Cavitating Propeller Experiment (CAPREX III): Measurement and Prediction of Tunnel Pressures

Autor:	Jin-Keun Choi, Spyridon A Kinnas, Richard W. Kimball
Rok vydání:	1998
Předmět:	Numerical Analysis Engineering business.industry Applied Mathematics Mechanical Engineering Flow (psychology) Propeller Ocean Engineering Inflow Mechanics Structural engineering Wake Water tunnel Harmonics Cavitation business Civil and Structural Engineering Supercavitation
Zdroj:	Journal of Ship Research. 42:233-248
ISSN:	1542-0604 0022-4502
DOI:	10.5957/jsr.1998.42.3.233
Popis:	This paper first describes Phase III of the CAvitating PRopeller Experiment (CAPREX) performed at MIT's variable pressure water tunnel. The three components of the screen-generated nominal wake inflow were measured using an LDV system. The unsteady pressure field on the upper tunnel wall for the first three blade harmonics was also measured in a 5 × 5 grid above the propeller tip, for various propeller cavitation conditions from fully wetted to supercavitating. Then, a recently developed numerical method which models the flow of a cavitating propeller inside a tunnel is used for the calculation of the pressures on the tunnel walls. The effects of a time-varying blade cavity source and of the flexibility of the tunnel walls are included in the calculation. Lastly, the amplitudes of the first blade harmonics of the predicted pressures are compared directly with those measured in the experiment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f21bfb51232b4847562a40ea930f47d https://doi.org/10.5957/jsr.1998.42.3.233 Zobrazit plný text záznamu