Along with the anti-cavitation performance, the high speed and the high power density, are the main trends in the development of centrifugal pumps. At present, the most effective method is to install an inducer in front of the impeller. However, the tip leakage of the inducer results in the vortex cavitation at the blade leading edge of the inducer, and the cavitating flow inside the inducer seriously interferes with the hydraulic behavior of the inducer as well as the impeller with the development of the cavitation, thus to badly affect the operational reliability of the high-speed centrifugal pump. In the present paper, the cavitating flow in a high-speed centrifugal pump with an inducer is investigated by numerical simulations and visual experiments for different cavitation numbers. A typical evolution process of the cavitation is shown, including the inception, the development and the deterioration. A general description of the pump head-drop phenomenon is made through the study of the local and global flow fields, and the relationship between the vapor distribution and the static pressure distribution along the inducer is determined to describe the evolution of the cavitation. This paper intends to provide the foundation for studying the overall cavitation state of a high-speed centrifugal pump, and designing the inducer with a better cavitation resistance.

除抗气蚀性能外，高速和高功率密度是离心泵发展的主要趋势。目前，最有效的方法是在叶轮前安装一个诱导器。但是，诱导器的尖端泄漏会导致在诱导器的叶片前缘产生涡流空化，并且诱导器内部的空化流严重干扰了诱导器以及叶轮的水力行为，从而影响了空化的发展，因此严重影响了高速离心泵的运行可靠性。在本文中，通过数值模拟和目视实验，研究了具有诱导器的高速离心泵中的空化流，研究了不同的空化数。显示了空化的典型演变过程，包括开始，发展和恶化。通过研究局部和整体流场，对泵的压降现象进行了一般性描述，确定了沿诱导器的蒸汽分布和静压分布之间的关系，以描述空化的演变。本文旨在为研究高速离心泵的整体气蚀状态，设计出抗气蚀性能较好的诱导器提供基础。确定沿诱导器的蒸汽分布和静压分布之间的关系，以描述空化的演变。本文旨在为研究高速离心泵的整体气蚀状态，设计出抗气蚀性能较好的诱导器提供基础。确定沿诱导器的蒸汽分布和静压分布之间的关系，以描述空化的演变。本文旨在为研究高速离心泵的整体气蚀状态，设计出抗气蚀性能较好的诱导器提供基础。