發(fā)布時(shí)間：2018-12-12 08:24

【摘要】：本文首先綜述了國內(nèi)外對(duì)旋式軸流風(fēng)機(jī)的現(xiàn)狀、發(fā)展趨勢和存在的問題,分析了其空氣動(dòng)力性能和結(jié)構(gòu)特征。在此基礎(chǔ)上,保證設(shè)計(jì)點(diǎn)兩級(jí)等負(fù)載分配,通過對(duì)輪轂比、弦長比、變環(huán)量流型等參數(shù)對(duì)性能影響的對(duì)比研究,設(shè)計(jì)得到一高效雙級(jí)對(duì)旋式軸流風(fēng)機(jī)。進(jìn)一步,對(duì)該對(duì)旋式軸流風(fēng)機(jī)的變轉(zhuǎn)速匹配特性進(jìn)行了數(shù)值模擬研究。本文主要工作及結(jié)果如下： 1.采用等環(huán)量設(shè)計(jì)方法,在設(shè)計(jì)流量點(diǎn),首先討論了輪轂比對(duì)風(fēng)機(jī)性能的影響,優(yōu)選得到適當(dāng)?shù)妮嗇灡葏?shù)；然后,通過改變?nèi)~片弦長沿葉高的變化規(guī)律,研究了稠度變化在調(diào)節(jié)兩級(jí)葉輪負(fù)荷分配中發(fā)揮的作用,初步優(yōu)選得到了高壓比、高效率對(duì)旋式軸流風(fēng)機(jī)的設(shè)計(jì)方案；最后,針對(duì)在設(shè)計(jì)工況的優(yōu)化方案,研究了其在全流量范圍的變工況性能。 2.為進(jìn)一步提高對(duì)旋式軸流風(fēng)機(jī)設(shè)計(jì)性能,在采用等環(huán)量設(shè)計(jì)方法優(yōu)選得到的高壓比、高效率風(fēng)機(jī)設(shè)計(jì)方案基礎(chǔ)上,在保證設(shè)計(jì)點(diǎn)兩級(jí)等負(fù)載分配前提下,采用變環(huán)量流型設(shè)計(jì)方法,分別對(duì)比研究了兩級(jí)轉(zhuǎn)子不同展向載荷分配規(guī)律對(duì)對(duì)旋式軸流風(fēng)機(jī)性能的影響,從中確定了性能最佳的兩級(jí)轉(zhuǎn)子徑向載荷分布規(guī)律,并給出了近似描述該變化規(guī)律的數(shù)學(xué)表達(dá)式。 3.采用全圓周數(shù)值模擬方法,對(duì)包括進(jìn)口集流器、兩級(jí)轉(zhuǎn)子和出口擴(kuò)散器的雙級(jí)對(duì)旋式軸流風(fēng)機(jī)整機(jī)進(jìn)行了變轉(zhuǎn)速匹配特性研究。在四種轉(zhuǎn)速匹配方案下,對(duì)比分析了風(fēng)機(jī)整機(jī)和各級(jí)轉(zhuǎn)子的壓升、效率和功率特性,進(jìn)一步深入流場內(nèi)部,揭示了不同轉(zhuǎn)速匹配下的內(nèi)部流動(dòng)特征,并與僅包含兩級(jí)轉(zhuǎn)子的單通道模擬結(jié)果做了對(duì)比。對(duì)單級(jí)轉(zhuǎn)子特性而言,單通道模型和全圓周模型間最大的區(qū)別在第二級(jí)轉(zhuǎn)子,就全壓升和效率來說,單通道模擬結(jié)果高于全圓周模擬結(jié)果。不同轉(zhuǎn)速匹配下的結(jié)果均顯示,第二級(jí)轉(zhuǎn)子性能改變對(duì)轉(zhuǎn)速變化更為敏感。除各級(jí)轉(zhuǎn)子的良好設(shè)計(jì),進(jìn)口集流器和出口擴(kuò)散器對(duì)提高對(duì)旋式軸流風(fēng)機(jī)的性能也很重要。
[Abstract]:In this paper, the present situation, development trend and existing problems of counterrotating axial fan are reviewed, and its aerodynamic performance and structural characteristics are analyzed. On the basis of this, the design point and two stages of equal load distribution are guaranteed. Through the comparative study of the influence of wheel hub ratio, chord length ratio and flow pattern of variable ring volume on the performance, an efficient two-stage counter-rotating axial flow fan is designed. Furthermore, the variable speed matching characteristics of the counter rotating axial fan are numerically simulated. The main work and results are as follows: 1. At the design flow point, the influence of wheel hub ratio on fan performance is discussed by using equal ring design method, and appropriate hub ratio parameters are obtained. Then, by changing the variation rule of blade chord length along the blade height, the effect of consistency change in regulating the load distribution of two stage impeller is studied, and the design scheme of high pressure ratio and high efficiency counter-rotating axial fan is obtained. Finally, according to the optimization scheme in the design condition, the off-condition performance in the whole flow range is studied. 2. In order to further improve the design performance of the counterrotating axial fan, on the basis of the optimum selection of high pressure ratio and high efficiency fan design scheme by using the equal ring quantity design method, under the premise of guaranteeing the two-stage equal load distribution at the design point, In this paper, the influence of different spanking load distribution law of two stage rotor on the performance of rotating axial fan is studied by using variable annular flow pattern design method, and the radial load distribution law of two stage rotor with the best performance is determined. A mathematical expression describing the variation law is given. 3. The variable speed matching characteristics of a two-stage counter-rotating axial fan including an inlet collector, a two-stage rotor and an outlet diffuser are studied by using the full-circle numerical simulation method. Under four kinds of speed matching schemes, the pressure rise, efficiency and power characteristics of the whole fan machine and the rotor at all levels are compared and analyzed, and the internal flow characteristics under different speed matching conditions are revealed. The results are compared with the single channel simulation results with only two stage rotors. For the characteristics of single-stage rotor, the biggest difference between single-channel model and full-circumferential model is in the second-stage rotor. In terms of full pressure rise and efficiency, single-channel simulation results are higher than that of full-circumferential simulation. The results of different speed matching show that the performance change of the second stage rotor is more sensitive to the speed change. In addition to the good design of the rotor at all levels, the inlet collector and the outlet diffuser are also important for improving the performance of the counterrotating axial fan.
【學(xué)位授予單位】：中國科學(xué)院研究生院（工程熱物理研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH432.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李秋實(shí),陸亞鈞,于清;對(duì)旋軸流壓縮系統(tǒng)的增壓擴(kuò)穩(wěn)途徑實(shí)驗(yàn)分析[J];北京航空航天大學(xué)學(xué)報(bào);2000年06期

