發(fā)布時(shí)間：2018-01-13 19:33

  本文關(guān)鍵詞：基于三維數(shù)值模擬的后向離心通風(fēng)機(jī)葉片葉型研究　出處：《浙江理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 離心通風(fēng)機(jī) 葉片設(shè)計(jì) 葉片進(jìn)口邊 速度分布法 載荷分布法 三元葉片

【摘要】：作為提供氣體動(dòng)力的重要設(shè)備,在國(guó)民經(jīng)濟(jì)中,離心通風(fēng)機(jī)在鋼鐵、能源、電力、煤礦、化工等眾多專業(yè)領(lǐng)域中被廣泛應(yīng)用。但由于受國(guó)內(nèi)研發(fā)水平、制造工藝等多種因素的影響,現(xiàn)行離心通風(fēng)機(jī)的工作效率并不高。近年來(lái),人們已經(jīng)逐步意識(shí)到提高能源的利用率對(duì)于經(jīng)濟(jì)社會(huì)的可持續(xù)發(fā)展至關(guān)重要。因此,從節(jié)約資源的角度來(lái)說(shuō),設(shè)計(jì)一款運(yùn)行效率較高的離心通風(fēng)機(jī)顯得極為重要。為了研究如何提高離心通風(fēng)機(jī)的運(yùn)行效率,本文研究使用的風(fēng)機(jī)是合作單位提供的4-79-7C型離心通風(fēng)機(jī),主要采用計(jì)算軟件來(lái)對(duì)該型通風(fēng)機(jī)的流場(chǎng)進(jìn)行模擬計(jì)算,通過(guò)分析原始通風(fēng)機(jī)的流場(chǎng)情況,來(lái)對(duì)離心通風(fēng)機(jī)的葉片進(jìn)行改進(jìn)與設(shè)計(jì)。本論文的主要研究?jī)?nèi)容有以下的三個(gè)部分:(1)使用計(jì)算模擬軟件對(duì)4-79-7C型離心通風(fēng)機(jī)的運(yùn)行工況進(jìn)行計(jì)算,并研究了不同葉片出口邊角度這一參數(shù),分析其對(duì)該型離心通風(fēng)機(jī)性能的影響。研究結(jié)果顯示,當(dāng)葉片進(jìn)口邊的角度為6°的時(shí)候,此時(shí)的離心通風(fēng)機(jī)的模型相比于原模型在額定工況附近的靜壓效率得到了提高;同時(shí)發(fā)現(xiàn),越靠近風(fēng)機(jī)輪蓋處的截面,氣體流動(dòng)的損失越大,為后續(xù)對(duì)該通風(fēng)機(jī)葉片的優(yōu)化改進(jìn)提供了前期基礎(chǔ)。(2)根據(jù)該型離心通風(fēng)機(jī)內(nèi)部流動(dòng)的特點(diǎn),在不改變?nèi)~輪寬度和葉輪高度的情況下,分別采用速度分布法和載荷分布法這兩種方法來(lái)對(duì)該型離心通風(fēng)機(jī)的葉片進(jìn)行重新設(shè)計(jì),然后分析對(duì)比原風(fēng)機(jī)與采用兩種方法設(shè)計(jì)的葉片的風(fēng)機(jī)的性能。結(jié)果發(fā)現(xiàn),采用這兩種方法設(shè)計(jì)的風(fēng)機(jī)的總壓與效率與原模型相比都有了顯著的提高,而且采用速度分布法設(shè)計(jì)的葉片的效果更好。(3)根據(jù)前兩部分的研究基礎(chǔ)與研究結(jié)論,將第二部分使用速度分布法設(shè)計(jì)的風(fēng)機(jī)模型進(jìn)一步優(yōu)化,對(duì)葉輪輪蓋處氣流流動(dòng)不合理的地方提出進(jìn)一步改善的方法。主要對(duì)輪蓋側(cè)的葉片型線重新設(shè)計(jì),設(shè)計(jì)獲得了三元扭曲形狀的葉片,并通過(guò)三維數(shù)值模擬軟件計(jì)算優(yōu)化后模型的運(yùn)行工況,來(lái)驗(yàn)證其性能的提高。
[Abstract]:As an important equipment to provide gas power, centrifugal fans are widely used in many professional fields such as steel, energy, electricity, coal mine, chemical industry and so on in the national economy, but due to the level of domestic R & D. Due to the influence of manufacturing process and other factors, the efficiency of centrifugal fan is not high. In recent years, people have gradually realized that improving energy efficiency is very important to the sustainable development of economic society. From the point of view of saving resources, it is very important to design a centrifugal fan with high operating efficiency. In order to study how to improve the operation efficiency of centrifugal fan. The fan studied and used in this paper is 4-79-7C centrifugal ventilator provided by cooperative unit. The flow field of this type fan is simulated and calculated by computer software. The flow field of the original fan is analyzed. To improve and design the blade of centrifugal fan. The operating conditions of 4-79-7C centrifugal fan are calculated by using the computer simulation software. The influence of different angle of blade outlet edge on the performance of centrifugal fan is analyzed. The results show that when the angle of blade inlet edge is 6 擄. Compared with the original model, the static pressure efficiency of the centrifugal fan is improved. At the same time, it is found that the closer the cross-section of the fan wheel cover, the greater the loss of gas flow, which provides a preliminary foundation for further optimization and improvement of the fan blade. (2) according to the characteristics of internal flow of this type centrifugal fan. Without changing the width and height of the impeller, the speed distribution method and the load distribution method are used to redesign the blade of the centrifugal fan. The results show that the total pressure and efficiency of the blower designed by the two methods are significantly improved compared with the original model. And the blade designed by velocity distribution method has better effect. According to the research foundation and conclusion of the first two parts, the fan model designed by the velocity distribution method in the second part is further optimized. The method of further improvement is put forward for the unreasonable air flow in the impeller cover. The blade profile of the cover side of the impeller is redesigned and the three dimensional twisted blade is designed. The improved performance of the model is verified by calculating the operating conditions of the optimized model by the three dimensional numerical simulation software.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH432

