【摘要】：在現(xiàn)代工業(yè)生產(chǎn)中，諸多加工工藝都可能產(chǎn)生高溫浮射流，這部分高溫浮射流中伴生有大量余熱、有害煙氣及粉塵顆粒，這些有害物質(zhì)的逃逸直接影響室內(nèi)空氣質(zhì)量，并對(duì)操作者的身心健康帶來(lái)嚴(yán)重的危害，很多企業(yè)中即使室內(nèi)存在排風(fēng)罩的抽吸作用，，這部分有害煙氣及粉塵顆粒依然沒(méi)有得到有效的控制。 為改善工業(yè)生產(chǎn)環(huán)境并提高粉塵捕集效率，本在總結(jié)國(guó)內(nèi)外浮力羽流研究現(xiàn)狀的基礎(chǔ)上，結(jié)合現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)、數(shù)值模計(jì)算以及理論分析確定合理、準(zhǔn)確的邊界條件及物理模型，在密度、比熱等與溫度相關(guān)物性線(xiàn)性差分進(jìn)行合理設(shè)置，保證數(shù)值模擬計(jì)算結(jié)果的準(zhǔn)確性。 分別對(duì)非受限工況下水平圓面出口、傾斜圓面出口及受限工況下傾斜圓面出口三種工況，在不同初始速度、初始溫度及初始速度方向的影響因素下針對(duì)浮射流流場(chǎng)特性進(jìn)行分析研究，并得出高溫浮射流在各種影響因素下的流場(chǎng)特性，同時(shí)為排風(fēng)罩的安置位置提供參考依據(jù)。 利用DPM離散軌道模型對(duì)非受限工況下傾斜圓面出口及受限工況下傾斜圓面出口高溫浮射流中粉塵粒子進(jìn)行兩相流數(shù)值模擬計(jì)算，采用離散相與連續(xù)相單項(xiàng)耦合的方法，在排風(fēng)罩高度及排風(fēng)量大小不變的條件下得到不同排風(fēng)罩尺寸及位置下的粉塵捕集效率，最后通過(guò)比較不同排風(fēng)罩尺寸及位置下的粉塵捕集效率得到最佳的通風(fēng)方案。經(jīng)過(guò)分析研究后所總結(jié)出的結(jié)論為高溫浮射流伴生粉塵通風(fēng)設(shè)計(jì)提供相關(guān)的設(shè)計(jì)參考依據(jù)。
[Abstract]:In modern industrial production, many processing processes may produce high temperature floating jet, which is accompanied by a large amount of residual heat, harmful smoke and dust particles. The escape of these harmful substances has a direct impact on indoor air quality. And it brings serious harm to the operator's physical and mental health. Even if there is the suction effect of exhaust hood in many enterprises, this part of harmful smoke and dust particles are still not effectively controlled. In order to improve the industrial production environment and improve the dust capture efficiency, based on the summarization of the present situation of buoyancy plume research at home and abroad, the reasonable and accurate boundary conditions and physical models are determined by combining the field measured data, numerical model calculation and theoretical analysis. In order to ensure the accuracy of the numerical simulation results, the linear difference between density, specific heat and temperature related physical properties is reasonably set up. At different initial velocities, the horizontal circular outlet, the inclined circular outlet and the inclined circular outlet under the condition of non-restricted working conditions are obtained, respectively. Under the influence factors of initial temperature and initial velocity direction, the characteristics of floating jet flow field are analyzed and studied, and the flow field characteristics of high temperature floating jet under various influence factors are obtained, and the reference basis for the placement of exhaust hood is provided at the same time. The DPM discrete orbit model is used to simulate the two-phase flow of dust particles in the high-temperature floating jet at the exit of the inclined circular surface under the unconfined working condition and the exit of the inclined circular plane under the restricted condition. The discrete phase and continuous phase single coupling method is used. The dust capture efficiency of different exhaust hood sizes and positions is obtained under the condition of constant exhaust hood height and exhaust air volume. Finally, the best ventilation scheme is obtained by comparing the dust capture efficiency under different exhaust hood sizes and positions. The conclusion can be used as reference for the design of dust ventilation associated with high temperature floating jet.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：X962;X701.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 徐進(jìn),葛滿(mǎn)初;氣固兩相流動(dòng)的數(shù)值計(jì)算[J];工程熱物理學(xué)報(bào);1998年02期

2 譚良才,張旭,沙高原;大空間中強(qiáng)熱源誘導(dǎo)含塵氣流控制模型實(shí)驗(yàn)研究[J];通風(fēng)除塵;1997年02期

3 高軍,高甫生,趙加寧;采用“二區(qū)+CFD”模型研究點(diǎn)源自然通風(fēng)及其羽流[J];暖通空調(diào);2005年01期

4 李安桂;空氣射流、浮力尾流和浮力射流的統(tǒng)一性[J];暖通空調(diào);1998年05期

5 沙高原,張旭,譚良才;CO_2摸擬開(kāi)敞大空間中瞬態(tài)含塵氣流的實(shí)驗(yàn)研究[J];通風(fēng)除塵;1997年01期

6 譚良才,張旭;大空間浮射流流動(dòng)規(guī)律的數(shù)值分析及實(shí)驗(yàn)驗(yàn)證[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);1998年06期

7 簡(jiǎn)瑞民,張旭,沙高原;強(qiáng)熱源誘導(dǎo)含塵浮射流的濃度示蹤及捕集效率[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年06期

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