摘要
为改进水下部分进气冲动式涡轮机斜喷管的设计,考虑实际过程中喷管内部的流动损失及出口气流的偏角、涡轮动叶栅的压降损失和余速损失,提出了一种斜喷管的设计新方法,并用数值方法进行了合理性检验。较传统方法而言,采用新方法设计出的斜喷管对应的涡轮内效率提高了5%左右,且涡轮机出口静压更接近设计背压。该方法可为水下涡轮机斜喷管设计提供参考。
Considering the inner flow loss of nozzles, the deflection of the outlet flow, the pressure loss and leaving- velocity loss of turbine cascades, a new design approach of the scarfed nozzle is presented for an underwater partial air inlet impulse turbine to modify the conventional design approach. The feasibility of the present approach is verified by numerical simulations. Compared with the conventional design approach, the inner efficiency of the modified turbine is raised by about 5%, and the outlet static pressure is closer to the designed back pressure. The present design approach may provide a reference for the design of turbine＇s scarfed nozzles.
出处
《鱼雷技术》
2015年第4期296-300,共5页
Torpedo Technology
基金
国家自然科学基金项目资助(51409215)
中央高校基本科研项目资助(G2015KY0102)
关键词
冲动式涡轮机
斜喷管
设计方法
内效率
impulse turbine
scarfed nozzle
design approach
inner efficiency
