Determining the Coefficient of Discharge for a Draining Container
Determining the Coefficient of Discharge for a Draining Container
复制标题
确定排水容器的排放系数
DOI：
10.1119/1.4849155
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
W. Slaton
中科院分区：
文献类型：
--
作者：
Ashley J. Hicks;W. Slaton
流体通过开放容器的流动是物理入门课程中经常研究的主题。流体力学课程深入研究流体流过带有孔或障碍物的开放容器的主题。由于称为收缩腔的流体流动现象，从锐边孔口流出的流体射流很少具有与孔口相同的面积。从孔口喷出的流体面积与孔口的实际面积通过称为流量系数 Cd 的值相关。本文的目的是开发一个排水开放容器的数学模型和一种实验方法，以有效确定此类系统的排水系数。物理教育文献中的先前工作已经开发了一种使用超声波运动探测器来测量从孔口流出的流体流量的方法。在本文中，我们提供的数据表明我们的方法可用于查找锐边预期文献值内的流量系数......
The flow of fluids through open containers is a topic studied frequently in introductory physics classes. A fluid mechanics class delves deeper into the topic of fluid flow through open containers with holes or barriers. The flow of a fluid jet out of a sharp-edged orifice rarely has the same area as the orifice due to a fluid flow phenomenon known as the vena contracta. The area of a fluid jet out of an orifice is related to the actual area of the orifice by a value known as the coefficient of discharge, Cd. The purpose of this paper is to develop a mathematical model for a draining open container and an experimental method that will efficiently determine the coefficient of discharge for such a system. Prior work in physics education literature has developed a method for measuring the flow of a fluid out of an orifice using ultrasonic motion detectors. In this paper we present data that show our method can be used to find the coefficient of discharge within the expected literature values for sharp-edged ...