基于船舶阻力计算方法确定浮泥的适航密度值  

Determination of nautical density of fluid mud based on ship resistance calculation

作　　者：高志亮[1] 庞启秀[1] 张瑞波[1] 

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《水道港口》2015年第4期285-289,共5页Journal of Waterway and Harbor

基　　金：中央级公益性科研院所基本科研业务费专项资金(TKS130201;TKS140201);留学人员科技活动项目择优资助经费

摘　　要：效仿通过船模阻力试验来界定浮泥适航密度值的方法,提出采用船舶阻力计算方法确定浮泥的适航密度值。基于求解NS方程的CFD方法,建立了模拟浮泥中船舶运动流场的数学模型,模型中浮泥的本构关系用改进的Herschel-Bulkley模型来描述。以连云港航道现场泥样和超大型油船KVLCC2为例,采用所建立的数学模型计算了船舶以不同速度在不同密度浮泥中航行受到的阻力。通过数学手段分析了船舶阻力随浮泥密度变化的趋势,确定该港口航道浮泥的适航密度值为1 210 kg/m3,该值与采用流变试验方法和船模阻力试验方法得到的适航密度值接近,证明了文章提出方法的有效性。Following the model test for ship resistance measurement, the method based on ship resistance cal-culation was proposed to determine the nautical density of fluid mud. The CFD method based on solving the NS equations was applied to calculate the resistance of ship advancing in fluid mud. The modified Herschel-Bulkley model was employed to describe the constitutive relation of fluid mud. To test its performance, the proposed method was applied to calculate the resistance of a KVLCC2 tanker in fluid mud dredged from Lianyun port. Based on the mathematical analysis of the changing trend between computed ship resistance and mud density, the nautical densi-ty for this port was defined as 1 210 kg/m3, which agreed well with the values defined by the rheology test and ship model test.

关 键 词：船舶阻力 计算流体动力学 浮泥 适航密度 

分 类 号：U661.311[交通运输工程—船舶及航道工程]