Abstract: In order to ensure the density of smoke in the bulk curing barn and reduce the energy consumption of baking, a variable volume system suitable for the bulk curing barn was developed. After the design of the variable volume device was completed, the influence of different distances between the device and tobacco leaves on the uniformity of gas distribution inside the bulk cuing barn was simulated and analyzed based on the CFD method. The actual roasting data was obtained through the roasting test, and the simulated values were verified. The test results showed that when the distance between the separator and the tobacco leaf was 0 cm, the nonuniform coefficient of flow velocity Kv was 0.40, the nonuniform coefficient of temperature Kt was 0.41, Kv=0.41, Kt=0.43 when the distanc was 10cm, Kv=0.42, Kt=0.49 when the distanc was 20cm. The simulated temperature values of 9 measurement points in the cigarette loading area were basically consistent with the measured values, with an error of within 6%. When the capacity of the variable volume curing barn was half, the fuel consumption can be saved by 13.4% compared to the conventional curing room. The research results indicated that when the distance between the partition and the tobacco leaves was 0cm, the gas distribution inside the curing room was the most uniform. The CFD model and numerical simulation results had a certain degree of reliability. The variable volume device has good insulation effects, which can ensure the density of tobacco loading and reduce energy consumption of fluecured tobacco.

Key words: bulk curing barn, variable volume, CFD method, numerical simulation

摘要： 为保障密集烤房装烟密度，降低烘烤的能源消耗，研发一套适用于密集烤房的变容积系统。在完成变容积装置的设计后，基于CFD方法模拟分析装置与烟叶的不同距离对烤房内部气体分布均匀性的影响。通过烘烤试验获取实际烘烤数据，对模拟值加以验证。试验结果表明：当隔板与烟叶距离为0cm时，流速不均匀系数Kv为0.40，温度不均匀系数Kt为0.41，距离为10cm时，Kv=0.41，Kt=0.43；距离为20cm时，Kv=0.42，Kt=0.49。装烟区9个测量点的温度模拟值与实测值基本吻合，误差在6%以内。变容积烤房在装烟量为一半时，相比常规烤房的燃料消耗可节约13.4%。研究结果表明：当隔板与烟叶距离为0cm时烤房内部的气体分布最均匀；CFD模型与数值模拟结果具有可靠性；变容积装置具有较好的保温效果，可保证装烟密度，降低烤烟能耗。

关键词: 密集烤房, 变容积, CFD方法, 数值模拟