本文選題：空調(diào)室內(nèi)機(jī)　切入點(diǎn)：貫流式風(fēng)機(jī)　出處：《青島理工大學(xué)》2014年碩士論文

【摘要】：壁掛式空調(diào)室內(nèi)機(jī)的噪聲問題逐漸成為企業(yè)和消費(fèi)者關(guān)注的熱點(diǎn)，，開展空調(diào)室內(nèi)機(jī)風(fēng)道流場(chǎng)優(yōu)化和降噪研究具有重要的現(xiàn)實(shí)意義。本文針對(duì)壁掛式空調(diào)室內(nèi)機(jī)噪聲較大的現(xiàn)狀，對(duì)空調(diào)室內(nèi)機(jī)的流場(chǎng)和噪聲進(jìn)行了數(shù)值模擬和實(shí)驗(yàn)研究。 利用CFD數(shù)值模擬軟件對(duì)空調(diào)室內(nèi)機(jī)風(fēng)道流場(chǎng)進(jìn)行模擬。在模型的建立過程中，貫流式風(fēng)機(jī)的動(dòng)靜區(qū)域采用多重參考系（MRF）模型，把換熱器處理為多孔介質(zhì)加管束的結(jié)構(gòu)，并通過實(shí)驗(yàn)驗(yàn)證了假設(shè)的合理性。模擬室內(nèi)機(jī)采用不等距葉輪時(shí)的流場(chǎng)分布，探討不等距葉輪對(duì)流場(chǎng)的影響。模擬不同形式的換熱器下空調(diào)室內(nèi)機(jī)的流場(chǎng)分布，分析不同形式的換熱器對(duì)室內(nèi)機(jī)流場(chǎng)的影響。結(jié)合FW-H方程對(duì)室內(nèi)機(jī)的噪聲進(jìn)行模擬，確定室內(nèi)機(jī)的主要噪聲源為葉輪處的偶極子聲源。模擬兩種不等距葉輪下的室內(nèi)機(jī)噪聲，隨著葉輪分布不均性增加，室內(nèi)機(jī)的噪聲得到降低。測(cè)量空調(diào)室內(nèi)機(jī)的進(jìn)出口風(fēng)速和噪聲值，并將實(shí)驗(yàn)結(jié)果與模擬結(jié)果進(jìn)行對(duì)比分析，證明了數(shù)值模型的合理性。 研究表明，室內(nèi)機(jī)的渦旋位于蝸舌附近，采用不等距葉輪能夠降低空調(diào)室內(nèi)機(jī)的噪聲，但不利于流場(chǎng)的穩(wěn)定性。采用弧形換熱器可以減小渦旋，優(yōu)化室內(nèi)機(jī)的流場(chǎng)。通過對(duì)空調(diào)室內(nèi)機(jī)的流場(chǎng)及噪聲的數(shù)值模擬和實(shí)驗(yàn)研究，為室內(nèi)機(jī)的流場(chǎng)優(yōu)化和降噪提供了理論參考。
[Abstract]:The noise problem of indoor unit of wall mounted air conditioning has gradually become the focus of attention of enterprises and consumers. It is of great practical significance to study the optimization of air flow field and noise reduction of indoor air channel of indoor air conditioning system. This paper aims at the present situation of large noise in indoor unit of wall mounted air conditioning system. Numerical simulation and experimental study on flow field and noise of indoor air conditioning unit are carried out. CFD numerical simulation software is used to simulate the flow field of the air channel in the indoor air conditioning unit. In the process of establishing the model, the dynamic and static region of the tubular fan is modeled by the multiple reference system (MRF) model, and the heat exchanger is treated as the structure of porous medium and tube bundle. The rationality of the hypothesis is verified by experiments. The flow field distribution in the chamber is simulated when the impeller is not equidistant, and the influence of the flow field on the flow field of the impeller is discussed. The flow field distribution of the indoor air conditioning unit under different heat exchangers is simulated. The influence of different heat exchangers on the flow field of indoor unit is analyzed. The main noise source of indoor unit is determined to be dipole sound source at impeller with FW-H equation, and the indoor noise is simulated under two different impellers. With the increase of the uneven distribution of the impeller, the noise of the indoor unit is reduced, the wind speed and noise value of the indoor unit are measured, and the experimental results are compared with the simulation results, and the rationality of the numerical model is proved. The results show that the vortex of the indoor unit is located near the cochlear tongue, and the noise of the indoor unit can be reduced by using the non-equidistant impeller, but it is not conducive to the stability of the flow field, and the vortex can be reduced by using the arc heat exchanger. Through the numerical simulation and experimental study of the flow field and noise of the indoor unit of air conditioning, the theoretical reference is provided for the optimization and noise reduction of the flow field of the indoor unit.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB657.2;TB53

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 舒朝暉;張強(qiáng);段亞雄;;空調(diào)用貫流風(fēng)機(jī)研究綜述[J];制冷與空調(diào);2016年09期

本文編號(hào)：1694911