About this article
Published Online: Mar 17, 2025
Received: Oct 04, 2024
Accepted: Jan 31, 2025
DOI: https://doi.org/10.2478/amns-2025-0838
Keywords
© 2025 Chao Xie, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
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Water parameters
| Density/(kg/m3) | Surface tension/(N/m) | Viscosity/(Pa·s) |
|---|---|---|
| 998.2 | 0.0719404 | 0.00298 |
Computational mesh parameters
| Mesh | Mesh quantity/10,000 | Mesh orthogonal quality |
|---|---|---|
| (a) Conventional medical injection pump nozzle | 2 | 0.78 |
| (b) Small inclination angle injection pump nozzle | 2.3 | 0.8 |
| (c) Three-stage nozzle structure | 3 | 0.76 |
Boundary conditions of the nozzle model
| Inlet velocity/(m/s) | Turbulence intensity/% | Turbulent viscosity ratio | Initial total pressure/MPa | Contact angle/(°) | Inlet water volume fraction/% |
|---|---|---|---|---|---|
| 0.3mm/s | 2 | 10 | 20 | 70 | 100 |
Comparison of nozzle injection efficiency
| Nozzle type | Nozzle outlet velocity (m/s) | Injection efficiency improvement |
|---|---|---|
| (a) Conventional nozzle | 0.12 | |
| (b) Small flow inclination angle injection pump nozzle | 0.14 | 16.67% |
| (c) Three-stage nozzle structure | 0.18 | 50.00% |