火电厂输灰管路浆体水击瞬变过程数值计算与分析  

Analysis and numerical calculation of slurry water-hammer transient process on ashtransportation pipeline in thermal power plant

作　　者：周云龙[1] 陈晓波[1] 邓冬[1] 孙斌[1] 洪文鹏[1] 

机构地区：[1]东北电力大学能源与机械工程学院,吉林省吉林市132012

出　　处：《吉林大学学报（工学版）》2008年第3期652-657,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50676017)

摘　　要：水力输灰在火电厂中获得越来越广泛的应用。在浆体水击瞬变过程基本方程的基础上,运用特征线方法建立了考虑含气量的伪均质浆体停泵水击瞬变过程数学模型。对某火电厂输灰复合管道计算了当水泵发生事故停泵时,水泵出口压力相对值,泵的无因次流量,泵的无因次转速,管道顶端最高点处的压力水头相对值的瞬变过程。通过对数值计算结果的分析,提出了在管道顶端最高点设置调压井和增大电机飞轮力矩的方法来降低管道中浆体水击的危害。The hydraulic ash transportation gaius increasingly wide application in thermal power plant. On the basis of the fundamental equations of the sturry water-hammer transient process, a mathematical model for the process of the pseudo-homogeneous air-entrained slurry water-hanvmer at the pump stopping was proposed using the characteristic line method. The transcent processes of the relative water pump outlet pressure, the dimensionless pump flow rate, the dimensionless pump rotational speed, the relative pressure head at the highest point of the pipeline were calculated by the model for the compound ash transportation pipeline in a certain thermal power plant. Based on the numerical calculation and the analysis of the calculated results, a solution to alleviate the harm of the slurry water-hammer in the pipeline was proposed, i. e. ,installing a surge tank at the highest point of the pipeline and increasing the moment of inertia of the water pump motor.

关 键 词：流体力学 火电厂 输灰管路 瞬变流 浆体水击 

分 类 号：O359.1[理学—流体力学]