本文選題：軸流風機 + 運行節(jié)能　； 參考：《東北大學(xué)》2012年碩士論文

【摘要】：在提倡可持續(xù)發(fā)展、節(jié)約能源的大背景下,本文從整體入手,綜合分析影響風機性能的因素。通過對當下關(guān)于軸流風機節(jié)能效果的研究,包括風機的運行調(diào)節(jié)節(jié)能和設(shè)計節(jié)能,首先分析軸流風機的設(shè)計節(jié)能的原理以及計算方法(流型設(shè)計和結(jié)構(gòu)設(shè)計),并分別建立軸流風機的最優(yōu)流型的氣動設(shè)計模型和最優(yōu)結(jié)構(gòu)設(shè)計模型,其次對比分析各種運行調(diào)節(jié)的調(diào)節(jié)原理、節(jié)能效果、適用范圍以及投資大小等。 在滿足軸流通風機設(shè)計參數(shù)的條件下,采用工程設(shè)計方法一一孤立葉型法,分別用等環(huán)量指數(shù)、變環(huán)量指數(shù)設(shè)計一臺軸流風機,進而結(jié)合最優(yōu)化理論設(shè)計最優(yōu)環(huán)量指數(shù)時的風機,最后運用GAMBIT對所設(shè)計的三臺軸流風機完成三維建模。 在風機的節(jié)能設(shè)計環(huán)節(jié),本文借助先進的CFD技術(shù),對影響軸流風機性能的主要參數(shù)進行對比模擬,同時觀測風機內(nèi)部流動情況。通過對比分析三種設(shè)計方法的合理性以及最優(yōu)環(huán)量下的節(jié)能效果,繼而尋找一條提高風機效率、降低設(shè)計成本從而實現(xiàn)風機節(jié)能的途徑。 在風機的節(jié)能運行環(huán)節(jié),本文同樣借助CFD模擬,對本文所優(yōu)化的風機進行工頻和變頻下的對比模擬,考察變頻調(diào)速在風機的運行調(diào)節(jié)中的節(jié)能作用,從而為風機運行的節(jié)能研究提供依據(jù)。 本課題中,通過對不同環(huán)量指數(shù)情況下的功率、壓力以及效率的對比分析,發(fā)現(xiàn)采用最優(yōu)化環(huán)量指數(shù)所設(shè)計的軸流風機其節(jié)能效果要明顯好于其它兩種方法。通過分析云圖發(fā)現(xiàn)風機葉輪尾部渦流和葉頂尾跡渦流也會對風機的節(jié)能效果產(chǎn)生影響。而對于采用了變頻技術(shù)進行運行調(diào)節(jié)的風機,其節(jié)能效果也要好于改變管網(wǎng)特性曲線的運行方案,這也論證了變頻調(diào)速在風機的運行調(diào)節(jié)中具有良好的節(jié)能效果。
[Abstract]:Under the background of advocating sustainable development and saving energy, this paper comprehensively analyzes the factors that affect the performance of fan. Through the current research on the energy saving effect of axial flow fan, including the operation regulation and design energy saving of fan, Firstly, the design principle and calculation method of axial flow fan (flow pattern design and structure design) are analyzed, and the aerodynamic design model and optimal structure design model of axial flow fan are established, respectively. Secondly, the regulation principle, energy saving effect, applicable range and investment size of various operation regulation are compared and analyzed. Under the condition of satisfying the design parameters of the axial fan, an axial fan is designed by using the engineering design method, the isolating blade shape method, the equal ring index and the variable ring volume index, respectively. Combined with the optimization theory, the fan is designed when the optimal annular index is used. At last, three axial flow fans are designed by GAMBIT to complete the 3D modeling. In the energy saving design of the fan, the main parameters affecting the performance of the axial fan are compared and simulated with the help of advanced CFD technology, and the flow inside the fan is observed at the same time. By comparing and analyzing the rationality of the three design methods and the energy saving effect under the optimal ring volume, a way to improve the fan efficiency and reduce the design cost to realize the fan energy saving is found. In the link of energy saving operation of fan, this paper also uses CFD simulation, carries on the contrast simulation under the power frequency and the frequency conversion to the fan optimized in this article, inspects the energy saving function of the frequency conversion speed regulation in the fan operation regulation. So as to provide the basis for energy conservation research of fan operation. In this paper, by comparing and analyzing the power, pressure and efficiency of different ring volume exponents, it is found that the energy saving effect of the axial fan designed by the optimal ring volume index is obviously better than that of the other two methods. By analyzing the cloud map, it is found that the swirl at the tail of the impeller and the wake vortex at the top of the blade will also affect the energy saving effect of the fan. For the fan with frequency conversion technology, its energy-saving effect is better than that of changing the characteristic curve of pipe network, which also proves that the frequency conversion speed regulation has good energy-saving effect in the operation regulation of fan.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH432.1

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