کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6757101 | 1431092 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on the effect of wind angles on pressure distribution of train streamlined zone and train aerodynamic forces
ترجمه فارسی عنوان
بررسی تجربی بر روی تاثیر زاویه های باد بر توزیع فشار در ناحیه روکش شده و نیروی آیرودینامیکی قطار
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کلمات کلیدی
تونل باد، قطار سریع السیر، زاویه باد، ضریب فشار، نیروهای آیرودینامیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The influences of wind angles on the behavior of a high-speed train were investigated using a scaled-down wind tunnel model (1:8 scale) at the wind angles of 0°, 5.14°, 10.2°, 15.11°, and 19.8°. Based on the experimental results elicited at different Reynolds numbers (9.44â¯Ãâ¯105, 1.26â¯Ãâ¯106, 1.57â¯Ãâ¯106, and 1.89â¯Ãâ¯106, corresponding to the wind speeds of 30â¯m/s, 40â¯m/s, 50â¯m/s, and 60â¯m/s, respectively), the speed of 60â¯m/s was determined as optimal for wind tunnel tests. The effects of the incoming flow angles on the pressure distribution of the train's streamlined zone and the aerodynamic forces of the train were analyzed. Results show that the pressure coefficients on the leeward side and the symmetrical plane profile curve of the streamlined zone decreased as the wind angle increased. However, the change in the windward side was opposite to that of the leeward side. The lateral and the absolute value of the lift forces increased rapidly as a function of the wind angle, while the drag force was maximized when the wind angle was 15.11°, followed by subsequent decreases at increasing wind angles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 174, March 2018, Pages 330-343
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 174, March 2018, Pages 330-343
نویسندگان
Lei Zhang, Ming-zhi Yang, Xi-feng Liang,