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  本文關(guān)鍵詞：溫排水變態(tài)模型的水平擴散相似問題　出處：《水利學報》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 擴散相似 水平擴散系數(shù) 模型變態(tài)率

【摘要】：溫排水變態(tài)模型擴散系數(shù)與模型變率之間存在著密切聯(lián)系,了解、明確溫排水變態(tài)模型的擴散相似影響,對溫排水試驗模型設(shè)計、幾何變態(tài)率選擇以及提高模型模擬精度具有重要意義。本文總結(jié)分析了前人關(guān)于污染物水平擴散系數(shù)計算方法以及擴散相似問題等相關(guān)研究成果,據(jù)此提出了寬淺型水域污染物水平擴散系數(shù)通用計算模式。在此基礎(chǔ)上,基于可控溫、濕度條件下溫排水輸移擴散水槽試驗與數(shù)學模型反演計算分析相結(jié)合的方法,開展了散熱相似條件下不同變態(tài)率模型溫排水輸移擴散影響對比研究,對不同變率條件下流場、溫度場主要特征參數(shù)及水平擴散項參數(shù)取值進行了深入的分析,提出了寬淺型水域變態(tài)模型水平擴散系數(shù)與模型變率間的計算關(guān)系式。經(jīng)原型實測資料驗證,該關(guān)系式在寬淺水域具有良好的適宜性,可用于溫排水及其它污染物輸移擴散變態(tài)模型與原型間水平擴散系數(shù)的轉(zhuǎn)換計算。研究結(jié)果為今后寬淺型水域中溫排水或其他污染物輸移擴散數(shù)模計算、物理模型試驗參數(shù)選擇奠定了良好的基礎(chǔ)。
[Abstract]:There is a close relationship between the diffusion coefficient and the model variability of the thermal drainage metamorphosis model. It is understood that the diffusion similarity effect of the temperature drainage metamorphosis model is clear, and the design of the temperature drainage test model is made clear. It is of great significance to select geometric distortion rate and improve the accuracy of model simulation. This paper summarizes and analyzes the previous research results on the calculation method of horizontal diffusion coefficient of pollutants and diffusion similarity. Based on this, a general calculation model of horizontal diffusion coefficient of pollutants in wide and shallow water area is proposed, and based on this model, the temperature can be controlled. A comparative study on the influence of temperature drainage transfer and diffusion under the condition of similar heat dissipation rate was carried out by combining the experiments of temperature drainage transfer and diffusion flume with mathematical model inversion calculation and analysis under the condition of humidity. The main characteristic parameters and horizontal diffusion parameters of the flow field and the temperature field under different variable rates are analyzed in depth. The relationship between horizontal diffusion coefficient and model variability of wide and shallow water metamorphosis model is proposed. The experimental data of prototype show that the relationship is suitable for wide shallow water area. It can be used to calculate the horizontal diffusion coefficient between the model of temperature drainage and other pollutant transport and diffusion metamorphosis and the model of horizontal diffusion coefficient between the prototype. The result is the numerical model calculation of temperature drainage or other pollutant transport and diffusion in wide shallow water in the future. The selection of physical model test parameters has laid a good foundation.
【作者單位】： 中國水利水電科學研究院;
【基金】：國家自然科學基金項目(51209228) CAP1400安全審評關(guān)鍵技術(shù)研究國家科技重大專項(2013ZX06002001)
【分類號】：X52;X143
【正文快照】： 1研究背景物理模型試驗是溫排水輸移擴散影響研究的重要手段之一,其主要優(yōu)點是可以更加直觀、準確地反映排放口近區(qū)溫排水摻混、稀釋特性。然而,對于需反映取排水工程水域溫排水整體輸運規(guī)律的試驗模型,囿于試驗室場地與模擬范圍間所存在的矛盾,一般需采用水平比尺與水深比尺

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本文編號：1364465