A Comparative Study of Supercavitation Phenomena on Different Projectiles Shapes in Transient Flow by CFD | ||||
| The Egyptian International Journal of Engineering Sciences and Technology | ||||
| Article 4, Volume 19, EIJEST, Vol. 19, 2016, June 2016, Page 282-296 PDF (2.01 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eijest.2016.97134 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M Mansour* 1; MH Mansour2; N Mostafa3; M Abu Rayan3 | ||||
| 1Aeronautical Eng., Mansoura University, Egypt | ||||
| 2Mechanical Power Department, Mansoura University, Egypt | ||||
| 3Mechanical Power Department, Zagazig University, Zagazig, P.O. 44519, Egypt | ||||
| Abstract | ||||
| Body shape of high-speed underwater vehicles has a great effect on the Supercavitation behaviour. The transient flow around either partially cavitating or supercavitating body affects the trajectory of high-speed underwater vehicles. Commercial code (ESI-CFD ACE+, V 2010) was used to simulate the supercavitation around two different shapes of a projectile with their noses of hemispherical shape and telescopic shape. Also, conical and blunt projectile shapes were considered. Also, a comparison between two different designs of grid was performed numerically. Grid designs were structured and unstructured grids. Navier-Stokes equations were used as governing equations for simulating supercavitation. Cavity shape was determined over projectile body and around wake. Also, two-dimensional flow field around the cavitating body was determined. Projectile body has a diameter about 0.4 times its length (0.4L). In the case of the Blunt end there is a strong wake effect. The ESI-CFD code (2010) is valid for observing the supercavitation phenomena. Unstructured grid is more accurate than structured one in simulating supercavitation. | ||||
| Keywords | ||||
| Supercavitation; Structured grid; Unstructured grid; ESI-CFD; Hydrofoil; Projectile; Shape optimization | ||||
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