45 



40 



35 



30 



25 



20 



15 



10 



5 — 



MEASURED 



FLOW REGIMES 



AMPLIFICATION FACTOR " ,, 

 e e 



e 3 e 5 e 7 e 9 / / 



/ O LAMINAR (1) 



CD WAVELIKE (2) 



3 INTERMITTENT (3) 



• TURBULENT 

 O (2) AND (3) 



• (3) AND (4) 



NEUTRAL 

 STABILITY 



O O CD <D 



10 



15 

 x/D 



20 



25 



30 



Figure 9 — Measured Flow Regimes on Model 3, 

 Compared with Amplification Factor 



27 