2 昌澤舟,銀燕;低壓軸流通風(fēng)機(jī)流型的優(yōu)化計(jì)算[J];東北工學(xué)院學(xué)報(bào);1989年03期

3 王曉林;對(duì)旋式通風(fēng)機(jī)兩級(jí)葉輪最佳流動(dòng)匹配條件的探討[J];礦業(yè)安全與環(huán)保;2003年05期

4 王曉林,張美琴;對(duì)旋式通風(fēng)機(jī)噪聲控制措施的探討[J];礦業(yè)安全與環(huán)保;2004年06期

5 李新;王曉林;鄧鵬;;基于VB語言的軸流式通風(fēng)機(jī)氣動(dòng)參數(shù)設(shè)計(jì)程序的開發(fā)及應(yīng)用[J];礦業(yè)安全與環(huán)保;2007年02期

6 袁小平;李貞杰;胡昌偉;王曉林;;雙級(jí)軸流局部通風(fēng)機(jī)性能試驗(yàn)研究[J];礦業(yè)安全與環(huán)保;2007年S1期

7 羅松;向毅;;對(duì)旋軸流式通風(fēng)機(jī)不同翼型葉片氣動(dòng)性能實(shí)驗(yàn)研究[J];礦業(yè)安全與環(huán)保;2008年S1期

8 高永衛(wèi),李繼宏;軸流通風(fēng)機(jī)五次方流型設(shè)計(jì)[J];風(fēng)機(jī)技術(shù);1999年04期

9 王振羽;對(duì)旋式軸流通風(fēng)機(jī)設(shè)計(jì)中的幾個(gè)問題[J];風(fēng)機(jī)技術(shù);1999年06期

10 崔慶友;陳中才;昌澤舟;;對(duì)旋軸流通風(fēng)機(jī)最優(yōu)輪轂比的研究[J];風(fēng)機(jī)技術(shù);2006年06期

相關(guān)博士學(xué)位論文 前1條

1 周忠寧;對(duì)旋軸流風(fēng)機(jī)流固耦合特性研究及其基于非線性動(dòng)力學(xué)的應(yīng)用[D];中國礦業(yè)大學(xué);2009年

相關(guān)碩士學(xué)位論文 前3條

1 刁文慶;低噪音對(duì)旋式軸流局部通風(fēng)機(jī)的實(shí)驗(yàn)研究[D];重慶大學(xué);2002年

2 黃家友;對(duì)旋軸流式通風(fēng)機(jī)設(shè)計(jì)理論與方法的研究[D];安徽理工大學(xué);2005年

3 王曉林;雙速對(duì)旋軸流式局部通風(fēng)機(jī)空氣動(dòng)力性能優(yōu)化設(shè)計(jì)與實(shí)驗(yàn)研究[D];重慶大學(xué);2008年

，

本文編號(hào)：2374259