论文标题
一个数值模型，可预测诱导片级联反应不稳定的空洞流动行为
A numerical model to predict unsteady cavitating flow behaviour in inducer blade cascades
论文作者
论文摘要
模拟了四叶火箭发动机涡轮诱导剂的空化行为。 将不稳定空化的2D数值模型应用于诱导剂几何形状绘制的刀片级联反应。 物理模型基于一种均匀的空化方法，再加上液体/蒸气混合物的正压状态定律。 数值分辨率使用从简单算法和有限体积离散化得出的压力校正方法。附着在刀片吸入侧的板腔的不稳定性取决于流速和气腔数。 鉴定了两种不同的旋转空化的旋转空化构型，分别是亚同步和超同步的。 讨论了负责这些不稳定行为的机制，并估计了旋转空化对刀片引起的应力波动。
The cavitation behaviour of a four-blade rocket engine turbopump inducer is simulated. A 2D numerical model of unsteady cavitation was applied to a blade cascade drawn fromthe inducer geometry. The physical model is based on a homogeneous approach of cavitation, coupled with a barotropic state law for the liquid/vapour mixture. The numericalresolution uses a pressure-correction method derived from the SIMPLE algorithm and a finite volume discretization. Unsteadybehaviour of sheet cavities attached to the blade suction side depends on the flow rate and cavitation number. Two differentunstable configurations of rotating cavitation, respectively sub-synchronous and super-synchronous, are identified. The mechanisms that are responsible for these unstable behaviours are discussed, and the stress fluctuations induced on the blade by the rotating cavitation are estimated.
