| 椭圆截面形状大回转消防水炮炮管内流数值模拟 |
| |
| 引用本文： | 徐捷,袁寿其,薛林,向清江.椭圆截面形状大回转消防水炮炮管内流数值模拟[J].排灌机械工程学报,2022,40(4):391-397. |
| |
| 作者姓名： | 徐捷 袁寿其 薛林 向清江 |
| |
| 作者单位： | 1. 江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013; 2. 应急管理部上海消防研究所, 上海 200032 |
| |
| 摘 要： | 以大回转型大流量消防水炮炮管为研究对象,对3种流量工况下圆截面和不同离心率椭圆截面消防水炮炮管内三维定常流动进行数值计算,分析不同截面炮管内流体水力损失和出口流态,得到截面变化对消防水炮炮管内部流动的影响规律,结果表明:在3种流量工况下,圆截面炮管与非圆截面炮管水力损失Δp差异较小,变化范围在2.7%以内;出口湍动能随...
|
| 关 键 词： | 消防水炮炮管 弯管 截面形状 数值模拟 水力性能 |
| 收稿时间： | 2020-05-05 |
Numerical simulation of internal flow in a large-turning fire water cannon barrel with elliptical cross-sectional shapes |
| |
| XU Jie,YUAN Shouqi,XUE Lin,XIANG Qingjiang.Numerical simulation of internal flow in a large-turning fire water cannon barrel with elliptical cross-sectional shapes[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(4):391-397. |
| |
| Authors: | XU Jie YUAN Shouqi XUE Lin XIANG Qingjiang |
| |
| Institution: | 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Shanghai Fire Research Institute of Ministry of Public Security(MPS), Shanghai 200032, China |
| |
| Abstract: | Taking the large rotation and large flow fire water cannon barrel as the research object, the computational fluid dynamics software FLUENT was used to numerically calculate the three dimensional steady flow in the fire water cannon barrel with circular cross section and elliptical cross section under three flow conditions. By analyzing the hydraulic loss of the fluid in the barrel of different cross sections and the flow pattern of the outlet, the influence rule of the cross section change on the internal flow of the fire water cannon barrel was obtained. The results show that under the three flow conditions, the hydraulic force of the round cross section barrel and the non circular cross section barrel is hydraulic. The loss difference is small, and the variation range is within 2.7%; the turbulent kinetic energy of the outlet increases with the increase of the elliptical eccentricity of the barrel section, and gradually deviates from the center axis of the pipe; at the exit of the round barrel and non circular barrel, the positive and negative vortices offset the reduction of vortex flux, the streamline density of the outlet of the round cross section barrel and the outlet of the vertical ellipse cross section barrel is more uniform than that of the horizontal ellipse cross section barrel, and the vertical ellipse cross section barrel with the same eccentricity is 21% lower than the average exit velocity deviation of the transverse elliptical barrel. |
| |
| Keywords: | fire water cannon barrel elbow cross sectional shape numerical simulation hydraulic performan |
|
| 点击此处可从《排灌机械工程学报》浏览原始摘要信息 |
| 点击此处可从《排灌机械工程学报》下载免费的PDF全文 |
|
