448 



1 mm 



x/o =0.198 



FIGURE 31. Photograph of multiple exposure hologram showing three stages of cavity growth near nose of blunt 



model. The pulse separations are At] = 50 usee and At2 = 100 usee. The flow is from right to left. V 

 a = 0.31. The radii of the growing cavity are indicated on the lower figure. 



10 m/s ; 



FIGURE 32. Photograph of multiple exposure hologram showing three stages of travelling bubble along blunt nose. 

 The time separations are: At] = 50 usee and At2 = 100 usee. The flow is from left to right. V = 10 m/s; 

 o = 0.31. ° 



