Data underlying the characteristics of bubbly shock waves in a cavitating axisymmetric venturi.

With time-resolved X-ray densitometry and pressure measurements at multiple axial locations, we study the characteristics of bubbly shock fronts in a cavitating axisymmetric venturi at different cavitation numbers (sigma). The main aim of this work was to examine why the vapour shedding mechanism changes from bubbly shock wave dominated to re-entrant jet driven with increasing sigma. Time-resolved vapour fraction fields of a single shedding cycle at sigma = 0.47 are also included. The full details of the study can be found in the underlying publication. The dataset can be used to validate numerical models aimed at simulating complex multiphase flows.

本研究借助多轴向位置的时间分辨X射线密度测量与压力测量手段，针对不同空化数（cavitation number，记为σ）下空化轴对称文丘里管内的泡状激波前沿特性开展研究。本研究的核心目标为阐释：随着σ增大，蒸汽脱除机制会如何从以泡状激波主导转变为由回流射流驱动。本数据集还包含了σ=0.47工况下单个脱除循环的时间分辨气相分数场数据。该研究的完整细节可参阅相关正式发表文献。本数据集可用于验证旨在模拟复杂多相流的数值模型。