کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4924945 | 1431109 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on the effect of Reynolds number on aerodynamic performance of high-speed train with and without yaw angle
ترجمه فارسی عنوان
بررسی تجربی بر اثر تعداد رینولدز بر عملکرد آیرودینامیکی قطار سرعت بالا با و بدون زاویه نشت
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کلمات کلیدی
قطارهای سرعت بالا، آیرودینامیک، تونل باد، اثر شماره رینولدز، زاویه یوغ،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The influence of the Reynolds number on the aerodynamic force and pressure of a train was investigated experimentally at yaw angles of 0° and 15°. Two kinds trains were scaled at 1:8 and 1:20, respectively, and the Reynolds number, based on the train height, ranged from 3.02Ã105 to 2.27Ã106. The pressure distribution along a train at yaw angles of 0° and 15° was researched, and the results are compared herein. The difference in Reynolds number effect between the head and tail cars is also discussed. The results show that the lift coefficient of a train increases with an increase in Reynolds number at a yaw angle of 15°, and the other force coefficients decrease with an increase in Reynolds number. There are significant differences between the positive and negative pressures in terms of the Reynolds number effect. The yaw angle weakens the Reynolds number effect on the pressure coefficient on the head car, whereas the influence of the yaw angle on the Reynolds number effect on the pressure coefficient for the tail car is relatively complex.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 157, October 2016, Pages 36-46
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 157, October 2016, Pages 36-46
نویسندگان
Jiqiang Niu, Xifeng Liang, Dan Zhou,