CAJ | 학술논문

对运行状态下的某超大型双曲冷却塔的内表面平均风压进行了 CFD 数值模拟。在计算流体动力学软件基础上进行二次开发，采用 DPM模型结合 UDF 函数方法加入源项来研究某超大型冷却塔内表面平均风压分布；塔中水相采用了拉格朗日方法模拟，而空气相采用欧拉方法模拟，较好地实现了冷却塔运行状态下的内外流场计算及其与传热传质的耦合计算，分析了运行状态下冷却塔横风向来流时的内压分布规律。无侧风工况下计算结果显示，塔运行过程中的内表面压力对称性良好，出水温度与实测结果相符，验证了本文提出的塔运行过程中的传热传质计算方法的正确性。侧风工况下得到塔内压力系数沿高度方向相应变大，而沿纬向变化不明显。同时讨论了中国规范对内表面压力系数的取值不完善之处，给出了建议取值，为超大型冷却塔设计过程中的内压计算提供方法和依据。
대운행상태하적모초대형쌍곡냉각탑적내표면평균풍압진행료 CFD 수치모의。재계산류체동역학연건기출상진행이차개발，채용 DPM모형결합 UDF 함수방법가입원항래연구모초대형냉각탑내표면평균풍압분포；탑중수상채용료랍격랑일방법모의，이공기상채용구랍방법모의，교호지실현료냉각탑운행상태하적내외류장계산급기여전열전질적우합계산，분석료운행상태하냉각탑횡풍향래류시적내압분포규률。무측풍공황하계산결과현시，탑운행과정중적내표면압력대칭성량호，출수온도여실측결과상부，험증료본문제출적탑운행과정중적전열전질계산방법적정학성。측풍공황하득도탑내압력계수연고도방향상응변대，이연위향변화불명현。동시토론료중국규범대내표면압력계수적취치불완선지처，급출료건의취치，위초대형냉각탑설계과정중적내압계산제공방법화의거。
The average wind pressure on the internal surface of a super large hyperbolic cooling tower under the operating conditions was simulated in CFD method.Based on computational fluid dynamics soft-ware for secondary development,DPM model combined with a UDF function method was used to study the average wind pressure on the internal surface of a super large cooling tower.The Lagrangian method was used to simulate the water phase of the tower and Euler method was adopted to simulate the air phase,the coupling calculation between inner flow field and transformation of heat and mass in cooling tower under the operating conditions was well realized,and the internal pressure distribution law of cooling tower un-der crosswind direction with running state was analyzed.The results of the tower with no cross wind show that the symmetry of the average pressure on the internal surface goes well,and the water temperature is consistent with the test result,which verifies the effectiveness of the method proposed.The value of the average pressure coefficient of the internal surface of cooling tower under cross wind becomes bigger along the height direction,and the value does not change significantly along the latitudinal direction.The short-comings of the current code about internal surface pressure coefficient were discussed,and the recommen-ded values were given,which provides methods and basis for the calculation of the internal pressure of su-per large cooling tower design.