Cavitation commonly occurs in the hydraulic machineries like inducers. Existing computational fluid dynamics could provide relatively precise prediction for water, but may fail to simulate the cryogens cavitation precisely. Based on the modified Merkle cavitation model, this paper studies the cavitation suppression in an inducer in thermo-sensitive fluid with special emphasis on thermodynamic effect. The cavitation characteristics of an inducer under different working conditions for water and liquid nitrogen were analyzed systematically. Through the comparative analysis of the cavitation morphology, temperature drop, axial vapor volume fraction and axial pressure distribution, the cavitation in water was found to be very large and continuous, whereas that in liquid nitrogen was found to be relatively small and discontinuous, indicating that the stronger thermodynamic effect in liquid nitrogen can effectively suppress the development of cavitation. The cavitation performance of inducer showed good improvement in liquid nitrogen than that in water.

空化通常发生在液压机械中，如诱导器。现有的计算流体动力学可以为水提供相对精确的预测，但是可能无法精确地模拟制冷剂的空化现象。基于改进的Merkle空化模型，本文研究了热敏流体诱导器中的空化抑制，并重点研究了热力学效应。系统地分析了水和液氮在不同工作条件下诱导剂的空化特性。通过对空化形态，温度下降，轴向蒸气体积分数和轴向压力分布的比较分析，发现水中的空化非常大且连续，而液氮中的空化相对较小且不连续，表明在液氮中更强的热力学作用可以有效地抑制空化的发展。诱导剂的空化性能在液氮中显示出比在水中的改善。