Time of flight measurements for strong shocks emitted from transient cavitation in 300 bar resonator

The behavior of shocks emitted from transient cavitation in acoustic cavitation systems with static pressures up to 300 bar is explored using photomultiplier tubes, hydrophones, Schlieren, and Shadowgraphic methods. Shocks emitted from strong implosions travel initially at supersonic velocities, leading to a shortening of the time of flight (TOF) from implosion site to detector as compared to sound speed motions. A larger difference between expected sonic and actual supersonic translation times is indicative of higher stagnation pressures. Experimental results are indicative of possible stagnation pressures in the Mbar range and place constraints on computer models. [Work supported by SMDC Contract no. W9113M‐07‐C‐0178.]