Abstract
To understand heat transfer characteristics of regenerative cooling in round to square nozzle (RS nozzle), numerical simulation was employed. Governing equations for hot gas, solid wall and coolant were established respectively, and calculation of flow-heat couple transfer was carried out. Flow field and temperature field in RS nozzle were obtained. Calculation results show: (1) In divergent segment after transforming to square, if contour was not smooth, there would be a compression wave, which raised temperature and heat flux in gas wall and made this place become a dangerous segment. (2) Temperature in unsmooth wall was higher than that in smooth wall, which made temperature distribution along circumference un-uniform. (3) Ribs and highly conductive copper alloy strengthened heat transfer in cooling channel, and made temperature near rib lower than that near cooling channel bottom.
| Original language | English |
|---|---|
| Pages (from-to) | 298-302+315 |
| Journal | Tuijin Jishu/Journal of Propulsion Technology |
| Volume | 25 |
| Issue number | 4 |
| Publication status | Published - Aug 2004 |
| Externally published | Yes |
Keywords
- Liquid propellant rocket engines
- Nozzle
- Numerical calculation
- Regenerative cooling
- Temperature distribution