排入横流的浮力污水的物理模拟

D. Malcangio, M. B. Meftah, M. Mossa
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引用次数: 5

摘要

本研究的重点是湍流垂直浮力射流的物理建模,这些射流被排放成横向流并与局部背景湍流相互作用。物理模型是在巴里技术大学海岸工程实验室开发的。物理模型由一个复杂的系统组成,该系统可以监测和调整通道流量(如流量、流深)和浮力射流(如流量、温度、盐度)的所有特征参数。正浮力射流和负浮力射流分别是通过在高于接收环境的温度和盐度下排放水来实现的。由于射流水动力现象的复杂性,需要使用一套精密的仪器来测量射流在横流中的扩散。平均射流稀释度由(i)四个不同的电阻温度检测器(RTD)测量,用于正浮力射流;(ii)一个高分辨率的微尺度电导率温度仪(MSCTI)测量,用于负浮力射流。然而,Nortek声学多普勒测速仪(ADV)系统用于测量现场流速,并使用CollectV软件进行数据采集和ExploreV软件进行数据分析。本文将对测量的标量场和矢量场进行说明,目的是强调一个良好的物理模型能够解释有环境因素(如横流和植被)的开放通道中浮力射流的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physical modelling of buoyant effluents discharged into a cross flow
This study focuses on physical modelling of turbulent vertical buoyant jets, discharged into a transversal current and interacting with localized background turbulence. The physical model was developed in the Coastal Engineering Laboratory of the Technical University of Bari. The physical model consists of a sophisticated system that allows to monitor and adjust all the characteristic parameters of both the channel flow (e.g. discharge, flow depth) and the buoyant jets (e.g. flow rate, temperature, salinity). Positively and negatively buoyant jets are realized by discharging water respectively at a temperature and salinity higher than that of the receiving environment. Due to the complexity of the jet-current hydrodynamic phenomena, a set of sophisticated instruments to measure the jet spreading within the cross flow is used. The average jet dilution is measured by (i) four different Resistance Temperature Detectors (RTD) for the positively buoyant jet, and (ii) a MicroScale Conductivity Temperature Instrument (MSCTI) of high resolution for the negatively buoyant jet. Whereas, a Nortek Acoustic Doppler Velocimeter (ADV) system is used to measure the field flow velocities, together with CollectV software for data acquisition and ExploreV software for data analysis. The measured scalar and vector fields will be illustrated in this paper, with the aim to emphasize that a well-set physical model is able to explain the behavior of buoyant jets in an open channel with ambient factors, such as cross flow and vegetation.
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