Abstract: The accurate prediction and evaluation of energy-saving effect is of great importance for ships equipped with energy saving ducts (ESDs). The CFD calculation and analysis of a typical bulk carrier equipped with ESDs are carried out for the international benchmark model of Japan Bulk Carrier (JBC). Firstly, the resistances of model ships with and without ESDs are numerically calculated by using different turbulence models and different meshes, with analysis of the wake field. The standard and RNG turbulence models are then adopted for the self-propulsion simulation of the model ships based on the analysis of the numerical results of the ship resistances and the flow field. The energy saving effect of the ESD that is predicted from the self-propulsion results is quite close to that from the model test results. It shows that the CFD calculation method in the current study can be used for the prediction and evaluation of the energy saving effect of the full ship equipped with ESDs.

Key words: energy saving duct, bulk carrier, self-propulsion, computational fluid dynamics(CFD), benchmark model Japan Bulk Carrier (JBC)

摘要： 节能效果的准确预报评估,对于船舶加装水动力节能装置而言非常重要。该文以国际标模JBC为对象,开展典型散货船加装节能导管的CFD计算分析研究：首先,开展了不同湍流模型、不同网格下带与不带节能导管的船模阻力数值计算,并对尾流场模拟结果进行了分析;然后,基于对船模阻力、流场计算结果的分析,选取了标准k-ε 和RNG k-ε 2种湍流模型开展了船模自航的CFD模拟;最后,基于自航模拟结果预报了加装节能导管的节能效果,与模型试验结果相当接近。研究表明,文中的CFD计算方法可以用于肥大型船舶加装节能导管的节能效果预报评估。

关键词: 节能导管, 散货船, 自航, 计算流体动力学, 标模JBC