Table 3 Grid independence test.
Impeller only (No. of node of impeller passage) | IGV and impeller (No. of node of IGV passage) | Full component (No. of node of DV passage) | |
|---|---|---|---|
N1 | 666,773 | 550,272 | 571,540 |
N2 | 265,681 | 248,100 | 256,250 |
N3 | 115,260 | 409,164 | 114,500 |
r21 | 1.359 | 1.304 | 1.307 |
r32 | 1.321 | 1.315 | 1.308 |
\({\upeta }_{1}/{\upeta }_{1}\) | 1.00 | 0.976 | 1.043 |
\({\upeta }_{2}/{\upeta }_{1}\) | 0.993 | 0.975 | 1.042 |
\({\upeta }_{3}/{\upeta }_{1}\) | 0.972 | 0.957 | 1.026 |
p | 3.769 | 9.199 | 9.123 |
\({e}_{ext}^{21}\) | 0.00325 | 0.00014 | 0.00012 |
\({\mathrm{GCI}}_{medium}^{32}\) | 0.01412 | 0.00197 | 0.00178 |
\({\mathrm{GCI}}_{\mathrm{fine}}^{21}\) | 0.00407 | 0.00017 | 0.00016 |
