In this work, numerical simulation is used to study the stability enhancement of high speed supercavitating hydrofoils. Although supercavitation is known as one of the most effective methods for drag reduction, producing the cavity, either by ventilation or by cavitator at front of the body, may cause some instabilities on cavity surface and thus on the projectile’s motion. Therefore removing these instabilities comes as an important point of discussion. First of all, we calculate the sources of instabilities and measure respective forces and then present some approaches that significantly reduce these instabilities. One of these methods that could produce more stable supercavities is injecting of the air into the cavity unsteadily which varies through the projectile’s surface. This approach is provided by arrays of slots distributed on the projectile’s surface and unsteady injection is modeled over the surface. Furthermore, the position of ventilation, dramatically affects the stability like those in aerodynamics. In all approaches it is assumed that the supercavity covers the whole of the body, however the forces caused by the wakes, formed behind the body are taken into account. The calculation is performed at three cavitation numbers with respective velocities of 40 m/s, 50 m/s, 60 m/s.
Skip Nav Destination
ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
June 12–17, 2005
Halkidiki, Greece
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4196-0
PROCEEDINGS PAPER
Stability Enhancement of Supercavitating Projectiles by Unsteady Air Injection Available to Purchase
Yasmin Khakpour,
Yasmin Khakpour
Sharif University of Technology, Tehran, Iran
Search for other works by this author on:
Miad Yazdani
Miad Yazdani
Sharif University of Technology, Tehran, Iran
Search for other works by this author on:
Yasmin Khakpour
Sharif University of Technology, Tehran, Iran
Miad Yazdani
Sharif University of Technology, Tehran, Iran
Paper No:
OMAE2005-67045, pp. 457-466; 10 pages
Published Online:
November 11, 2008
Citation
Khakpour, Y, & Yazdani, M. "Stability Enhancement of Supercavitating Projectiles by Unsteady Air Injection." Proceedings of the ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2. Halkidiki, Greece. June 12–17, 2005. pp. 457-466. ASME. https://doi.org/10.1115/OMAE2005-67045
Download citation file:
11
Views
Related Proceedings Papers
Related Articles
Hydrofoil Drag Reduction by Partial Cavitation
J. Fluids Eng (September,2006)
Ventilation of Lifting Bodies: Review of the Physics and Discussion of Scaling Effects
Appl. Mech. Rev (January,2017)
Optical Observation of the Supercavitation Induced by High-Speed Water Entry
J. Fluids Eng (December,2000)
Related Chapters
Erosive Aggressiveness of Collapsing Cavitating Structures
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Experimental Investigation of Ventilated Supercavitation Under Unsteady Conditions
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Numerical Simulations of Tip Leakage Vortex Cavitation Flows Around a NACA0009 Hydrofoil
Proceedings of the 10th International Symposium on Cavitation (CAV2018)