摘要
管道系统的水力过渡过程通常是采用一维理论进行计算的,因此实际的三维道常采用沿中心线延伸变成具有相同过流断面的等效直管来代替。本文取90°时形弯管作为典型的三维单元,假设其中的流体为二维非粘性流体计算确定其水力过渡过程的特性。对于平面压力波在固定的弯管中传播以及弯管作阶跃形瞬态振动引起的压力波扰动进行了计算分析,绘制了弯管中流场的瞬变等压线,并研究分析了水对弯管的瞬态作用力。
In the present paper, hydraulictransients in a bend, a typical three-dimensional element, is calculated under the assumption of two-dimensional inviscid flow by applying MacCormack scheme. Results are shown for cases, in which a plane pressure wave propagates through a bend and a bend starts moving impulsively. Transients pressure fields and resulting hydraulic forces acting on the bend are demonstrated, discussed and compared with the corresponding results by one-dimensional calculation.
出处
《力学学报》
EI
CSCD
北大核心
1989年第5期548-554,共7页
Chinese Journal of Theoretical and Applied Mechanics
关键词
压力波
弯管
传播
水锤
bend, hydraulic transients, water-hammer
