【摘要】：當(dāng)今世界資源形勢(shì)日益緊張，水力發(fā)電空前發(fā)展，國(guó)內(nèi)外修建了大量的抽水蓄能電站。但是此類(lèi)電站地下廠房的設(shè)備層及母線洞機(jī)電設(shè)備布置復(fù)雜、散熱不均，國(guó)內(nèi)外相關(guān)的氣流組織研究較少。在水電站地下廠房空調(diào)通風(fēng)設(shè)計(jì)中，這些設(shè)備層之間的通風(fēng)往往采用夾墻機(jī)械通風(fēng)的方式，母線洞洞尾排風(fēng)。本文以相似理論為依據(jù)，以阿基米德數(shù)Ar為相似準(zhǔn)則數(shù)，參照國(guó)內(nèi)外地下電站的通風(fēng)模型試驗(yàn)及李安桂教授課題組歷年來(lái)利用激光測(cè)速2DPIV技術(shù)對(duì)水電站通風(fēng)氣流組織縮尺模型的研究經(jīng)驗(yàn)，建立比例為1∶50的幾何模型，，并對(duì)廠房的通風(fēng)氣流組織進(jìn)行了2DPIV試驗(yàn)研究和分析。 試驗(yàn)過(guò)程中分別采用了三種不同的送風(fēng)速度：V/V0=0.75、 V/V0=1和V/V0=1.25（其中V0是模型設(shè)計(jì)送風(fēng)速度）和三種不同的熱源強(qiáng)度：Q/Q0=0.75、Q/Q0=1和Q/Q0=1.25（其中Q0是模型設(shè)計(jì)發(fā)熱量）試驗(yàn)首先對(duì)主廠房?jī)?nèi)中間層、水輪機(jī)層、蝸殼層等設(shè)備層及母線洞工作區(qū)溫度場(chǎng)進(jìn)行了測(cè)定，研究了在不同送風(fēng)速度、不同熱源強(qiáng)度下夾墻機(jī)械通風(fēng)對(duì)各層及機(jī)械排風(fēng)對(duì)母線洞工作區(qū)溫度場(chǎng)的影響；采用2DPIV對(duì)母線洞的速度場(chǎng)進(jìn)行了研究，探究不同送風(fēng)速度、不同熱源強(qiáng)度下機(jī)械排風(fēng)對(duì)母線洞速度場(chǎng)的影響。本研究對(duì)水電站地下主廠房空調(diào)通風(fēng)設(shè)計(jì)提供了參考依據(jù)。
[Abstract]:Nowadays, with the increasing shortage of resources and the unprecedented development of hydropower generation, a large number of pumped storage power stations have been built at home and abroad. However, the equipment layer and bus tunnel of this kind of underground powerhouse have complicated arrangement and uneven heat dissipation, and there are few researches on the airflow organization at home and abroad. In the air conditioning and ventilation design of underground powerhouse of hydropower station, the ventilation between these equipment floors is usually carried out by mechanical ventilation with wall, and the exhaust air at the end of the bus tunnel is used. Based on the similarity theory, this paper takes the Archimedes number Ar as the similarity criterion number. Referring to the ventilation model tests of underground power stations at home and abroad and the research experience of Professor Li Angui's research group on the scaling model of ventilation airflow organization of hydropower stations by using laser velocimetry 2DPIV technology over the years, a geometric model with a scale of 1:50 is established. The ventilation airflow distribution of the workshop was studied and analyzed by 2DPIV test. During the experiment, three different air supply speeds were used: v / V _ 0 0.75, V/V0=1 and V/V0=1.25 (where V _ 0 is the model designed air supply velocity) and three different heat source intensities: Q / Q _ 0 0.75, Q/Q0=1 and Q/Q0=1.25 (where Q0 is the calorific value of model design) the temperature field of the equipment layer in the main building, the turbine layer, the volute layer, and the working area of the busbar tunnel are measured at first, and the velocity of air supply is studied. The influence of mechanical ventilation on the temperature field of the busbar tunnel working area under different heat source intensity; The velocity field of busbar tunnel is studied by 2DPIV, and the influence of mechanical exhaust air on the velocity field of busbar tunnel under different air velocity and heat source intensity is explored. This study provides a reference for the air-conditioning ventilation design of underground main powerhouse of hydropower station.
【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】：2014
【分類(lèi)號(hào)】：TV731.6;TV735

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