竖井进流水平旋转内消能泄水道的壁面压力分布规律

Wall pressure distribution of the horizontal vortex and inner energy dissipating tunnel with a inlet shaft

本文从竖井进流水平旋转内消能泄水道的基本流态出发 ,对该种泄水道中的轴向及环向空腔水流的流速分布提出假定 ,并利用边界条件确定其形式。根据旋转水流r方向的基本微分方程和自由涡流的假设建立了这种泄水道环向空腔水流的压力积分方程表达式 ,并据此定义了这种流动的壁面压力系数。依据试验观测资料对这种流动的壁面压力系数及其影响因素的变化规律进行了分析 ,并给出相应的经验公式 ,从而较圆满地解决这种流动壁面压力等水力参数的计算 。

In this paper, the hollow encircle flow's axial and encircle velocity distributions of the Horizontal Vortex and Inner Energy Dissipating Tunnel with a Inlet Shaft shown as Fig. 1. have been supposed and decided by describing its essential flow patterns and giving its flow boundary conditions. The pressure integral eguation has been educed from a basic r direction motion differential equation according to free vortex flow supposition about the flow, and then a pressure coefficient is difined accordingly. Base on the experimental date measured by the writer of this pater, the change law of the pressure coefficient as well as its influence facfors have been analgzed and the empiric equation have been formulated by which the hydrualic characteristics of the type′s tunnel such as wall pressure、axial velocity etc. could then be analyzed and Calculated staisfactorily. These analysis and conclusions in the paper will be a foundation and a reference for farther reasearchers and engineering designers interesting in the reasearch region.