摘要
为了研究射流表面的减阻特性,提出了同轴旋转测试方法,建立了同轴旋转测试与平面测试下模型壁面所受摩擦阻力间关系的数学模型,构建了射流表面减阻测试系统.对射流表面回转体模型进行实验,研究射流孔径、射流角度、旋转速度与射流速度耦合情况下射流表面的减阻特性,并将实验结果与数值模拟结果进行对比分析.实验结果表明:射流表面在一定条件下具有较好的减阻效果;各因素对实验指标的影响按大小次序依次为射流孔径(A)、射流角度(B)、射流速度(D),最佳方案为A2B2D3,减阻率为8.565%.通过模型实验值与数值计算值比较分析,验证了实验结果的可信性及所建模型的准确性.
In order to study drag reduction characteristics of jet surface,a method of the coaxial swirling test was presented,and a mathematical model of the relationship between the coaxial swirling test and the frictional resistance of the model surface under plane test was established.Also,the drag reduction test system of the jet surface was constructed.Using the experiment of the axisymmetrical model of jet surface,the drag reduction characteristics under the circumstance of jet velocity coupling with jet diameter,jet angle and rotating speed were considered,and the experimental results and numerical simulation results were analysised comparatively.The results show that the jet surface have a better drag reduction under a certain conditions.According to the size of the order,the effects of factors on the experiment index is jet diameter（A）,jet angle（B）and jet speed（D）successively,and the optimal case is A2 B2 D3,whose drag reduction efficiency is 8.565%.The creditability of experimental results and the accuracy of modeling are demonstrated by analysing the model experimental value and the numerical simulation values relatively.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第6期22-27,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51275102)
关键词
射流表面
同轴旋转
减阻
模型实验
因素耦合
jet surface
coaxial swirling
drag reduction
modeling tests
factors coupling
