摘要
研究了水平旋转内消能泄水道空腔环流特有的能动量特性.试验观测与分析结果表明:在水平洞的起始段,空腔环流的环向动能沿程急剧减小,进而转化为各占一定比例的环向与轴向动能,并伴随着大量的能量损失;环向的能动量在起始段较大,但在中间段与轴向的能动量比值已接近1,沿程的变化也较小;环向的动能与压能沿程变化相反并互相对应;环向的能量沿程变化规律决定了总能量的沿程变化规律;能量损失与常规的明流或有压泄水道相比大大增加,能量损失机理更为复杂.
The special characteristics of kinetic energy and momentum of horizontal rotary cavity flow in internal dissipating tunnel with an inlet shaft are analyzed. The results indicate that the circulating flow kinetic energy reduces tempestuously with larger energy loss in the initial tunnel and varies gradually in a proportion to the axial flow kinetic energy along the tunnel, the circulating flow kinetic energy and momentum in the initial tunnel is larger but the ratio to the axial flow kinetic energy and momentum approaches 1:1 in the middle tunnel with less change, and the change of circulating flow kinetic energy and momentum is contrary to the change of the axial flow kinetic energy and momentum. The transformation law of circulating flow energy determines the change of total energy along the tunnel, the energy loss greatly increases compared with general free or pressured discharge tunnel, and the energy loss mechanism behaves more complicatedly.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2004年第7期741-745,共5页
Journal of Xi'an Jiaotong University
