کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8865060 1620650 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Drag reduction of a rapid vehicle in supercavitating flow
ترجمه فارسی عنوان
کاهش سرعت یک وسیله نقلیه سریع در جریان سوپرکابایتی
کلمات کلیدی
کاهش کشیدن، شبیه سازی عددی، سوپرکاباسیون، وسیله نقلیه زیر آب، مدل آشفته جریان چند مرحلهای، اژدر با سرعت بالا، وسیله نقلیه فوق العاده ای دینامیک سیالات محاسباتی، شماره کاویتاسیون،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
Supercavitation is one of the most attractive technologies to achieve high speed for underwater vehicles. However, the multiphase flow with high-speed around the supercavitating vehicle (SCV) is difficult to simulate accurately. In this paper, we use modified the turbulent viscosity formula in the Standard K-Epsilon (SKE) turbulent model to simulate the supercavitating flow. The numerical results of flow over several typical cavitators are in agreement with the experimental data and theoretical prediction. In the last part, a flying SCV was studied by unsteady numerical simulation. The selected computation setup corresponds to an outdoor supercavitating experiment. Only very limited experimental data was recorded due to the difficulties under the circumstance of high-speed underwater condition. However, the numerical simulation recovers the whole scenario, the results are qualitatively reasonable by comparing to the experimental observations. The drag reduction capacity of supercavitation is evaluated by comparing with a moving vehicle launching at the same speed but without supercavitation. The results show that the supercavitation reduces the drag of the vehicle dramatically.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Naval Architecture and Ocean Engineering - Volume 9, Issue 1, January 2017, Pages 35-44
نویسندگان
, , ,