摘要
短管在水电站、泵站等引水、输水管系中普遍存在,采用特征线法计算有压管道系统瞬变流时,为了满足计算收敛和稳定性,计算时间步长受最短管的限制,导致计算耗时较长。采用集中惯性元件模型对管道刚性化处理,可以解决计算耗时的问题,但破坏了相邻节点求解的独立性,给管系中相关边界的处理带来麻烦。结合刚性模型求解在耗时上的经济性和弹性模型在边界模型处理时的方便性,构建了短管相容性求解模型。在不降低计算精度的情况下,使得刚性部分仍可采用弹性模型求解,有助于复杂管系求解模型的通用化和标准化,方便求解程序的编写与维护。
Short pipes commonly exist in the diversion pipe systems of hydropower stations, pumping stations, etc. To calculate the transient flow of this kind of pressure pipe network with the widely used method of characteristics, in order to meet the calculation convergence and stability, it may take a long CPU time because of the short time step limited by the shortest pipe. This problem can be well solved by the concentrated inertial element model. However, the independence of the boundaries on the two sides of short pipes is broken by this model. Some more complex compound boundaries become a new big problem need to be solved. In this paper, considering less time-consuming rigid model and easy boundary-solving with elastic model, a compatibility model to solve pipe network with short pipes had been built. Based on this model, the short pipes can also be dealt with by the elastic model with same time saving and calculation accuracy as the concentrated inertial element model. This model is also helpful to build a generalization and standardization model for complex pipe network solving, and make the program easy to compile and maintenance.
出处
《人民黄河》
CAS
北大核心
2013年第2期138-140,共3页
Yellow River
关键词
短管
管系
刚性模型
弹性模型
相容性
short pipe
pipe network
rigid model
elastic model
compatibility
