本课程以工程中流体机械、动力机械、容器、管道等部件中流体流动以及与部件间相互作用为研究对象，学习流体流动基本性质、描述方程、求解方法。针对流动基本方程，对理想流体势流和有旋流动、粘性流体层流、紊流流动、紊流模型、边界层理论进行介绍。目的是使学生通过分析流体运动规律，学习研究流动的方法和解决问题的方法。

Fluid mechanics is the study of the flow of fluids. Properties normally ascribed to fluids include density, compressibility and dynamic viscosity. In general, the motion of fluids is extremely complicated, including highly nonlinear phenomena like turbulence, and cannot be described exactly. The study of the course is a central theme of modern applied mathematics. It is used to model a vast range of physical phenomena and plays a vital role in science and engineering. Tensors provide a natural and concise mathematical framework for formulating and solving problems in areas of physics. In many significant parts of the course Cartesian tensor calculus is needed, and hence a short description of this technique is given in the beginning of the course together with the conception of gradient, divergence, vorticity and some useful mathematics.Navier-Stokes equations are derived from the perspective of Continuum Mechanics. In connection to this, some analytical solutions of the governing equations are studied. Vorticity equations is introduced and applied on inviscous flows. Conformal representation and singularity method is used to solve some simple inviscid potential flow. Perturbation method and characteristic method is introduced for one dimensional compressible flow. The third part of the course is devoted to viscous fluid flow. Basic laminar and turbulent flow concepts are presented. In simple geometries and when certain simplifying properties hold, some laminar flow systems are amenable to exact solutions. As for turbulent flow, the Reynolds transport equations are derived, and based on these, the kinetic energy budget is discussed. The equilibrium hypothesis of Kolmogorov is presented and the basic physical ideas behind simple turbulence models are presented. Some common models used in commercially available codes are also discussed briefly.From the view point of the governing equations some fundamental aero acoustics is introduced as well.