轴对称体与导管推进器组合体的三维复杂流场的计算与分析  

Numerical Simulation of 3-D Integrative Viscous Complicated Flow Field Around Axisymmetric Body with Ducted Propulsion

作　　者：王涛[1] 周连第[1] 张鑫[2] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]海军装备部,北京100841

出　　处：《船舶力学》2003年第2期21-32,共12页Journal of Ship Mechanics

摘　　要：本文用CFX—TASCflow对轴对称体与导管推进器组合体的三维复杂粘性流场(Re=4.8×107)进行了模拟计算。本问题用RANS方程和k -ε模型联合求解 ,其实现过程稳定而且高效 ;求解中采用ILU(IncompleteLowerUpperfactorization)光顺技术 ,适合于采用AMG/ACM方法 ,同时也比较容易在质量和动量方程中将速度和压力变量耦合求解。数值结果具有较好的规律性和合理性。与此同时 ,本文得出了用试验方法难以测量的大量的数值结果 ,分析了推进器在非自航状态和自航状态下的性能、导管内部轴向、径向和周向速度场、压力场在相互作用中的具体形态和结构 ,并定性地分析了它们对水动力噪声、空泡生成以及振动的影响 ,更重要的是为减少这些不利影响明确了解决的办法 ,为导管推进器的工程设计提供了切实可行的理论分析方法和技术思想 ,对工程实际具有重要的指导作用。CFX-TASCflow is used to solve inner and outer 3 - D viscous incompressible turbulent flow (Re=4.8×107) around axisymmetric body with ducted propulsion hawing rotor and stator. Governing equation is RANS equation combined with standard k-Ε model. The discretion is a finite volume method based on a finite element approach or representing the geometry. The multigrid arithmetic is an Algebraic Multigrid method (AMG) based on the Additive Correction Multigrid (ACM) strategy. The relaxation scheme is an ILU (Incomplete Lower Upper) method. It is good at coupling together the velocity and pressure variables for the coupled mass and momentum equations. The numerical results are reasonable. At mean time, this paper has obtained abundant information that are difficult to be measured in the experiment, analyzed the performance of the propulsion at the unself-propelled and self-propelled state, gave the vivid structure and shape of flow field in the interaction between components inside duct, and implied the effects of uneven distribution of pressure on the blade at different angle on the noise and vibration. This paper provides a kind of analysis method and the engineering and technical thought for the design of the duct propulsion. It will be play an important role in real engineering, and proves the that the CFX - TASCflow is efficiency and rationality.

关 键 词：轴对称体 导管推进器 组合体 三维复杂流场 计算 数值模拟 

分 类 号：U661.313[交通运输工程—船舶及航道工程] O357[交通运输工程—船舶与海洋工程]