本文選題：軸流風(fēng)扇 + 優(yōu)化設(shè)計(jì)�。� 參考：《浙江理工大學(xué)》2012年碩士論文

【摘要】：葉片形狀是影響小型軸流風(fēng)扇性能的主要因素，因此針對風(fēng)扇葉片的改型是優(yōu)化小型軸流風(fēng)扇性能的重要手段，CFD技術(shù)的快速發(fā)展為優(yōu)化此類葉輪機(jī)械提供了便捷有效的優(yōu)化手段。本論文以靜壓為優(yōu)化目標(biāo)，對一種軸流風(fēng)扇進(jìn)行優(yōu)化設(shè)計(jì)，得出性能更優(yōu)的風(fēng)扇模型；制造樣機(jī)模型并對優(yōu)化前后模型進(jìn)行了數(shù)值模擬計(jì)算；最后對優(yōu)化前后風(fēng)扇模型進(jìn)行靜特性的實(shí)測研究。主要內(nèi)容如下： (1)回顧了葉輪機(jī)械及風(fēng)扇研究的發(fā)展歷程，包括數(shù)值模擬和優(yōu)化設(shè)計(jì)的國內(nèi)外發(fā)展現(xiàn)狀。 (2)對小型軸流風(fēng)扇樣機(jī)進(jìn)行了參數(shù)化造型，以直線和簡單貝賽爾曲線控制葉片周向定位，分別進(jìn)行參數(shù)化擬合，基于靜壓為優(yōu)化目標(biāo)對風(fēng)扇進(jìn)行優(yōu)化設(shè)計(jì)研究，得到了兩種靜壓最高的風(fēng)扇參數(shù)，并導(dǎo)出三維模型。 (3)采用雷諾時(shí)均Navier-Stokes方程和Spalart-Allmaras模型湍流模型，對優(yōu)化前后風(fēng)扇進(jìn)行三維數(shù)值模擬，分析靜特性和內(nèi)部流動狀況，計(jì)算結(jié)果表明，優(yōu)化后兩風(fēng)扇的性能得到提高。 (4)制造優(yōu)化后風(fēng)扇實(shí)物模型，利用風(fēng)洞測試系統(tǒng)對優(yōu)化前后的風(fēng)扇進(jìn)行靜特性的實(shí)測，，得到性能曲線，結(jié)果表明，優(yōu)化后風(fēng)扇模型的靜壓高于優(yōu)化前，驗(yàn)證了優(yōu)化方法的可行性。
[Abstract]:The shape of the blade is the main factor affecting the performance of the small axial fan. Therefore, the modification of fan blade is an important means to optimize the performance of small axial flow fan. The rapid development of CFD technology provides a convenient and effective optimization method for optimizing this kind of impeller machinery. In this paper, a fan model with better performance is obtained by optimizing the design of an axial fan with static pressure as the optimization objective, and the model of prototype is made and the model before and after optimization is numerically simulated. Finally, the static characteristics of the fan model before and after optimization are studied. The main contents are as follows: 1) the development of impeller machinery and fan research, including numerical simulation and optimal design at home and abroad, is reviewed. 2) Parametric modeling of a small axial fan prototype is carried out. The blade circumferential positioning is controlled by straight line and simple Bessel curve, and parameterized fitting is carried out respectively. The fan is optimized and designed based on static pressure. Two kinds of fan parameters with the highest static pressure are obtained and the three-dimensional model is derived. Three dimensional numerical simulation of the fan before and after optimization is carried out by using Reynolds time averaged Navier-Stokes equation and Spalart-Allmaras model turbulence model. The static characteristics and internal flow state are analyzed. The results show that the performance of the two fans is improved after optimization. The static characteristics of the fan before and after the optimization are measured by wind tunnel test system, and the performance curves are obtained. The results show that the static pressure of the optimized fan model is higher than that before optimization. The feasibility of the optimization method is verified.
【學(xué)位授予單位】：浙江理工大學(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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