車載高效離心風(fēng)機內(nèi)部流動的數(shù)值模擬
[Abstract]:Truck centrifugal fan requires compact structure, light weight, relatively high outlet pressure, but the traditional design method has low precision and wide range of parameters, so it can not meet the requirements of fan optimization design. In order to improve the design precision of centrifugal fan, it is necessary to analyze the micro flow inside the centrifugal fan. This paper analyzes the design method and the current research situation of the centrifugal fan. The geometry model of the centrifugal fan is established by using SOLIDWORKS software, and the grid division and boundary condition setting are carried out with gambit. The flow field of the fan is numerically calculated with fluent software, and the distribution of the flow field inside the fan is obtained, and the influence of the structure parameters of the fan on the performance of the fan is studied. The results show that the influence of blade inlet installation angle on fan performance is significant except for blade outlet mounting angle. In the further study, the influence of the structural parameters such as inlet installation angle, outlet installation angle, impeller width, volute outlet diffuser angle and the number of blades on the performance of the fan are analyzed. With the increase of blade outlet angle, impeller width and number of blades, the total pressure of the fan increases, and with the increase of the inlet angle of the fan blade, the total pressure of the fan first increases and then decreases, and there is an extreme value. With the increase of expanding angle at the outlet of volute, the total pressure of fan increases, but when the angle of expansion exceeds a certain value, the total pressure increases slowly. Based on the research results, the fan structure is optimized. The numerical simulation results of the fan flow field show that the fan design is reasonable, the full pressure meets the operational requirements, and the static pressure margin is 7.12. The research results provide some theoretical basis and reference for the optimization design of centrifugal fan.
【學(xué)位授予單位】:中國石油大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2011
【分類號】:TH432
【參考文獻】
相關(guān)期刊論文 前10條
1 羅晟,蔡兆麟;變?nèi)~片數(shù)和長短葉片結(jié)構(gòu)對離心葉輪內(nèi)三維粘性流場的影響[J];風(fēng)機技術(shù);2000年06期
2 張師帥,陸明,張巍,黃武雄;計算機輔助通風(fēng)機性能試驗系統(tǒng)[J];風(fēng)機技術(shù);2001年01期
3 朱之墀,唐旭東,李嵩,黃東濤,劉江林,盧鈺;離心通風(fēng)機葉輪氣動設(shè)計工程方法的改進[J];風(fēng)機技術(shù);2001年03期
4 陳修懷,李嵩,黃東濤,呂鍵,朱之墀;利用三維數(shù)值模擬改進離心通風(fēng)機設(shè)計[J];風(fēng)機技術(shù);2003年02期
5 王嘉冰,區(qū)穎達(dá);柜式空調(diào)用多翼離心通風(fēng)機內(nèi)流場的數(shù)值分析[J];風(fēng)機技術(shù);2004年04期
6 潘地林,張立祥;離心式通風(fēng)機蝸殼內(nèi)部流動特性的數(shù)值計算分析[J];風(fēng)機技術(shù);1999年03期
7 胡勝利,吳克啟;風(fēng)機矩形蝸殼內(nèi)部流動特性及其二次流的研究[J];工程熱物理學(xué)報;1993年02期
8 游斌,E E Elhadi,謝軍龍,王軍,吳克啟;多翼離心風(fēng)機的三維數(shù)值分析[J];工程熱物理學(xué)報;2003年03期
9 王松嶺;雷泳;李春曦;黃興;;電廠離心風(fēng)機容積損失的數(shù)值分析[J];華北電力大學(xué)學(xué)報;2006年01期
10 劉正先,曹淑珍,谷傳綱,苗永淼,王玉明,劉艷梅;離心葉輪內(nèi)三維湍流流場的數(shù)值計算與實驗比較[J];流體機械;2000年04期
,本文編號:2139198
本文鏈接:http://www.lk138.cn/kejilunwen/jixiegongcheng/2139198.html