Research Article
Investigation of the Effects of Length to Depth Ratio on Open Supersonic Cavities Using CFD and Proper Orthogonal Decomposition
Table 3
Experimental and calculated mode frequencies.
| | Frequency modes | Computational values | Modified Rossiter form. | Rossiter form. | Discrepancy (%) | Discrepancy
Rossiter form. (%) |
| | 1 | f1 | 4823.0 | 4566.7 | 5622.2 | 5.6 | 14.2 | | 1 | f2 | 10034.0 | 10656.0 | 11244.4 | 5.8 | 10.7 | | 1 | f3 | — | 16744.0 | 16866.6 | — | — | | 3 | f1 | 1940.0 | 1522.2 | 1663 | 27.0 | 16.7 | | 3 | f2 | 3880.1 | 3551.8 | 3659 | 9.2 | 6.0 | | 3 | f3 | 5559.2 | 5581.5 | 5488 | 0.4 | 1.3 | | 5 | f1 | 1037.0 | 900.8 | 1109.1 | 15.0 | 6.5 | | 5 | f2 | 2106.0 | 2102.0 | 2218.0 | 0.19 | 5.0 | | 5 | f3 | 3160.0 | 3303.1 | 3327.0 | 4.5 | 5.0 | | 7.6 | f1 | 609.8 | 600.55 | 739.4 | 1.5 | 17.5 | | 7.6 | f2 | 1441.0 | 1401.3 | 1478.7 | 2.8 | 2.5 | | 7.6 | f3 | 2273.0 | 2202.1 | 2218.1 | 3.2 | 2.5 | | 10 | f1 | 388.0 | 450.41 | 554.5 | 13.7 | 30.0 | | 10 | f2 | 1053.0 | 1051.0 | 1109.1 | 0.19 | 5.1 | | 10 | f3 | 1663.0 | 1651.5 | 1663.5 | 0.71 | 0.1 |
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