摘要
本文采用雷诺方程和雷诺应力紊流模型相结合建立起弯道的三维数学模型,并结合shukry弯道实验结果对模型进行验证。利用此模型对kinoshita型非对称弯道进行模拟研究。结果表明:非对称型弯道的高流速区比对称型弯道更加辐聚,水流动力轴线更加的不顺滑,主流区在弯顶的顶冲作用更强;对称型弯道的断面环流强度不断衰减,而非对称型弯道则不同;随着偏斜度的增大,断面环流强度在弯道前半段不断减小,后半段则相反。
Reynolds equation and Reynolds stress turbulence model are combined to build a 3D mathematical model of bend, and the model is verified according to shukry bend testing results. Then this model is used to study kinoshita asymmetric bend. The results show that high flow velocity zone of asymmetric bend is more concentrated than that of symmetric bend, water current dynamic axis of the former one is not smooth as the latter one, and the impact force of main flow is greater at the apex of bend. The intensity of circulating flow on section of symmetric bend weakens continuously. With the increase of skewness coefficient, the intensity of circulating flow on the section of asymmetric bend decreases in the first half of bend and increases in the second half of bend.
出处
《港工技术》
2016年第6期7-11,共5页
Port Engineering Technology
基金
自然科学基金资助项目(51279124)
