Super cavity model with the coupling reaction of slender body motion and water flow

Authors

  • Tran Thu Ha Institute of Mechanics, Vietnam Academy of Science and Technology, Hanoi Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Hanoi VNU University of Engineering and Technology, Hanoi
  • Nguyen Duc Thuyen Military Technology Institute, Hanoi
  • Nguyen Thai Dung Military Technology Institute, Hanoi
  • Duong Ngoc Hai Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Hanoi VNU University of Engineering and Technology, Hanoi

DOI:

https://doi.org/10.15625/0866-7136/8488

Keywords:

cavity model, Runge-Kutta method, CFD model, coupling model

Abstract

 On the imperfect water entry, a high-speed slender body moving in the forward direction, rotates inside the cavity. The body's motion makes super cavity phenomena in the water flow. The water velocity and pressure fields interact during the body's motion. In this paper, the coupling simulation model is a combination of two sub-models: In the first sub-model, the motion of slender body running very fast underwater is simulated. The equation system of this sub-model is solved by Runge-Kutta method; In the second sub-model, the water flow and pressure field under reaction of very fast slender body motion are simulated by CFD model. The simulation results of this coupled model are compared with experiments based on magnitudes of velocity U by x0 direction and error percents for cavity diameter and length.

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Published

27-03-2018

How to Cite

Ha, T. T., Thuyen, N. D., Dung, N. T., & Hai, D. N. (2018). Super cavity model with the coupling reaction of slender body motion and water flow. Vietnam Journal of Mechanics, 40(1), 1–13. https://doi.org/10.15625/0866-7136/8488

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Research Paper

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