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 朱正貴;高海燕;;離心風(fēng)機(jī)葉片斜切的計(jì)算與試驗(yàn)研究[J];風(fēng)機(jī)技術(shù);2014年S1期

2 Jií Polansky;László Kalmár;Roman Gápár;;Prediction of Dynamic and Aerodynamic Characteristics of the Centrifugal Fan with Forward Curved Blades[J];Journal of Thermal Science;2013年06期

3 李淼;趙軍;;小型多翼離心風(fēng)機(jī)葉片斜切分析及試驗(yàn)研究[J];風(fēng)機(jī)技術(shù);2012年04期

4 李景銀;牛子寧;梁亞勛;;可控減速法設(shè)計(jì)離心風(fēng)機(jī)兩元葉片的研究[J];西安交通大學(xué)學(xué)報(bào);2009年09期

5 任志安;郝點(diǎn);謝紅杰;;幾種湍流模型及其在FLUENT中的應(yīng)用[J];化工裝備技術(shù);2009年02期

6 石雪松;邱明杰;;新型工業(yè)化時(shí)期我國(guó)離心風(fēng)機(jī)行業(yè)發(fā)展趨勢(shì)分析[J];通用機(jī)械;2009年01期

7 陳慎宇;眭曦;王燦星;;離心式通風(fēng)機(jī)內(nèi)部流場(chǎng)的數(shù)值模擬[J];流體機(jī)械;2007年09期

8 徐長(zhǎng)棱,毛義軍,李凱 ,譚佳建;離心通風(fēng)機(jī)整機(jī)三維流場(chǎng)的數(shù)值模擬[J];風(fēng)機(jī)技術(shù);2005年05期

9 呂偉領(lǐng),席光,宮武旗,張偉;前向多翼離心風(fēng)機(jī)葉片尾跡和蝸殼二次流動(dòng)的試驗(yàn)研究[J];西安交通大學(xué)學(xué)報(bào);2005年01期

10 陳修懷,李嵩,黃東濤,呂鍵,朱之墀;利用三維數(shù)值模擬改進(jìn)離心通風(fēng)機(jī)設(shè)計(jì)[J];風(fēng)機(jī)技術(shù);2003年02期

相關(guān)碩士學(xué)位論文 前4條

1 楊春魚;離心通風(fēng)機(jī)內(nèi)部流動(dòng)特性的數(shù)值模擬與優(yōu)化設(shè)計(jì)[D];安徽理工大學(xué);2012年

2 劉雙來(lái);基于三維數(shù)值模擬的離心式通風(fēng)機(jī)葉輪設(shè)計(jì)方法研究[D];浙江大學(xué);2011年

3 馬廣健;基于控制載荷法的離心風(fēng)機(jī)單板葉片設(shè)計(jì)與內(nèi)部流場(chǎng)分析[D];上海交通大學(xué);2011年

4 李艷奇;4-73型離心風(fēng)機(jī)葉輪葉片開縫的數(shù)值模擬[D];華北電力大學(xué)（河北）;2010年

，

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