本文選題：軸流換熱風(fēng)扇 + 風(fēng)管性能試驗(yàn)��； 參考：《上海交通大學(xué)》2014年碩士論文

【摘要】：與大型商場(chǎng)、車(chē)間和家用空調(diào)相比，由于換熱量不同，小型辦公場(chǎng)所配置的室外機(jī)軸流換熱風(fēng)扇需要專(zhuān)門(mén)設(shè)計(jì)。這一類(lèi)的換熱風(fēng)扇風(fēng)量要求在5300~6600m3/h，通常擺放在距工作生活區(qū)略遠(yuǎn)的室外位置，流量和全壓是其換熱性能的重要評(píng)判標(biāo)準(zhǔn)。 針對(duì)某企業(yè)對(duì)軸流風(fēng)扇性能的要求，論文對(duì)三個(gè)產(chǎn)品分別進(jìn)行了細(xì)致的性能研究。首先在室外機(jī)產(chǎn)品上采用三孔探針測(cè)試了風(fēng)扇出口流動(dòng)，進(jìn)而改裝了風(fēng)管性能試驗(yàn)臺(tái)，測(cè)試了不同轉(zhuǎn)速下風(fēng)扇性能，得到了無(wú)量綱風(fēng)扇性能數(shù)據(jù)，同時(shí)測(cè)試了風(fēng)管內(nèi)風(fēng)扇前后速度分布，與原產(chǎn)品測(cè)試數(shù)據(jù)進(jìn)行了對(duì)比。為了進(jìn)一步研究風(fēng)扇葉片流道內(nèi)的流動(dòng)機(jī)構(gòu)，本文采用UG建模軟件中建立了風(fēng)扇實(shí)體模型以供數(shù)值模擬計(jì)算，同時(shí)對(duì)流場(chǎng)不同進(jìn)出口長(zhǎng)度進(jìn)行了分析，，得到了恰當(dāng)?shù)娘L(fēng)扇流場(chǎng)模型，進(jìn)行風(fēng)扇內(nèi)部流場(chǎng)分析。數(shù)值計(jì)算與實(shí)驗(yàn)測(cè)試數(shù)據(jù)對(duì)比分析，首先說(shuō)明了數(shù)值計(jì)算結(jié)果的可靠性，發(fā)現(xiàn)風(fēng)扇葉頂分離渦對(duì)風(fēng)扇性能和計(jì)算結(jié)果有很大的影響，說(shuō)明葉頂間隙對(duì)葉頂分離渦尺度有直接影響，進(jìn)而影響風(fēng)扇整體性能。 為了增強(qiáng)通風(fēng)換熱效果，本文研究了葉片安裝角度增大5o后性能，數(shù)值計(jì)算和實(shí)驗(yàn)測(cè)試均表明新風(fēng)扇的性能達(dá)到了性能改進(jìn)的目標(biāo)。
[Abstract]:Compared with large shopping malls, workshops and domestic air conditioners, small office space equipped with outdoor axial flow heat exchange fans need to be specially designed because of the different heat transfer. This kind of heat exchange fan requires air volume at 5300,6600m3 / h and is usually placed outside the living area slightly away from the living area. Flow rate and total pressure are the important criteria for evaluating the heat transfer performance of the fan. According to the requirements of an enterprise for the performance of axial fan, three products are studied in detail in this paper. First of all, the flow of fan outlet was tested with a three-hole probe on the outdoor unit, and then the air duct performance test rig was modified. The fan performance data were obtained under different rotating speeds. At the same time, the velocity distribution of the fan in the air duct was measured and compared with the test data of the original product. In order to further study the flow mechanism in the flow channel of fan blade, the solid model of fan is established by UG software for numerical simulation. At the same time, the flow field with different inlet and outlet length is analyzed. An appropriate fan flow field model is obtained and the flow field inside the fan is analyzed. Compared with the experimental data, the reliability of the numerical results is demonstrated. It is found that the separation vortex at the top of the fan blade has a great influence on the fan performance and the calculated results. The results show that the tip clearance has a direct effect on the blade tip separation vortex scale, and then affects the overall performance of the fan. In order to enhance the heat transfer effect of ventilation, the performance of the new fan is studied after the blade mounting angle is increased by 5 o. The results of numerical calculation and experimental test show that the performance of the new fan has reached the goal of performance improvement.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TB657.2

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