Author(s): Jingjing Zhai, Qingyuan Yang, Tao Zhu
Linked Author(s): Jingjing Zhai
Keywords: Stilling well, impact pressure, distance between pipe outlet and well bottom
Abstract:
Stilling well is usually used for the energy dissipation of pipe flows with high head and low discharge. Many studies focus on the empirical formula of the well scale and flow rate, and few are about the flow field and pressure properties in the well. Without the pressure distribution, it is hard to analyze the safety of the well when it is functioning. In this paper, a physical model is proposed to investigate the properties of pressure acting on the bottom of the stilling well. The runs of the experiment were with different flow rates and outlet distances. Quantitative relationships among pressure parameters, flow rate and outlet distance were established. The study show that the pressure acting on the bottom decreases nonlinearly as the distance L rise at same flow rate. When the ᇞ equals to 0.5D (D, diameter of the pipe), the pressure is much larger than that with 1.0D. When the distance changes to 1.5D (and above), the pressure decreases a little compared to that with 1.0D. (2624, 61, 306)
Year: 2017