典型散货船加装节能导管节能效果数值评估研究  

Numerical evaluation of energy-saving effect for typical bulk carriers equipped with a stern duct

作　　者：金奕星 吴乘胜[1] 余昕 JIN Yi-xing;WU Cheng-sheng;YU xin(China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2023年第7期959-973,共15页Journal of Ship Mechanics

基　　金：船舶工业CAE软件关键技术研究资助项目(CB23N21-2)。

摘　　要：节能效果的准确预报是船舶加装节能装置的重要依据,然而节能效果的评估涉及船体、节能装置、螺旋桨相互之间复杂的流动干扰问题,准确预报的难度很大。本文以国际标模JBC为对象,开展典型散货船加装节能导管前后节能效果数值评估研究。首先开展不同湍流模型、不同网格下加装节能导管前后的船模阻力数值计算,并对尾流场模拟结果进行分析,研究湍流模型和计算网格对计算结果的影响;随后开展JBC螺旋桨模型敞水性能数值计算,验证本文所采用计算方法可用于多体相对运动问题的数值模拟。基于上述研究,选取标准k-ε和RNG k-ε两种湍流模型开展船模加装节能导管前后的自航CFD模拟,并基于船模自航数值模拟结果预报出加装节能导管的节能效果与模型试验结果相当接近。研究工作表明,本文的CFD计算方法可以用于船舶加装节能导管节能效果的预报评估。The accurate prediction of energy-saving effect is an important basis for installing an energy-sav⁃ing device(ESD)on a ship.However,the evaluation of energy-saving effect involves the complex flow inter⁃ference among the hull,ESD and the propeller,so it is very difficult to predict accurately.Investigation on nu⁃merical evaluation of energy-saving effect for a typical bulk carrier equipped with a stern duct was carried out in this paper by using the benchmark model JBC.CFD computations of resistance for the ship model with and without ESD by using different turbulence models and different meshes were carried out firstly,and the computational results of the wake field were analyzed.These CFD calculations and analyses were used to study the influence of turbulence models and computational grids on the results.Then,CFD computations of open-water performance of JBC propeller were carried out.The results show that the method used in this pa⁃per can be used in the numerical simulation of multi-body relative motion problems.Based on the above re⁃search,numerical simulations of self-propulsion for JBC model by using standard k-εand RNG k-εturbu⁃lence models were conducted.Prediction of energy-saving effect was carried out based on self-propulsion simulation,and the result was quite close to that of the model test.The research work in this paper can pro⁃vide an effective method for the prediction of energy-saving effect for ships equipped with a stern duct.

关 键 词：节能导管 自航 螺旋桨敞水 交界面 数值评估 

分 类 号：U661.3[交通运输工程—船舶及航道工程]