Explanation of the Influence of Inflow Air Content on the Lift of Cavitating Hydrofoils

Author:

Amromin Eduard1

Affiliation:

1. Mechmath LLC, Federal Way, WA 98003 e-mail:

Abstract

According to several known experiments, an increase of the incoming flow air content can increase the hydrofoil lift coefficient. The presented theoretical study shows that such increase is associated with the decrease of the fluid density at the cavity surface. This decrease is caused by entrainment of air bubbles to the cavity from the surrounding flow. The theoretical results based on such explanation are in a good agreement with the earlier published experimental data for NACA0015.

Publisher

ASME International

Subject

Mechanical Engineering

Reference16 articles.

1. The Effect of Nuclei Density on Cavitation Inception of the Separated Flow on a Foil;Billet,1993

2. Kawakami, D., Qin, Q., and Arndt, R. E. A., 2003, “Can Water Quality Affect the Lift Dynamics of Cavitating Hydrofoils?,” Fifth International Symposium on Cavitation (CAV), Osaka, Japan, Nov. 1–4.http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=6757CF9BC42529611ABFF1CBD2CAE4E5?doi=10.1.1.503.3005&rep=rep1&type=pdf

3. Analysis of Cavitation Inception and Desinence Behind Surface Irregularities;Phys. Fluids,2016

4. Diffusion Induced Bubble Population Downstream of a Partial Cavity;ASME J. Fluids Eng.,1997

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