喷水推进操舵倒航机构内表面的压力分布研究

Research of internal surface pressure distribution of the steering and reversing gear of waterjet unit

操舵倒航机构是完成喷水推进船舶操纵功能的部件。随着喷水推进装置的大型化发展,机构重量也越来越重,为了将整个装置的重量限制在可接受范围内,同时提高操舵倒航机构的精细化设计水平,研究作用在机构内壁面上的压力分布,为机构的刚强度计算提供输入。采用数值模拟和模型试验相结合的方法对作用在机构表面的压力进行计算及测量,数值模拟基于RANS方程求解,采用非结构网格和标准k-ε湍流模型,模型试验在立式循环水槽中进行。最后结果显示数值计算结果和模型试验结果具有较好的一致性。

A waterjet steering and reversing gear(SRG)is used to effect steering and reversing of a waterjet-propelled vessel.With the development of very large waterjet units,the weight of waterjet units arises.In order to keep overall weight levels within acceptable limits and raise the detailed design level for the SRG.Adetailed pressure distribution research is launched to provide accurate result for adequate strength and stiffness analyze.Computational fluid dynamics(CFD)and extensive experimental validation studies have been undertaken to measure the pressure.The numerical simulation was based on RANS equation,using unstructured mesh and standard k-εturbulence model,and the model test was carried out in a vertical circulating flume.The final results show that the numerial results are in good agreement with the model test results.