本文選題：吸油煙機(jī) + CFD�。� 參考：《浙江大學(xué)》2014年碩士論文

【摘要】：在目前國(guó)內(nèi)吸油煙機(jī)市場(chǎng)中,巨大的商機(jī)與激烈的行業(yè)競(jìng)爭(zhēng)并存,各吸油煙機(jī)的品牌關(guān)注度相近。由于各品牌吸油煙機(jī)的性能相近,進(jìn)一步提高吸油煙機(jī)的性能表現(xiàn)和品質(zhì)有助于增強(qiáng)產(chǎn)品的市場(chǎng)競(jìng)爭(zhēng)力。調(diào)查顯示,使用人群在采購(gòu)吸油煙機(jī)時(shí)的兩個(gè)最重要考量因素分別為風(fēng)量和噪聲。吸油煙機(jī)產(chǎn)品的不斷發(fā)展,也對(duì)其風(fēng)量提高和噪聲降低提出了更高要求。優(yōu)化目標(biāo)方面,目前的風(fēng)機(jī)優(yōu)化研究多集中于風(fēng)機(jī)風(fēng)量、效率或噪聲等單方面性能的提升,并且往往以其他方面性能的犧牲為代價(jià),已有的多目標(biāo)研究通常選取風(fēng)量和效率作為優(yōu)化目標(biāo)；優(yōu)化設(shè)計(jì)方面,大量研究基于現(xiàn)有的風(fēng)機(jī)產(chǎn)品進(jìn)行改良,設(shè)計(jì)改進(jìn)空間有限。 本文課題來(lái)源于校企合作項(xiàng)目,目標(biāo)是在提升風(fēng)量的同時(shí),降低氣動(dòng)噪聲。為提高吸油煙機(jī)產(chǎn)品的設(shè)計(jì)改進(jìn)空間,本文設(shè)計(jì)了吸油煙機(jī)風(fēng)機(jī)系統(tǒng)的初始模型,基于計(jì)算流體力學(xué)(Computational Fluid Dynamics)仿真分析工具,用正交實(shí)驗(yàn)的方法分析研究風(fēng)機(jī)結(jié)構(gòu)參數(shù)對(duì)吸油煙機(jī)風(fēng)機(jī)系統(tǒng)的風(fēng)量和噪聲的影響并進(jìn)行結(jié)構(gòu)優(yōu)化設(shè)計(jì),提升了風(fēng)機(jī)性能,分析了葉輪各結(jié)構(gòu)參數(shù)對(duì)于風(fēng)量和噪聲的影響機(jī)理,并提出了運(yùn)用這些機(jī)理優(yōu)化設(shè)計(jì)風(fēng)機(jī)系統(tǒng)的方法。 首先,針對(duì)產(chǎn)品對(duì)于風(fēng)量和噪聲的優(yōu)化要求,采用獨(dú)立參數(shù)經(jīng)驗(yàn)設(shè)計(jì)方法,對(duì)風(fēng)機(jī)進(jìn)行包括蝸殼氣動(dòng)設(shè)計(jì)、葉輪氣動(dòng)設(shè)計(jì)和進(jìn)氣裝置設(shè)計(jì)在內(nèi)的初始參數(shù)設(shè)計(jì),在UG中完成實(shí)體建模和裝配,獲得風(fēng)機(jī)系統(tǒng)的初始模型。 其次,探尋吸油煙機(jī)風(fēng)機(jī)系統(tǒng)的數(shù)值模擬方法,在ICEM CFD中實(shí)現(xiàn)風(fēng)機(jī)流道的網(wǎng)格劃分,在CFX中完成風(fēng)機(jī)系統(tǒng)的旋轉(zhuǎn)模擬仿真計(jì)算,并通過(guò)對(duì)比初始模型的仿真結(jié)果和原有產(chǎn)品的實(shí)測(cè)數(shù)據(jù),分析仿真分析模型的有效性、合理性。 再次,安排模擬正交試驗(yàn),通過(guò)直觀分析得到葉輪各結(jié)構(gòu)參數(shù)對(duì)于風(fēng)量、噪聲影響的極差,通過(guò)采用綜合平衡法和綜合評(píng)分法,確定對(duì)于雙目標(biāo)最優(yōu)的葉輪結(jié)構(gòu)參數(shù)組合方案,通過(guò)對(duì)優(yōu)化后的葉輪進(jìn)行仿真實(shí)驗(yàn),驗(yàn)證其已達(dá)到優(yōu)化設(shè)計(jì)目標(biāo),風(fēng)機(jī)系統(tǒng)風(fēng)量和噪聲表現(xiàn)得到提升。 然后,通過(guò)因素指標(biāo)分析,得到不同葉輪結(jié)構(gòu)參數(shù)下的風(fēng)機(jī)風(fēng)量,在Matlab中實(shí)現(xiàn)不同結(jié)構(gòu)參數(shù)與風(fēng)量的單因素影響關(guān)系描述,通過(guò)對(duì)比觀察不同結(jié)構(gòu)參數(shù)下速度矢量圖、速度云圖、渦流云圖和壓力云圖的變化,發(fā)現(xiàn)導(dǎo)致風(fēng)量下降的摩擦損失、內(nèi)循環(huán)現(xiàn)象和尾跡現(xiàn)象,結(jié)合出口速度三角形模型、相對(duì)渦流模型、影響關(guān)系擬合曲線,分析葉輪各結(jié)構(gòu)參數(shù)對(duì)風(fēng)機(jī)系統(tǒng)風(fēng)量的影響機(jī)理。 最后,討論吸油煙機(jī)風(fēng)機(jī)系統(tǒng)空氣動(dòng)力噪聲源構(gòu)成；基于Proudman噪聲理論研究強(qiáng)前彎葉片的渦流噪聲特性；研究旋轉(zhuǎn)噪聲特性,包括基頻旋轉(zhuǎn)噪聲與整體噪聲對(duì)比以及葉輪結(jié)構(gòu)參數(shù)對(duì)旋轉(zhuǎn)噪聲的影響機(jī)理；分析四極子源噪聲的分布規(guī)律。 本文優(yōu)化得到的吸油煙機(jī)風(fēng)機(jī)系統(tǒng)模型達(dá)到設(shè)計(jì)目標(biāo),通過(guò)雙目標(biāo)優(yōu)化方法提升了研究對(duì)象的風(fēng)量和噪聲表現(xiàn)；研究過(guò)程中得到的分析結(jié)果可為吸油煙機(jī)風(fēng)機(jī)系統(tǒng)核心技術(shù)的開(kāi)發(fā)提供理論和數(shù)據(jù)支持,有助于提高并改善強(qiáng)前彎多葉離心式風(fēng)機(jī)的開(kāi)發(fā)效率和設(shè)計(jì)效果。
[Abstract]:In the current domestic range hood market , the huge business opportunities coexist with the fierce competition , and the brand of each range hood is similar . The research shows that the two most important consideration factors for the range of the range and the noise of the range hood are the air quantity and the noise .
In terms of optimization design , a great deal of research is based on the improvement of the existing fan products , and the design improvement space is limited .

