本文關(guān)鍵詞： 離心通風(fēng)機(jī) CFD 優(yōu)化設(shè)計(jì) 擴(kuò)散器 內(nèi)泄漏　出處：《安徽理工大學(xué)》2012年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：離心通風(fēng)機(jī)是用于輸送氣體的葉輪機(jī)械設(shè)備,在國(guó)民經(jīng)濟(jì)各部門(mén)的應(yīng)用非常廣泛,是工農(nóng)業(yè)生產(chǎn)中主要耗能設(shè)備之一。隨著我國(guó)環(huán)保意識(shí)的增強(qiáng),工農(nóng)業(yè)生產(chǎn)的不斷發(fā)展,精心設(shè)計(jì)、制造和合理使用通風(fēng)機(jī),對(duì)節(jié)能和減小噪聲污染具有重要意義。 實(shí)驗(yàn)研究法是早期研究葉輪機(jī)械內(nèi)部流動(dòng)的一種重要方法,通�？梢栽谂c所研究的問(wèn)題完全相同的情況下使用,或大體相同的條件下對(duì)實(shí)際問(wèn)題進(jìn)行觀測(cè),從而能夠綜合考慮影響流動(dòng)的各種因素。但是實(shí)驗(yàn)研究方法往往要受到模型尺寸的限制,此外還有邊界影響,相似準(zhǔn)則不完全滿(mǎn)足等問(wèn)題的困擾。實(shí)驗(yàn)的手段、數(shù)據(jù)的精度和可靠性,受測(cè)試儀器儀表性能和環(huán)境的制約,直接導(dǎo)致實(shí)驗(yàn)研究的方法對(duì)復(fù)雜流場(chǎng)的整體分析能力以及對(duì)細(xì)微流動(dòng)結(jié)構(gòu)的認(rèn)識(shí)、分析能力非常有限同時(shí),實(shí)驗(yàn)研究由于成本高、周期長(zhǎng),對(duì)于離心風(fēng)機(jī)內(nèi)部流場(chǎng)的研究有著很大的局限性�，F(xiàn)代優(yōu)化設(shè)計(jì)方法以三維理論為基礎(chǔ),運(yùn)用通用或?qū)Ｓ密浖捎?jì)算機(jī)計(jì)算求解。在此基礎(chǔ)上確定離心通風(fēng)機(jī)部件主要幾何參數(shù)的新方法,為簡(jiǎn)化計(jì)算步驟、提高風(fēng)機(jī)的可靠性提供幫助。 本課題利用CFD軟件fluent對(duì)低壓力后向葉片型離心通風(fēng)機(jī)進(jìn)行數(shù)值模擬計(jì)算,歸納起來(lái),本文進(jìn)行了以下幾個(gè)方面的研究： 第一,利用CFD軟件對(duì)離心風(fēng)機(jī)內(nèi)部流場(chǎng)進(jìn)行了詳細(xì)的研究,為后面的研究提供了可靠依據(jù)；第二,對(duì)內(nèi)泄漏進(jìn)行了詳細(xì)分析,得出風(fēng)機(jī)在安裝過(guò)程中葉輪存在偏心的情況下對(duì)風(fēng)機(jī)性能的影響；第三,對(duì)擴(kuò)散器進(jìn)行優(yōu)化設(shè)計(jì),進(jìn)行了詳細(xì)分析并得出了擴(kuò)散器的最佳尺寸；第四,對(duì)離心風(fēng)機(jī)蝸舌進(jìn)行了優(yōu)化設(shè)計(jì)---臺(tái)階蝸舌,提高了風(fēng)機(jī)的效率。
[Abstract]:Centrifugal ventilator is a kind of impeller machinery used to transport gas. It is widely used in various departments of national economy and is one of the main energy consuming equipments in industrial and agricultural production. The continuous development of industrial and agricultural production, careful design, manufacture and rational use of ventilators are of great significance to energy saving and noise pollution reduction. Experimental method is an important method for the early study of the internal flow of impeller machinery. It can usually be used in the same case as the studied problem or under the same conditions to observe the actual problem. However, the experimental research methods are often limited by the model size, in addition to the boundary effects, similarity criteria are not fully satisfied and other problems. The accuracy and reliability of the data are restricted by the performance and environment of the testing instruments and instruments, which directly lead to the overall analytical ability of the experimental method to the complex flow field and the understanding of the fine flow structure. At the same time, because of the high cost and long period, the research on the internal flow field of centrifugal fan has a great limitation. The modern optimization design method is based on three-dimensional theory. Based on this, a new method for determining the main geometric parameters of centrifugal fan components is presented, which can be used to simplify the calculation steps and improve the reliability of the fan. In this paper, the CFD software fluent is used to simulate and calculate the low pressure backward centrifugal fan. In conclusion, the following aspects are studied in this paper: Firstly, the flow field of centrifugal fan is studied in detail by using CFD software, which provides a reliable basis for the later research. Secondly, the internal leakage is analyzed in detail, and the influence of the eccentric impeller on the performance of the fan is obtained. Thirdly, the optimal design of diffuser is carried out, and the optimum size of diffuser is obtained. In 4th, the optimum design of the centrifugal fan cochlear tongue-step cochlear tongue was carried out to improve the efficiency of the fan.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH432

