中文摘要：

应用流体力学是钱学森提出的工程科学思想在流体力学领域中的体现,倡导从流动特征出发,建立相应的理论模型,然后运用数学方法求解得出理论结果,从而深入分析流动物理.文章以两个方向的研究实例来阐述应用流体力学的具体实践.

英文摘要：

In the modem fluid mechanics, the flows become more and more complex, that leads to the difficulties in theoretical modelling and analyzing the flow physics. It is known that the theoretical modelling approach, important as experiments and numerical simulations, is part of the applied fluid mechanics, which would be regarded as the application of the engineering science concept proposed by Tsien Hsue-Shen in fluid mechanics. Based on the flow characteristics, the flow can be simplified and the corresponding theoretical model can be established, then it can be solved by mathematical methods and the flow physics can be analyzed. In the present paper, some samples in two research directions were selected to indicate the experience in the practice of applied fluid mechanics.