本文選題：對(duì)旋式通風(fēng)機(jī) + 軸向間距�。� 參考：《山東科技大學(xué)》2011年碩士論文

【摘要】：對(duì)旋式通風(fēng)機(jī)由于其在安裝方便、結(jié)構(gòu)緊湊、反風(fēng)性能等方面的優(yōu)點(diǎn)被煤礦廣泛采用。然而,近年來(lái)該風(fēng)機(jī)卻逐漸暴露出噪聲高、轉(zhuǎn)子安全性差的缺點(diǎn)。究其原因,主要是因?yàn)閮杉?jí)葉排反向旋轉(zhuǎn),相互間非定常干擾作用強(qiáng)烈。作為軸流式葉輪機(jī)械,前后兩級(jí)葉輪間的軸向間距是影響非定常干擾作用的主要因素,為了給設(shè)計(jì)高效、低噪、安全、緊湊的風(fēng)機(jī)提供軸向間距的選取依據(jù),本文以一臺(tái)FBDCZ36型礦用對(duì)旋式主通風(fēng)機(jī)為研究對(duì)象,通過(guò)數(shù)值計(jì)算分析了額定流量下該風(fēng)機(jī)氣動(dòng)噪聲特性、轉(zhuǎn)子安全性和氣動(dòng)性能隨軸向間距的變化情況。結(jié)果顯示：氣動(dòng)噪聲特性和轉(zhuǎn)子安全性都隨軸向間距增大而改善,但分別在軸向間距達(dá)到0.8倍和0.6-0.7倍第一級(jí)葉中弦長(zhǎng)(b)后,改善趨勢(shì)放緩,進(jìn)一步增加軸向間距意義不大；氣動(dòng)性能則在軸向間距為0.55-0.6b時(shí)達(dá)到最佳,其中,后級(jí)轉(zhuǎn)子的進(jìn)氣角和尾跡與主流的摻混是影響氣動(dòng)性能變化的主要因素。研究結(jié)果表明,0.7b左右是該風(fēng)機(jī)綜合性能較好的軸向間距范圍。 基于結(jié)構(gòu)強(qiáng)度和節(jié)約材料的考慮,大中型軸流式通風(fēng)機(jī)的葉片和輪轂均是中空的,當(dāng)風(fēng)機(jī)運(yùn)轉(zhuǎn)后,該區(qū)域內(nèi)的氣體由于慣性作用形成軸向渦流,從而與轉(zhuǎn)子內(nèi)壁面間存在相對(duì)移動(dòng),由于摩擦作用,該區(qū)域內(nèi)存在一定的能量損失。本文通過(guò)對(duì)一大型礦用軸流式通風(fēng)機(jī)轉(zhuǎn)子中空區(qū)域的非定常流場(chǎng)進(jìn)行數(shù)值計(jì)算,分析了該區(qū)域內(nèi)的能量損失及其機(jī)理。結(jié)果顯示,由于空間尺寸限制、湍流脈動(dòng)以及空氣本身的小慣性,該區(qū)域內(nèi)軸向渦流并不明顯,氣流相對(duì)速度值很小,同時(shí)空氣動(dòng)力粘度僅有10-5的數(shù)量級(jí),該區(qū)域的能量損失非常小,而進(jìn)一步對(duì)該區(qū)域進(jìn)行研究或者實(shí)施處理的意義不大。
[Abstract]:Counter-rotating fan is widely used in coal mine because of its advantages of convenient installation, compact structure and backwind performance. However, in recent years, the fan gradually exposed the shortcomings of high noise and poor rotor safety. The main reason is that the two-stage blade row rotates in reverse, and the unsteady interference between them is strong. As an axial flow impeller machine, the axial spacing between the front and back impellers is the main factor affecting unsteady disturbance. In order to provide the basis for the selection of axial spacing for the design of high efficiency, low noise, safety and compact fan, In this paper, the aerodynamic noise characteristics, rotor safety and aerodynamic performance of a FBDCZ36 mine counter-rotating main ventilator with rated flow rate are numerically analyzed and analyzed with axial spacing. The results show that the aerodynamic noise characteristics and rotor safety are improved with the increase of axial spacing, but after the axial spacing reaches 0.8 times and 0.6-0.7 times the length of the first stage blade chords respectively, the improvement trend slows down, and the further increase of axial spacing is of little significance. The aerodynamic performance is optimal when the axial spacing is 0.55-0.6b, and the inlet angle and the mixing of the wake with the mainstream are the main factors affecting the aerodynamic performance. The results show that about 0.7b is the range of axial spacing of the fan with better comprehensive performance. Considering the structural strength and material saving, the blades and hub of the large and medium-sized axial flow fan are hollow. When the fan is in operation, the gas in the area forms an axial swirl due to inertia. Therefore, there is a relative movement between the inner surface of the rotor and the inner wall of the rotor, and there is a certain energy loss in the region due to friction. In this paper, the unsteady flow field in the rotor hollow region of a large mine axial flow fan is numerically calculated, and the energy loss and its mechanism in this area are analyzed. The results show that due to the space size limitation, turbulence pulsation and the small inertia of the air itself, the axial eddy current is not obvious in the region, the relative velocity of the air flow is very small, and the aerodynamic viscosity is only in the order of 10-5. The energy loss of the region is very small, but the further research or implementation of the region is of little significance.
【學(xué)位授予單位】：山東科技大學(xué)
【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 謝偉,張永建,霍族亮,劉琦,李學(xué)臣;礦井對(duì)旋軸流通風(fēng)機(jī)設(shè)計(jì)中存在的問(wèn)題及解決方法[J];風(fēng)機(jī)技術(shù);2005年04期

