冷库门空气幕性能的影响因素

以一个实际运行的冷库为研究对象，建立了包含冷藏间内部对流、冷库门空气幕射流及室外环境风场流动在内的三维整体耦合求解数值模型。在冷库门和空气幕同时开启的条件下，研究了冷库门空气幕喷口宽度、出口射流速度和喷射角度等参数对空气幕性能和效率的影响规律。结果表明，对于某个具体的冷库，存在最优的空气幕出口射流速度和最优的喷射角度，使得冷库门空气幕的性能最优，效率最大。空气幕的出口喷射宽度也不是越宽越好。

Impact factors of air curtain performance in cold store

A coupled global model of fluid flow and heat transfer was developed for a cold store in use. The convective heat transfer in the springhouse, the jet flow of the air curtain installed at the entrance and the environmental flow outside the cold store were solved together in a coupled way. The effects of the outlet width, the jet velocity and the jet angle of the air curtain on its performance and efficiency were numerically studied respectively under the condition that the air curtain and store gate opened simultaneously. The results showed that there existed an optimal value for the jet velocity and the jet angle at which the air curtain had the best performance and the highest efficiency. A large outlet width does not necessitate for better performance of an air curtain if it exceeds the critical value.