喷水推进系统在浅水高速工况下适应性问题的数值分析  

Numerical analysis of a waterjet propulsion systerm's adaptability on the condition of shallow water

作　　者：苑龙飞 罗凯[1] 蒋彬[1] 王致强 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《水动力学研究与进展（A辑）》2016年第2期225-231,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科技基金(51409215);陕西省自然科学基金(2014JQ7263)~~

摘　　要：针对单级喷水推进系统在浅水高速工况下适应性差的问题,提出了双级对转泵喷水推进方式。采用高质量结构化网格对数值模拟系统的各部件进行区域离散,利用不可压缩RANS方程模拟出喷水推进装置内复杂的流动情况。设计条件下的计算结果与理论推导结果的吻合性证实了数值方法的合理性。比较设计工况下的流量、喷水泵叶片的空化范围,得出了在输入功率相同的情况下,相比较单级喷水推进系统,双级喷水推进方式可以提高浅水作业能力的结论,并进一步探索最小航行深度。On account of single stage propulsion pump＇s bad resistance to cavitation in shallow water working condition, a new waterjet propulsion system, consisted of contra-rotating turbine and double stage propulsion pump, is proposed. Its flow field in the given situation is analyzed with the method of computational fluid dynamics（CFD）. Each part of the numerical model is meshed by high quality hexahedral mesh. Over the agreement between the numerical simulations and theoretical results, the validity of the adopted RANS equations turbulence model is proved. The flow rate and the extent of cavitation on the pump blades at the design points are compared and the results show that with the same input power the double stage propulsion system can work better than the single stage propulsion system under a shallow condition. Last, the minimum running depth is studied.

关 键 词：喷水推进 RANS方程组 双级轴流泵 浅水工况 

分 类 号：TK05[动力工程及工程热物理]