摘要
为了降低舰艇在高速航行时受到的空气和海浪阻力,船型的设计必须要符合流体动力学特性。由于舰艇的几何外型越来越复杂,促使研究人员寻找精度更高、收敛速度更快的CFD计算方法。经过几十年的发展,CFD计算方程和计算格式发展迅速,产生了拉普拉斯方程、欧拉方程、小扰动速势方程、通量差分分裂迎风格式等,在航空航天、船舶工业、飞行器设计等领域获得了广泛的应用。本文针对高速舰艇在大攻角条件下的航行状态,利用基于Roe格式的低耗散E-CUSP迎风格式算法,对舰艇细长旋成体的流体动力学特性进行了分析和大攻角分离流数值模拟。
In order to reduce the resistance of naval ships to air and sea waves at high speed,the design of ship type must comply with the hydrodynamic characteristics.Because the geometry of ships is becoming more and more complicated,researchers are seeking to find CFD computing methods with higher precision and faster convergence speed.After decades of development,the CFD equations and the numerical format of the rapid development of the Laplasse equation,Euler equation,perturbation potentialequation,flux difference splitting upwind scheme and so on,have been applied widely in the field of aerospace,shipbuilding,aircraft design,etc..Aiming at the high-speed vessels at large angle of attack under the condition of the navigation state,using Roe format and low dispersion E-CUSP upwind algorithm based on fluid dynamics of slender body vessels were analyzed and numerical simulation of flow separation at high angles of attack.
出处
《舰船科学技术》
北大核心
2017年第18期7-9,共3页
Ship Science and Technology
基金
重庆市高等职业技术院校新技术推广资助项目(GZTG201609)
重庆市教委科学技术研究资助项目(KJ1732434)
关键词
CFD
小扰动速势方程
低耗散E-CUSP迎风格式
大攻角
数值模拟
CFD
small disturbance potential equation
low dissipation E-CUSP upwind scheme
high angle of attack
numerical simulation