基于CFD不同AUV艇体阻力性能研究

为了研究不同类型AUV艇体阻力性能特点以及十字舵和整流罩附体对总阻力的影响,在充分研究4种艇型型线的基础上,建立几何模型,选取标准k-ε,RNG k-ε,SST k-ω湍流模式,通过CFD对艇体进行阻力数值模拟。结果表明,十字舵引起的艇体阻力增加比例大约在10%~20%,且随着展弦比的增加而呈减小趋势,直径与艇体最大直径相当的整流罩引起的艇体阻力增加比例大约在40%~50%;流线型BLUEFIN阻力增加值随航速变化较大,而钝性BLUEFIN阻力增加值几乎不受航速的影响,AUTOSUB型AUV阻力性能最优,AUTOSUB和HUGIN适合中高速航行,REMUS和BLUEFIN适合低速航行。

Research on Resistance Performance of Different AUV Types Based on CFD

In order to study resistance performance of different AUV types and impact of appendage such as cross rudder and cowling on it, based on particular research on hull lines of four AUV types , numerical simulations of resistance performance were conducted selecting turbulence models of standard K-, RNG k-, SST k-.Numerical results of increase proportion of total resist-ance caused by cross rudder and cowling showed that the former causes 10%~20%increase and rises with aspect ratio reducing and the latter causes 40%~50%of which the diameter is almost equals to the max hull diameter .Unit displacement resistance of BLUEFIN type with streamlined head increases by navigation speed , of which with upright head the unit displacement resist-ance is nearly the same .Resistance performance of AUTOSUB type is best .AUTOSUB and HUGIN type are suitable for high speed navigation while REMUS and BLUEFIN types are appropriate for low speed cruise .