Abstract
To study the flow characteristics of the ventilated cloud cavitation under vertical emission conditions，an Improved Delayed Detached Eddy Simulation (IDDES) model is used to conduct non-constant numerical simulations with the underwater vehicle as the research object. The introduction of hybrid scale accelerates the Reynolds Average Navier-Stokes (RANS) to Large Eddy Simulation (LES) conversion calculation and improves the calculation accuracy of turbulent stresses. A vertically constrained underwater launch platform was built，and the development process of ventilated cloud cavitation was studied using the quantitative exhaust method，while the validity of the numerical method was verified. It was found that the gas-liquid interface was destabilized under the action of vortex flow. After that，part of the water phase converged through the gas-liquid interface into the ventilated cavitation，and gas-liquid mixing occurred to form cloud cavitation. The evolution of cloud cavitation is a dynamic development process，where size expansion and gas-liquid admixture are simultaneous.
| Translated title of the contribution | Numerical simulation and experiment of ventilated cloud cavitation on underwater vehicle under vertical emission conditions |
|---|---|
| Original language | Chinese (Traditional) |
| Article number | 528450 |
| Journal | Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica |
| Volume | 44 |
| Issue number | 21 |
| DOIs | |
| State | Published - 15 Nov 2023 |
| Externally published | Yes |
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