. Measurements on five lavender cultivars at harvest moisture content showed that the overall mean flower detachment force from the stem was 11.2 N, the mean stem tensile strength was 36.7 N, and the calculated mean ultimate tensile stress of the stem was 17.3 MPa. The aerodynamic measurements showed that the drag force is related with the flower surface area. Increasing the surface area of the flower head by 93% of the “Hidcote” cultivar produced an increase in drag force of between 24.8% and 50.6% for airflow rates of 24 and 65 m s^-1， 分别。品种花头的终端速度范围为4.5和5.9 m^-1，这导致平均阻力系数为0.44。拖动系数的值与适当的Reynolds数字的良好值兼容。SN - 1687-8159 UR - https://doi.org/10.1155/2014/276926 do - 10.1155/2014 / 276926 JF - 国际农艺杂志 - Hindwi Publishing Corporation KW - ER -