شبیه‌سازی عددی حرکات سه درجه آزادی زیردریایی در امواج نامنظم جهت تخمین نیروی درگ

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه صنعتی مالک اشتر اصفهان، اصفهان، ایران

2 استادیار، دانشگاه صنعتی مالک اشتر اصفهان، اصفهان، ایران

3 استاد، دانشگاه صنعتی مالک اشتر اصفهان،اصفهان ، ایران

4 دکتری تخصصی، دانشگاه صنعتی مالک اشتر اصفهان،اصفهان ، ایران

چکیده

در مطالعه حاضر شبیه‌سازی حرکت زیردریایی در نزدیکی سطح آزاد آب در معرض امواج نامنظم انجام شده است. در این مقاله از روش URANS  با رویکرد شبکه‌بندی اورست و روش کسر حجمی سیال جهت شبیه‌سازی سطح آزاد آب در نرم‌افزار استار سی‌سی‌ام استفاده شده است. هندسه موردمطالعه در این شبیه‌سازی زیردریایی هوشمند بدون سرنشین سابوف با ملحقات است. ازآنجاکه آزادی حرکات زیردریایی می­تواند اثر قابل‌توجهی بر نتایج نیروی درگ بگذارد، شبیه‌سازی‌ها در حالتی که زیردریایی در سه جهت هیو، پیچ و رول آزاد باشد انجام و نیروی درگ محاسبه شده است. همچنین اثر زوایای برخورد و مشخصات مختلف امواج بر نیروی درگ مورد بررسی قرار گرفته است. نتایج نشان می‌دهد با افزایش دامنه حرکات پیچ ناشی از افزایش ارتفاع موج، نیروی درگ نیز افزایش می‌یابد. علاوه بر این در امواج پشت سر نوسانات نیروی درگ حداقل است و حداکثر مقدار نیروی درگ محاسبه شده در امواج روبرو است. در امواج با ارتفاع مشخصه m43/0 نیز حداکثر نیروی درگ در امواج روبرو N444 و در امواج پهلو N322 است.

کلیدواژه‌ها


عنوان مقاله [English]

Numerical simulation of submarine motions in three degrees of freedom in irregular waves for drag force estimation

نویسندگان [English]

  • saleh Amini 1
  • Mahmoud Rostami Varnousfaaderani 2
  • Mojtaba Dehghan Manshadi 3
  • Hosein Norouzi 4
1 PhD student، Isfahan Malik Ashtar University of Technology ، Isfahan، Iran
2 Assistant Professor, Isfahan Malek Ashtar University of Technology, Isfahan, Iran
3 Professor, Isfahan Malek Ashtar University of Technology, Isfahan, Iran
4 PhD, Isfahan Malek Ashtar University of Technology, Isfahan, Iran
چکیده [English]

In this paper, the simulation of submarine motion near the free surface of water exposed to irregular waves has been done. In this article, URANS method with overset grid approach and volume fraction of fluid method have been used to simulate the free surface of water in Star CCM software. The geometry studied in this simulation is the Sobuff submarine model with fully appendages. Since the freedom of motion of the submarine can have a significant effect on the results of the drag force, the simulations are performed in the case that the submarine is free in the three directions of heave, pitch and roll, and the drag force has been calculated. Also, the effect of different encounter angles and characteristics of waves on the drag force has been investigated. The results show that with the increase in the range of pitch motions due to the increase in the height of the wave, the drag force also increases. In addition, in following waves, the fluctuation of the drag force is minimal, and the maximum value of the calculated drag force is in head waves. In waves with a characteristic height of 0.43 meters, the maximum drag force in head waves is 444 N and in beam waves is 322 N. The results show that with the increase in the significant height of the waves, the drag force also increases.
 

کلیدواژه‌ها [English]

  • Suboff Submarine
  • drag force
  • three degrees of freedom
  • irregular waves

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https://creativecommons.org/licenses/by/4.0/

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