摘要
为了研究不同湍流模型在螺旋桨水动力性能预报中的适用性,运用计算流体力学软件对粘性流场中螺旋桨的敞水性能进行了计算研究.分别采用标准模型k-ε、RNGk-ε模型和雷诺应力方程模型(RSM)模拟了敞水螺旋桨在不同进速系数下的推力系数、转矩系数等.由3种湍流模型的预报结果与试验值的对比得出:标准模型对螺旋桨水动力性能的数值预报存在明显的缺陷;RNGk-ε模型相对于标准k-ε模型有所改进,但这种改进仍然没有抛弃基于涡粘性假设的基础,对预报精度的改进是有限的;而RSM模型完全抛弃了涡粘性假设,完全求解雷诺应力的微分输运方程,并且考虑了壁面对雷诺应力分布的影响,因此具有较其他2种模型更强的模拟能力.
In order to evaluate the applicability of turbulent models when predicting the hydrodynamic performance of propellers, computational fluid dynamics （CFD） software was used to calculate the hydrodynamic performance of a propeller in the viscous flow region. The standard model, the RNG model and the Reynolds stress model （RSM） were used respectively to simulate thrust and torque coefficients at different advance coefficients. Comparisons be- tween the computed results and experimental data show that the standard model has obvious limitation when predic- ting the hydrodynamic performance of a propeller; the RNG model brings limited improvements in precision of pre- diction relative to the standard model. However, RSM fully abandons the eddy viscosity hypothesis to solve the Reynolds stress＇s differential transport equations and considers the wall＇s influence on the distribution of Reynolds stress, so it simulates better than the other two models.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2009年第5期481-485,共5页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(10702016)
关键词
螺旋桨
水动力性能
湍流模型
粘性流场
propeller
hydrodynamic performance
turbulent model
viscous flow