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張莉,陳漢平,徐忠;離心壓縮機(jī)葉輪內(nèi)部流場(chǎng)的準(zhǔn)三元迭代數(shù)值分析[J];風(fēng)機(jī)技術(shù);2000年05期

2 葉舟;王企鯤;鄭勝;;離心通風(fēng)機(jī)蝸舌及出口流場(chǎng)的數(shù)值模擬分析[J];風(fēng)機(jī)技術(shù);2008年05期

3 潘地林,張立祥;離心式通風(fēng)機(jī)蝸殼內(nèi)部流動(dòng)特性的數(shù)值計(jì)算分析[J];風(fēng)機(jī)技術(shù);1999年03期

4 游斌,E E Elhadi,謝軍龍,王軍,吳克啟;多翼離心風(fēng)機(jī)的三維數(shù)值分析[J];工程熱物理學(xué)報(bào);2003年03期

5 陳名舉;離心通風(fēng)機(jī)的設(shè)計(jì)[J];機(jī)電工程技術(shù);2004年05期

6 李春曦;王松嶺;;離心通風(fēng)機(jī)蝸殼內(nèi)的流動(dòng)特征及節(jié)能改造試驗(yàn)研究[J];機(jī)械工程學(xué)報(bào);2009年07期

7 張寶紅;;礦山通風(fēng)機(jī)的擴(kuò)散器對(duì)其性能的影響[J];礦山機(jī)械;2006年09期

8 潘地林,丁維龍,許云龍;離心式通風(fēng)機(jī)蝸殼型線(xiàn)設(shè)計(jì)方法的理論分析與試驗(yàn)研究[J];流體機(jī)械;2002年04期

9 李棟,顧建明;階梯蝸舌蝸殼的降噪分析和實(shí)驗(yàn)[J];流體機(jī)械;2004年02期

10 艾子健;陳燎原;王西來(lái);凌志軍;;基于FLUENT的通風(fēng)機(jī)擴(kuò)散筒數(shù)值模擬與研究[J];流體機(jī)械;2009年10期

相關(guān)碩士學(xué)位論文 前5條

1 何遠(yuǎn)超;基于SolidWorks的離心通風(fēng)機(jī)參數(shù)化設(shè)計(jì)及研究[D];安徽理工大學(xué);2011年

2 俱利鋒;高效低噪聲離心通風(fēng)機(jī)氣動(dòng)優(yōu)化設(shè)計(jì)研究[D];西北工業(yè)大學(xué);2002年

3 王亞榮;離心通風(fēng)機(jī)變工況流動(dòng)特性數(shù)值分析[D];華北電力大學(xué)（河北）;2003年

4 趙立峰;離心通風(fēng)機(jī)的流場(chǎng)模擬及優(yōu)化設(shè)計(jì)[D];大連交通大學(xué);2005年

5 侯樹(shù)強(qiáng);離心式通風(fēng)機(jī)內(nèi)部流場(chǎng)的數(shù)值模擬[D];浙江大學(xué);2006年

，

本文編號(hào)：1449892