Caviation behind Tension Waves
The abrupt deceleration of a flow and the suitable reflection of the resulting pressure wave is the most convenient method for the generation of tension waves and for the examination of cavitation behind those waves. In this paper two facilities using this method are described, allowing the examination of the propagation of tension waves and the resulting cavitation bubble clusters. In a tube the interaction between the cavitation nuclei and the reflected wave trains causes periodically generated bubble fields. Various physical effects are taking place in the bubble cluster at the same time, but it was possible to observe some aspects seperately. The dynamic instability of a bubble during its collapse permits to change the nuclei density in the liquid. Pressure oscillations inside the bubble cluster are explained by a comparison of numerical and experimental results. A bubble selection mechanism in the cluster, which was examined in the experiments, is caused by differences in the surface tension between bubbles of different radii. Pressure oscillations and bubble selection can be described in a first order approximation by an approach of Meier (1987), who proposed to consider each bubble of a cluster to be the centre of a surface tension driven flow. For a detailed description of cavitation behind tension waves these effects have to be taken into account.
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- Bode, J., Laake, A. and Meier, G.E.A. (1987) Daga’ 87Google Scholar
- Bode, J., Meier, G.E.A. and Rein, M. (1990) ZAMM (accepted for publication )Google Scholar
- Brown, S.J. (1967) M. S. Thesis, Pennsylvania State UniversityGoogle Scholar
- Hentschel, W. and Lauterborn, W. (1984) DAGA’ 84, 469–472Google Scholar
- Hill, L.G. and Sturtevant, B. (1989) ( Proc.: IUTAM Symposium Adiabatic Waves in LiquidHHVapour System )Google Scholar
- Joukowski, N.E. (1898) Ac. Imp. des Sc. St Petersburg, Vol. 9 Nr. 5Google Scholar
- Kedrinskii, V.K. (1987) Proc. ICA 12, J4–8Google Scholar
- Kedrinskii, V.K. (1978) J. Appl. Mech.and Tech. Phys. Vol. 19Google Scholar
- Meier, G.E.A. (1987) MPI für Strömungsforschung Ber. (7/1987) GöttingenGoogle Scholar
- Rein, M. and Meier, G.E.A. (1988) In: Furuya, O. (ed.) Cavitation and Multiphase Flow Forum-1988. New York, pp.40–44.Google Scholar
- Rein, M. and Meier, G.E.A. (1990a) Acustica (publication scheduled for Vol. 10, part 4)Google Scholar
- Rein, M. and Meier, G.E.A. (1990b) to be publishedGoogle Scholar
- Szumowski, A. (1989) private communicationGoogle Scholar