CAJ | 학술논문

基于三维非定常可压缩雷诺时均 N-S方程和RNG κ-ε双方程湍流模型，采用滑移网格技术，对峡谷风作用下8车编组的高速列车进出隧道气动性能进行模拟，并对沿线风速进行监测。研究表明：列车平地上非定常数值计算所得气动力系数均方根与风洞试验结果规律一致，两者吻合较好。由于受狭道效应和峡谷中地形地貌的共同作用影响，桥上各监测点的风速呈非对称分布。列车从隧道中驶入峡谷风区和从风区驶入隧道中两过程，列车气动力系数变化有明显差别。列车在峡谷风区高速行驶过程中，列车气动力及力矩系数会因受到以峡谷风为主的地形风影响而出现明显波动，其中尾车侧向力系数和头车升力系数受影响变化最大，分别为67％和216％。
기우삼유비정상가압축뢰낙시균 N-S방정화RNG κ-ε쌍방정단류모형，채용활이망격기술，대협곡풍작용하8차편조적고속열차진출수도기동성능진행모의，병대연선풍속진행감측。연구표명：열차평지상비정상수치계산소득기동력계수균방근여풍동시험결과규률일치，량자문합교호。유우수협도효응화협곡중지형지모적공동작용영향，교상각감측점적풍속정비대칭분포。열차종수도중사입협곡풍구화종풍구사입수도중량과정，열차기동력계수변화유명현차별。열차재협곡풍구고속행사과정중，열차기동력급력구계수회인수도이협곡풍위주적지형풍영향이출현명현파동，기중미차측향력계수화두차승력계수수영향변화최대，분별위67％화216％。
On the basis of the three-dimensional unsteady compressible Reynolds-averaged N-S equation and the RNG κ-εequation turbulence model , the aerodynamic performance of the 8-vehicle high-speed train running in-to-out of a tunnel under canyon winds was simutaled ,and the wind velocities along the railway line were moni-tored . The computational results show as follows :The numerical simulation results are consistent with those of wind tunnel tests ;due to the influence of narrow passage effect and valley terrain , the wind velocity distri-bution on a bridge is asymmetric ;the difference between aerodynamic force changes of the train entering into the canyon and those of the train running out of the canyon is significant ;as the train is running at a high-speed on the railway line in the canyon wind zone , the aerodynamic forces and moment coefficents of the train are fluctua-ted obviously due to the gorge wind ;out of the fluctuated changes , the changes of the tail vehicle lateral force coeffi-cient and the head vehicle lift force coefficient are the largest , reaching 67% and 216% respectively .