کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7153581 | 1462486 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of multiple rings on side force over an ogive-cylinder body at subsonic speed
ترجمه فارسی عنوان
اثر چند حلقه بر نیروی جانبی بیش از یک بدن سیلندر با سرعت بالا
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کلمات کلیدی
گرداب نامتقارن، زاویه بالای حمله، گاو، نیروی جانبی، بدن بلند و باریک، بالابر گرداب،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی هوافضا
چکیده انگلیسی
Experiments and computations were performed over an ogive-cylinder body having an lift-to-drag ratio of 16 at a diameter Reynolds number of 29000. The side force on the slender body augments with increasing angles of attack for the case without a ring. This increase was mainly due to the increase in the asymmetry of the existing vortex pair in the wake of the body. Attempts were made to completely reduce the existing side force at the angle of attack ranging from 35° to 45°. Three rectangular cross-sectioned circumferential rings having a height of 3% of the local diameter were placed at axial distances of 2.5, 3.5 and 4.5 times the base diameter from the tip of the body so as to reduce the side force. The results obtained indicate that inclusion of three rings completely alleviated the side force on the slender body at the angle of attack ranging from 0° to 45°. The presence of rings was found to alter the growth of the vortices that helped in the reduction of the side force. Computations performed were in reasonable agreement with the experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Aeronautics - Volume 31, Issue 6, June 2018, Pages 1181-1188
Journal: Chinese Journal of Aeronautics - Volume 31, Issue 6, June 2018, Pages 1181-1188
نویسندگان
Priyank KUMAR, J.K. PRASAD,