1. b. The frequency tracks for stage numbers m=5 and m=7-12 are generally in good agreement with the results of Equation 2. The slopes of the frequency tracks for stagenumbers m=7-12, however, are smaller than those of the empirical model. Thisdiscrepancy is addressed in Section 7.
2. Fig. 7 Strouhal numbersforstage numberm=6 assumingshear layer initiation at forward or aft cavity face. Impingement st nozzlethroat. Timecorrespondstonominalpmpellsnt burn rate. Largest pressure oscillations occur in the time period 159-65 seconds.