进水口面积对喷水推进进水流道流动性能影响

发布时间：2019-06-01 09:16

【摘要】：以某平进水口进水流道为研究对象,通过改变进口的长度和进口处流道背部的曲线形状建立了4种不同进水口面积的流道模型.通过计算不同进速比(IVR)得到流道内流场的流动特性,分别从流道出口速度加权平均角,壁面空化情况、流道过流损失分析不同进水口面积对进水流道流动性能的影响.计算结果表明:进水口面积的增加和流道背部斜面曲线形状的改变,提高了流道出口截面的出流质量,主要表现在IVR在1以下时流道出流加权平均角增加1°~2°,进水流道上壁面压力系数在IVR=1时轴附近增加0.05~0.1,上壁面与船体相切处增加0.73~0.17,下壁面压力系数增加主要表现在IVR较小的情况增加0.1~0.25.流道过流损失ξ增加0.047~0.007表明流道过流损失减小.进水口面积的增加对唇角处水流冲击产生的压力峰值影响较小.
[Abstract]:Taking the inlet channel of a flat inlet as the research object, four kinds of channel models with different inlet areas are established by changing the length of the inlet and the curve shape of the back of the inlet channel. The flow characteristics of the flow field in the flow channel are obtained by calculating the flow rate ratio (IVR). The weighted average angle of velocity at the outlet of the channel, the wall cavitation and the flow loss of the channel are analyzed to analyze the influence of different inlet area on the flow performance of the inlet channel. The calculation results show that the increase of inlet area and the change of the curve shape of the back oblique plane of the channel improve the outflow quality of the outlet section of the channel, which is mainly manifested in the increase of the weighted average angle of the flow channel by 1 掳~ 2 掳when the IVR is below 1. The pressure coefficient on the upper wall of the inlet channel increases by 0.05 鈮，

本文编号：2490161