CAJ | 학술논문

对双曲冷却塔的平均风荷载进行CFD数值模拟,获得冷却塔内外表面的三维流场特性和各高度截面的平均风压系数分布曲线,并与以往文献的实测数据和风洞试验结果进行比较,以验证数值模拟的准确性.根据内外表面的风速矢量图,描述冷却塔内外流体的流动特征,发现旋涡的存在使风压分布趋于均匀的规律.并分析塔底的边缘效应及其对冷却塔内外表面风压的影响.讨论现行设计规范在外压的三维效应和内外压的共同作用等方面的不完善之处,给出部分改进建议和冷却塔外表面、内表面和内外表面压差的风压系数等压图,以供设计参考.
대쌍곡냉각탑적평균풍하재진행CFD수치모의,획득냉각탑내외표면적삼유류장특성화각고도절면적평균풍압계수분포곡선,병여이왕문헌적실측수거화풍동시험결과진행비교,이험증수치모의적준학성.근거내외표면적풍속시량도,묘술냉각탑내외류체적류동특정,발현선와적존재사풍압분포추우균균적규률.병분석탑저적변연효응급기대냉각탑내외표면풍압적영향.토론현행설계규범재외압적삼유효응화내외압적공동작용등방면적불완선지처,급출부분개진건의화냉각탑외표면、내표면화내외표면압차적풍압계수등압도,이공설계삼고.
CFD numerical simulation method is proposed to obtain the wind speed vector and pressure coefficient distribution at various heights of isolated large hyperbolic cooling tower. The agreement of CFD simulation result with former recorded data via full-scale measurement and wind-tunnel testing shows that the CFD simulation method is reasonable. Based on wind speed vector around tower, the characteristics of wind inside and outside of cooling tower is discussed, and the eddies tend to make the pressure evenly distributed are proposed. Again the boundary effect is mentioned. Some shortages and advices on Codes are proposed also.