Analysis of a High-Speed Underwater Supercavitating Projectile Dynamics, Based on an Experiment

Authors

1 Ph.D. Student, Marine. Eng., MUT Univ., Isfahan, Iran.

2 Assoc. Prof., Aero space. Eng., MUT Univ., Teharn, Iran.

3 Assoc. Prof., Mech. Eng., MUT Univ., Isfahan, Iran.

Abstract

In this article, we extracted the forces and moment of a supercavtation projectile according to the former experimental work that is exist within literature. regards to the projectile high-speed and the illustration technique, it's safe to say that this experiment is one of the most attractive examples which is exists in the literature. In this test, projectile after leaving the launcher and moving a short path in the air, enters at a low angle to the free surface of the fluid (water). Due to the availability of the experiment test multimedia and thank to the image processing techniques in this paper, speed and acceleration values of the projectile were extracted. In the next step, forces, moments and hydrodynamic coefficients of the projectile were evaluated. The results in this study show that the value of the drag coefficient (C_D) are in good agreement with existing predictions, but the results related to the values of the lift and moment coefficients (C_L and C_M), contain new and important information in which it will change some of the former assumptions in the literature. The present study also provides useful information about projectile angular velocity which is used in the study of the stability of motion of such devices

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Main Subjects

References

[1] رامیار ع (1386) کاویتاسیون و سوپرکاویتاسیون. انتشارات دانشگاه صنعتی مالک اشتر.
[2] Rand R, Pratap R, Ramani D, Cipolla J, Kirschner I  (1997) Impact dynamics of a supercavitating underwater projectile. Proceedings of ASME Design Engineering Technical Conferences (DETC’97), Sacramento, CA, Sept.
[3] Kulkarni SS, Pratap R (2000) Studies on the Dynamics of a Supercavitating Projectile. Appl Math Model 24(2): 113-129.
[4] Mirzaei M, Alishahi MM, Eghtesad M (2015) High-speed underwater projectiles modeling: a new empirical approach. J Braz Soc Mech Sci 37(2): 613-126.
[5] Savchenko Y, Vlasenko Y, Semenenko V (1999) Experimental study of high-speed cavitated flows. Int J Eng Fluid Mech 251-257.
[6] WANG H-b, ZHANG J-z, WEI Y-j, YU K-p, JIA L-p (2005) Study on relations between cavity form and typical cavitor parameters. J Hydrodyn 2.
[7] JIA L-p, Cong W, WEI Y-j, WANG H-b, ZHANG J-z, YU K-p (2006) Numerical simulation of artificial ventilated cavity. J Hydrodyn Ser B 18(3): 273-279.
[8] Rabiee A, Alishahi M, Emdad H, Saranjam B (2011) Part A: Experimental investigation of unsteady supercavitating flows. Iranian Journal of Science and Technology Transactions of Mechanical Engineering 35(M1): 15.
[9] Rabiee A, Alishahi M, Emdad H, Saranjam B (2011) Part B: Numerical investigation of unsteady supercavitating flows. Iranian Journal of Science and Technology Transactions of Mechanical Engineering 35(M1): 31.
[10] Rabiee A, Alishahi M, Emdad H, Saranjam B (2011) Experimental investigation of bounce phenomenon. Scientia Iranica. 18(3):416-22.
[11] فروزانی ح، سرانجام ب، کمالی ر (2016) تحلیل برخورد زمان‌مند الاستوپلاستیک پرتابه پرسرعت با سطح آب. مکانیک سازه­ها و شاره­ها 281-98 :(3)6.
[12] Truscott TT, Epps BP, Belden J (2014) Water entry of projectiles. Annual review of fluid mechanics 46: 355-378.
[13] فروزانی ح، سرانجام ب، کمالی ر، ربیعی ع (2017) شبیه سازی عددی و بررسی تجربی حرکت یک جسم پرسرعت زیرسطحی. مکانیک سازه­ها و شاره­ها 230-217 :(1)7.   
[14] GUO Z-t, Zhang W, Cong W (2012) Experimental and theoretical study on the high-speed horizontal water entry behaviors of cylindrical projectiles. J Hydrodyn Ser B 24(2): 217-225.
 [15] Zhao C, Wang C, Wei Y, Zhang X, Sun T (2016) Experimental study on oblique water entry of projectiles. Mod Phys Lett B 30(28): 1650348.
[16] Wei Z, Hu C (2015) Experimental study on water entry of circular cylinders with inclined angles. J Mar Sci Technol 20(4): 722-738.
[17] Erfanian MR, Anbarsooz M, Rahimi N, Zare M, Moghiman M (2015) Numerical and experimental investigation of a three dimensional spherical-nose projectile water entry problem. Ocean Eng 104: 397-404.
[18] Mao X (2010) Nonlinear robust control design for a high-speed supercavitating vehicle.
[19] Dzielski J, Kurdila A (2003) A benchmark control problem for supercavitating vehicles and an initial investigation of solutions. Modal Anal 9(7): 791-804.
[20] Truscott TT (2009) Cavity dynamics of water entry for spheres and ballistic projectiles.
[21] Savchenko YN, Vlasenko YD, Semenenko V (1999) Experimental studies of high-speed cavitated flows. Int J Fluid Mech Res 26(3).
[22] Kiceniuk T (1954) An experimental study of the hydrodynamic forces acting on a family of cavity-producing conical bodies of revolution inclined to the flow.
Journal of Solid and Fluid Mechanics
Volume 9, Issue 1
April 2019
Pages 279-291

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