acyclic potential flow的用法和样例：
- Pipe flowmeter is a very potential flow metering equipment.
- The potential flow theory is then applied to the overlap of the slipstream and the flow over the wing.
- The second part is about the airfoil analysis and design of two-dimensional inviscid incompressible potential flow.
- The aerodynamic force is solved with the second order approximation method for transonic small disturbance potential flow.