Table 1 Model selection of two one-dimensional calculation methods
Selection | Calculation method | |
|---|---|---|
Case 1 | Case 2 | |
Diffuser section 1–2 section calculation method | Flow tube method | Flow tube method |
Diffuser section 2–4 section calculation method | Empirical method + Mixed method | Mixed method + Mixed method |
Jet mixing model | Quality loss | Equivalent blending |
Penetrating flux mixing constant | 1 | 1 |
Wall jet mixing constant | 0.1 | 0.2 |
Correlations used to calculate emissivity | Reeves on Distilled Fuel Correlation (non-luminous flame) | NREC 1964 correlation (glowing flame) |
Radiation dimension | One-dimensional | One-dimensional |
Whether to consider radiation heat transfer between walls | No | No |
Whether to use wall cooling | Yes | Yes |
Whether to consider the longitudinal heat conduction between walls | No | No |
Whether to conduct heat through the annular cavity air | Yes | No |