The rotating flash flow has rarely been studied, although its characteristics affect significantly the performance of the two-phase flow turbine. In this paper, through analyzing the flashing flow obtained by CFD methods, which is validated with the experimental data, the relationships of average flow parameters under various rotational speeds were studied theoretically and numerically using the flow equations established on the Frenet coordinate system. The ratio of the mass flow rate under various rotational speeds was formalized and found to be dependent on the rotational speed and thermophysical properties. The generation and development of vapour were revealed and correlated to the geometry of the channel. The secondary flow in the flashing rotating channel was discussed and found to rotate in opposite directions upstream/downstream of the throat. The flashing induced near the throat had the effect on flow homogenizing in the normal direction of the cross-section. The analysis could be further applied to the analogy of the secondary flow between the rotating single-phase flow and the rotating flashing flow.

旋转闪蒸流很少被研究，尽管其特性显着影响两相流涡轮机的性能。本文通过对CFD方法得到的闪蒸流进行分析，并用实验数据进行验证，利用在Frenet坐标系上建立的流动方程，从理论上和数值上研究了不同转速下平均流动参数的关系。各种转速下的质量流量比被形式化并发现取决于转速和热物理特性。蒸汽的产生和发展被揭示并与通道的几何形状相关。讨论了闪蒸旋转通道中的二次流，发现在喉道上游/下游以相反方向旋转。在喉部附近引起的闪蒸对横截面法线方向的流动均化有影响。该分析可以进一步应用于旋转单相流和旋转闪蒸流之间的二次流的类比。