482 



Covily area (cm'l p 131 Pa /scale unit 



50 r 



40 



20 



FIGURE 17. Cavity area and generated pres- q 

 sure. Oscillation period -1. 



ao = 3 

 a =3' 

 fosc = 15Hz 



50 scale units 



^'vJw»«.X-***' 





5 10 15 20 25 



30 35 



t (milliseconds) 



25 30 



t {milliseconds) 



Cavity area (cm^) 

 70 



A l_., = 50mm 



'^'Nm;x,^ 



35 40 



t (milliseconds) period 4 



FIGURE 18. Cavity area and gen- 

 erated pressure. Oscillation 



Cavity area (cm^) p 131 Pa/scaie unit 



50 r 



FIGURE 19. Cavity area and generated pres- 

 sure. Oscillation period 6. 



a„ = 3' 

 5 =3* 

 !„.= '5 Hz 



50 scale units 



10 15 20 25 30 



t (milliseconds) 



10 15 20 



25 30 



t (milliseconds) 



