【摘要】：隨著環(huán)境污染的日趨加重,空氣凈化器廣泛地受到人們的追捧,與此同時(shí),人們對環(huán)境噪聲的要求也在不斷提高,離心通風(fēng)機(jī)的氣動(dòng)噪聲性能得到越來越多的關(guān)注。應(yīng)某公司要求,本文對一款應(yīng)用于空氣凈化器的后傾式離心風(fēng)機(jī)進(jìn)行數(shù)值模擬,以得到其內(nèi)部流動(dòng)特性和噪聲特性,并在現(xiàn)有風(fēng)機(jī)的基礎(chǔ)上進(jìn)行優(yōu)化設(shè)計(jì),以達(dá)到:轉(zhuǎn)速為2400r/min、流量為315m~3/h時(shí),在不增加噪聲的前提下,保證風(fēng)壓在175Pa以上的要求。本課題研究的主要內(nèi)容有:(1)現(xiàn)有葉輪的逆向建模。對葉輪實(shí)物進(jìn)行掃描,得到葉輪的點(diǎn)云模型,從而逆向建模得到葉輪模型。(2)現(xiàn)有葉輪的流場模擬以及噪聲分析。首先用Hypermesh對模型進(jìn)行網(wǎng)格劃分,然后用Fluent進(jìn)行流場模擬和噪聲分析,得到葉輪的風(fēng)壓分布及數(shù)值、噪聲分布及數(shù)值,從而確定優(yōu)化方案。(3)建立優(yōu)化方案。根據(jù)該葉輪的分析結(jié)果,運(yùn)用正交試驗(yàn)法,建立9種優(yōu)化方案。(4)對9種優(yōu)化方案分別運(yùn)用UG進(jìn)行建模、使用Hypermesh劃分網(wǎng)格,然后運(yùn)用Fluent進(jìn)行穩(wěn)態(tài)分析。(5)將9種方案的穩(wěn)態(tài)結(jié)果進(jìn)行正交試驗(yàn),得到最佳優(yōu)化方案,并將最佳優(yōu)化方案進(jìn)行瞬態(tài)模擬,驗(yàn)證穩(wěn)態(tài)結(jié)果。
[Abstract]:With the increasing environmental pollution, air purifiers are widely sought after by people. At the same time, the requirements for environmental noise are also increasing, and more attention has been paid to the pneumatic noise performance of centrifugal ventilators. At the request of a company, this paper carries on the numerical simulation to a backward centrifugal fan used in the air purifier to obtain its internal flow characteristics and noise characteristics, and optimizes the design on the basis of the existing fan, in order to meet the requirements of the rotating speed of 2400r / min and the flow rate of 315m~3/h, without increasing the noise, to ensure that the wind pressure is above 175Pa. The main contents of this paper are as follows: (1) reverse modeling of existing impeller. By scanning the impeller object, the point cloud model of the impeller is obtained, and the impeller model is obtained by reverse modeling. (2) flow field simulation and noise analysis of the existing impeller. Firstly, the model is meshed with Hypermesh, then the flow field simulation and noise analysis are carried out with Fluent, and the wind pressure distribution, numerical value, noise distribution and numerical value of the impeller are obtained, and the optimization scheme is determined. (3) the optimization scheme is established. According to the analysis results of the impeller, nine optimization schemes are established by orthogonal test method. (4) the nine optimization schemes are modeled by UG, the grid is divided by Hypermesh, and then the steady-state analysis is carried out by Fluent. (5) the steady-state results of the nine schemes are orthogonal test to obtain the optimal scheme, and the optimal optimization scheme is simulated to verify the steady-state results.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM925.16

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 史皓良;吳祿慎;;基于Geomagic軟件的鋼軌彈條的逆向建模及誤差分析[J];南昌大學(xué)學(xué)報(bào)(工科版);2016年01期

2 周小東;成思源;楊雪榮;蔡闖;李碩;;基于逆向工程的參數(shù)化優(yōu)化設(shè)計(jì)[J];組合機(jī)床與自動(dòng)化加工技術(shù);2016年03期

3 潘愛強(qiáng);鮑明;易U嗹，

本文編號：2505111