高速燃?xì)鈬娡繕層萌加挽F化噴嘴結(jié)構(gòu)參數(shù)優(yōu)化
發(fā)布時(shí)間：2018-06-12 07:58
本文選題：高速燃?xì)鈬娡?/strong> + 噴嘴��； 參考：《焊接學(xué)報(bào)》2017年06期
【摘要】：為開發(fā)出以航空煤油為燃料的新型高速燃?xì)鈬娡繕?需設(shè)計(jì)出高效的煤油霧化噴嘴.文中提出了一種雙氣流空氣助力霧化噴嘴,并運(yùn)用計(jì)算流體動(dòng)力學(xué)(CFD)模擬技術(shù)計(jì)算了該噴嘴的氣流場(chǎng),分析了噴嘴主、輔氣出口截面積比對(duì)霧化氣流場(chǎng)分布的影響規(guī)律,發(fā)現(xiàn)主、輔氣出口截面積比增大,氣流的噴射錐角相應(yīng)增大,最大速度減小.綜合考慮噴射錐角和氣流速度對(duì)霧化效果的影響,確定主、輔氣出口截面積比在1.01~1.34范圍內(nèi)噴嘴霧化效果較好.利用高速攝像系統(tǒng)對(duì)優(yōu)化噴嘴的噴霧形態(tài)進(jìn)行了試驗(yàn)分析,發(fā)現(xiàn)拍攝到的噴霧形態(tài)和計(jì)算機(jī)模擬結(jié)果一致,具有良好的霧化效果.
[Abstract]:In order to develop a new high speed gas spray gun with aviation kerosene as fuel, a high efficiency kerosene atomizing nozzle should be designed. In this paper, a two-flow air-assisted atomizing nozzle is proposed, and the flow field of the nozzle is calculated by using the computational fluid dynamics (CFD) simulation technique. The influence of the cross-sectional area ratio of the nozzle's main and auxiliary gas outlet on the distribution of the atomized airflow field is analyzed. It is found that the jet cone angle increases and the maximum velocity decreases with the increase of the cross section area ratio of the main and auxiliary gas outlet. Considering the influence of injection cone angle and airflow velocity on atomization effect, it is determined that the nozzle atomization effect is better in the range of 1.01 ~ 1.34 for the main and auxiliary gas outlet. The spray morphology of the optimized nozzle was analyzed with a high speed camera system. It was found that the spray morphology obtained was consistent with the computer simulation results and had a good atomization effect.
【作者單位】： 裝甲兵工程學(xué)院機(jī)械產(chǎn)品再制造國(guó)家工程研究中心;再制造技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51375492,51575527);國(guó)家自然科學(xué)基金青年基金資助項(xiàng)目(51405510)
【分類號(hào)】：TG173
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