The motion equations of the unsteady air and water in jig are obtained by the method of fluid dynamics, and the fluid parameters in jig at different characteristic curve of air valve are calculated by use of numerical method.

• 用流体力学方法导出了跳汰机内空气?水动力学体系的运动规律，并通过数值计算得出了不同风阀期特性下的跳汰机内的水流运动。