CAJ | 학술논문

　　根据330 MW大型水–氢–氢冷汽轮发电机通风结构的特点，建立了半个轴向段电机的通风网络模型，采用流体网络方法计算得到电机运行时的总风量、各通风沟和进风室的风量和压力。为了验证流体网络方法计算的准确性，给出了端部区域内的流体与传热耦合三维数学模型，以流体网络计算出的压力和风速作为给定汽轮发电机端部求解域中的边界条件，采用有限体积法计算了铜屏蔽的温度分布，将耦合场计算结果与电机实测结果进行比较，误差满足工程要求。在此基础上，对电机端部区域内铜屏蔽和压圈之间的通风流道面积进行调整，在电机额定运行下，分析调整后铜屏蔽温度的变化，为大型汽轮发电机结构设计提供了可靠的依据。
　　근거330 MW대형수–경–경랭기륜발전궤통풍결구적특점，건립료반개축향단전궤적통풍망락모형，채용류체망락방법계산득도전궤운행시적총풍량、각통풍구화진풍실적풍량화압력。위료험증류체망락방법계산적준학성，급출료단부구역내적류체여전열우합삼유수학모형，이류체망락계산출적압력화풍속작위급정기륜발전궤단부구해역중적변계조건，채용유한체적법계산료동병폐적온도분포，장우합장계산결과여전궤실측결과진행비교，오차만족공정요구。재차기출상，대전궤단부구역내동병폐화압권지간적통풍류도면적진행조정，재전궤액정운행하，분석조정후동병폐온도적변화，위대형기륜발전궤결구설계제공료가고적의거。
According to the features of ventilation structure in 330 MW water-hydrogen-hydrogen cooled turbo-generator, the ventilation network model of half axial section was built, the total flow, the flow and the pressure of the ventilation ducts and the wind chambers were obtained with the fluid network method. To validate the accuracy of calculation with fluid network method, three-dimensional flow-heat transfer coupling model of end region was established. The flow velocity and the pressure from the ventilation system calculations were applied to the physical model of end region as boundary conditions, the distribution of the temperature on the copper shield was obtained with the finite volume method under rated operating conditions. Comparing the calculated temperature results with the test values, the errors meet the engineering requirement. Based on these, the change of temperature on the copper shield was analyzed by adjusting the flowing area of the ventilation duct between the copper shield and the press plate. All of the aforementioned will provide an effective basis for designing the structure of a large turbo-generator accurately.