贻贝高压水射流清洗喷嘴流场仿真

Flow field simulation and experiment of mussel high pressure water jet cleaning nozzle

目的:解决贻贝传统清洗方式存在的耗水量大、清洗效果差的问题。方法:通过Solidworks软件建立不同结构参数的轴向扇形喷嘴几何模型,分别在Fluent软件中设置参数后,对射流内外流场的速度和含水率进行数值计算。结果:喷嘴的喷射角越大,射流外流场流速的衰减速度越快,含水率越低;喷嘴的等效直径越大,射流外流场流速的衰减速度越慢,含水率越高;射流靶距过大或过小,均会影响外射流在XY平面的流速均匀性。结论:喷射角为65°,等效直径为2 mm的轴向扇形喷嘴,在射流压力为11 MPa、靶距为90 mm时,更适合贻贝外壳的射流清洗。

Objective: It solves the problems of large water consumption and poor cleaning effect existing in the traditional cleaning method of mussels. Methods: The geometric models of Axial fan-nozzle with different structural parameters were established by Solidworks software. After setting the parameters in fluent software, the velocity and water content of the internal and external flow fields of the jet were numerically calculated. Results: The larger the spray angle of the nozzle was, the faster the decay velocity of the flow field of the jet was, and the lower the water content was. The larger the equivalent diameter of the nozzle was, the slower the velocity decay of the jet flow field and the higher the water content was. If the jet target distance was too large or too small, the velocity uniformity of the outer jet in the XY plane would be affected. Conclusion: The axial fan-shaped nozzle with a jet angle of 65° and an equivalent diameter of 2 mm is more suitable for jet cleaning of mussel shells when the jet pressure is 11 MPa and the target distance is 90 mm.