CAJ | 학술논문

为进一步了解高寒地区铁路沿线针对西部强风设置的铁路风屏障，本文以空气动力学原理及气固两相流理论为基础，采用C FD数值模拟技术对铁路风屏障的气动绕流现象及风吹雪特性进行研究。分别考察不同透孔率条件下不同类型风屏障对线上车辆气动绕流特性的影响，并以透孔率30％轻型风屏障为代表研究不同风屏障高度、设置位置，不同来流风速及雪粒子粒径下的风屏障风吹雪特性。研究结果表明：透孔率30％轻型风屏障的设置对列车气动力改善效果最优；高度4.5 m、距线路4 m、透孔率30％轻型屏障引起的后方风吹雪灾害相对最小，来流风速及雪粒子粒径分别对线路附近区域积雪厚度有不同程度影响。
위진일보료해고한지구철로연선침대서부강풍설치적철로풍병장，본문이공기동역학원리급기고량상류이론위기출，채용C FD수치모의기술대철로풍병장적기동요류현상급풍취설특성진행연구。분별고찰불동투공솔조건하불동류형풍병장대선상차량기동요류특성적영향，병이투공솔30％경형풍병장위대표연구불동풍병장고도、설치위치，불동래류풍속급설입자립경하적풍병장풍취설특성。연구결과표명：투공솔30％경형풍병장적설치대열차기동력개선효과최우；고도4.5 m、거선로4 m、투공솔30％경형병장인기적후방풍취설재해상대최소，래류풍속급설입자립경분별대선로부근구역적설후도유불동정도영향。
To further understand the wind screens established along the railway line in the frigid plateau region against the strong west wind ,based on aerodynamic principle and gas‐solid two‐phase flow theory ,this paper presented an analysis on the aerodynamic ambient flow of railway wind screens and drifting snow features caused by wind screens , using CFD numerical simulation technology . The impacts of various types of wind screens under different through‐hole rates on the aerodynamic ambient flow of on‐line vehicles were investiga‐ted , and the light wind screen with 30% through‐hole rate was chosen as a typical case to study drifting snow features around wind screens with diversified incoming flow speeds , wind screen heights , wind screen loca‐tions and snow grain sizes . The results showed that the light wind screen with 30% through‐hole rate can pro‐vide optimal improvement to aerodynamic force of the train .Wind screens with a height of 4.5 m ,a distance of 4 m from the railway line and with 30% through‐hole rate may reduce the drifting snow disaster to the rela‐tively minimum extent . Snow grain sizes and incoming flow speeds separately had different degrees of effects on snow cover thickness near the line .