摘要
带空泡航行体的附加质量是个国际上还没有解决的问题。为了预测细长体在带空泡航行时的水下轨迹，工程上必须解决空泡对附加质量λ22的影响这一实际工程问题。为此，本文针对三种不同模型进行了带空泡航行时的附加质量的试验研究。试验是用振动水翼机构在中国船舶科学研究中心03A空泡水筒上实现的，采用与平面运动机构相类似的数据处理方法分离出模型作横荡运动时的附加质显和位置导数。变化水筒中的水速或空泡数，可得到附加质量和位置导数随水速或空泡数的变化关系。试验结果表明：钝尾型物体的λ22在有水速无空泡状态下比在无水速状态下有明显的降低，而流线型较好的物体则差别不明显。空泡（肩空泡或尾空泡）的存在导致λ22的明显降低，在本次试验的空泡数范围内，λ22随空泡数的降低基本呈降低的趋势。本文的结果首次揭示了轴对称体轴向空泡的存在对横向附加质量的影响，同时试验结果也向人们提出了如何解释空泡的存在会减小λ22这一理论问题，因此具有较大的学术意义。
An experimental investigation on added mass of three slender hotlies of revolution running with cavity is made in a cavitation tunnel with a help of a device similar to Planar Motion Mechanism(PMM) .The results show that even in the case of no cavity the transverse added mass λ22 for blunt tailed body is smaller when an axial incoming velocity exists than that when the incoming velocity does not exist. However for the streamlined body, the values of λ22 does not show obvious difference between these two conditions. The results also show that the presence of cavity leads to a further reduction of λ22 value and that this value decreases with cavitation number within the range of tested cavitation number. These results first reveal the effect of the presence of an axial cavity on transverse added mass for bodies of revolution. And also the results may lead to raising such a question as how to explain this phenomenon.
出处
《船舶力学》
EI
1998年第5期28-34,共7页
Journal of Ship Mechanics