2 黃偉光,陳乃興,山崎伸彥,難波昌伸;葉輪機(jī)械動(dòng)靜葉片排非定常氣動(dòng)干涉的數(shù)值模擬[J];工程熱物理學(xué)報(bào);1999年03期

3 李志平,李秋實(shí),陸亞鈞;從非定常效應(yīng)看對(duì)旋風(fēng)扇/壓氣機(jī)的工程實(shí)現(xiàn)[J];工程熱物理學(xué)報(bào);2002年02期

4 祁明旭,豐鎮(zhèn)平,KANGShun,HIRSCHCharles;動(dòng)靜干涉效應(yīng)對(duì)軸流透平級(jí)氣動(dòng)性能的影響[J];工程熱物理學(xué)報(bào);2003年01期

5 閆朝,季路成,陳江,徐建中;軸向間距對(duì)時(shí)序效應(yīng)影響的研究[J];工程熱物理學(xué)報(bào);2004年02期

6 李傳鵬,胡駿,王英鋒,張燎原;軸向間距對(duì)壓氣機(jī)失速特性的影響[J];工程熱物理學(xué)報(bào);2005年02期

7 王嘉冰;劉敏;吳克啟;;開(kāi)式軸流風(fēng)扇氣動(dòng)噪聲預(yù)測(cè)[J];工程熱物理學(xué)報(bào);2007年05期

8 胡駿,湯國(guó)才,于再;動(dòng)葉尾跡對(duì)靜子非定常氣動(dòng)性能影響的研究[J];航空動(dòng)力學(xué)報(bào);1999年04期

9 朱巍,李秋實(shí),范洪濤,陸亞鈞;對(duì)旋風(fēng)機(jī)對(duì)旋葉輪級(jí)間流場(chǎng)的實(shí)驗(yàn)研究[J];航空動(dòng)力學(xué)報(bào);2001年02期

10 張文龍,袁巍,張健,周盛;壓氣機(jī)二維葉柵渦脫落的數(shù)值模擬[J];航空動(dòng)力學(xué)報(bào);2002年05期

相關(guān)碩士學(xué)位論文 前1條

1 凌志軍;對(duì)旋風(fēng)機(jī)流場(chǎng)實(shí)驗(yàn)研究及數(shù)值模擬[D];安徽理工大學(xué);2009年

，

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