新型压载块水动力学特性的三维精细数值模拟

Three-dimensional precise numerical simulation ofhydrodynamic characteristics of new ballast block

针对荆江航道整治工程中使用的仿沙波软体排中压载块质量大、经济性差的问题,在普通型压载块的基础上改进形成一种新型压载块。为分析对比2种压载块的水动力学特性,采用三维精细数值模拟的方法,分别从主流方向流速、剪切流速及湍动能3方面分析2种压载块的水动力学特性,得出新型压载块在节约混凝土用量19.8%的同时仍呈现出较优的水动力学特性。研究成果可为软体排的压载块设计提供支撑。

In view of the problems of large weight and poor economy of ballast blocks in the sand-wave imitating soft mattress used in Jingjiang waterway regulation project,this paper develops a new type of ballast block on the basis of the ordinary ballast block.To analyze and compare hydrodynamic characteristics of the two kinds of ballast blocks,this paper uses a three-dimensional precise numerical simulation method to analyze the hydrodynamic characteristics of the two kinds of ballast blocks from three aspects of mainstream direction velocity,shear velocity,and turbulent kinetic energy,respectively.The paper concludes that the new ballast block still presents better hydrodynamic characteristics while saving 19.8%of concrete consumption.The research results can provide support for the ballast block design of the soft mattress.