Based on computational fluid dynamics simulation analysis tool , this paper designs an initial model of the fan system of range hood . Based on the computational fluid dynamics simulation analysis tool , the influence of the parameters of the fan structure on the air volume and noise of the fan system of the range hood is analyzed and the structure optimization design is carried out to improve the performance of the fan . The influence mechanism of the parameters of the impeller on the air volume and noise is analyzed , and the method of optimizing the design fan system by using these mechanisms is proposed .

First , aiming at the optimization requirements of air volume and noise for the product , an independent parameter empirical design method is adopted to design the fan , including the aerodynamic design of the volute , the aerodynamic design of the impeller and the design of the air inlet device , and the entity modeling and assembly are completed in UG to obtain the initial model of the fan system .

Secondly , the numerical simulation method of the fan system of the range hood is explored . In the ICEM CFD , the grid division of the fan flow passage is realized , the simulation calculation of the rotation simulation of the fan system is completed in CFX , and the validity and rationality of the simulation analysis model are analyzed by comparing the simulation results of the initial model and the measured data of the original product .

Thirdly , the simulation orthogonal test is arranged to obtain the extremely poor influence of each structural parameter of the impeller on the air volume and the noise by means of an intuitive analysis . By adopting the comprehensive balance method and the comprehensive scoring method , the optimization design objective is determined by simulating the optimized impeller , and the air volume and the noise performance of the fan system are improved .

Then , through the analysis of the factor indexes , the air quantity of the fan under different impeller structure parameters is obtained , and the single factor influence relation description of different structural parameters and air volume is realized in Matlab , the friction loss , the inner circulation phenomenon and the wake phenomenon caused by different structural parameters are observed , and the influence mechanism of the structural parameters of the impeller on the air volume of the fan system is analyzed by combining the outlet velocity triangle model and the relative vortex model and influencing the relation fitting curve .

Finally , the air power noise source of the fan system of the range hood is discussed .
Research on the Characteristics of Eddy Current Noise Based on Proudman Noise Theory
The rotating noise characteristics are studied , including the comparison of the fundamental frequency rotation noise with the whole noise and the influence mechanism of the impeller structure parameters on the rotating noise ;
The distribution law of four - pole sub - source noise is analyzed .

In this paper , the model of the fan system of the range hood is designed to achieve the design goal , and the air volume and noise performance of the object are improved by the double objective optimization method .
The analysis results obtained during the research can provide theory and data support for the development of the core technology of the fan system of the range hood fan , and help to improve and improve the development efficiency and the design effect of the centrifugal fan of the strong front bent multi - blade centrifugal fan .

【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM925.57

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相關(guān)期刊論文 前10條

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本文編號(hào)：1766749