【摘要】：葉輪機(jī)械在國民經(jīng)濟(jì)尤其是整個(gè)重工業(yè)體系中占有十分重要的地位。軸流式葉輪機(jī)械被廣泛的應(yīng)用于航空、艦船、導(dǎo)彈、坦克、高速重載機(jī)車、電站、空分和冶煉等高端技術(shù)領(lǐng)域。由于軸流增壓式葉輪機(jī)械內(nèi)部流動(dòng)異常復(fù)雜,且試驗(yàn)研究的周期較長、成本高,故本文借助先進(jìn)CFD技術(shù),以實(shí)際工程項(xiàng)目為依托,主要采用數(shù)值模擬的方法研究軸流增壓式葉輪機(jī)械內(nèi)部真實(shí)的流動(dòng)狀況,結(jié)合適當(dāng)?shù)膶?shí)驗(yàn)驗(yàn)證分析,掌握其流動(dòng)現(xiàn)象發(fā)生、發(fā)展的規(guī)律。目前,這種研究方法在葉輪領(lǐng)域是廣泛采用的研究方法之一。 針對(duì)某多級(jí)軸流式燃?xì)鈮嚎s機(jī),本文中通過CFD數(shù)值分析軟件NUMECA研究其內(nèi)流部件構(gòu)型與氣動(dòng)性能的映射規(guī)律,探究其設(shè)計(jì)特點(diǎn)；結(jié)合數(shù)值方法與物理仿真,掌握部件流動(dòng)參數(shù)及載荷分布規(guī)律；特別研究工質(zhì)組分復(fù)雜且隨流動(dòng)易變的特點(diǎn)對(duì)軸流燃?xì)鈮嚎s機(jī)性能影響,提出符合工程精度要求的計(jì)算方法,分析總結(jié)多級(jí)軸流燃?xì)鈮嚎s機(jī)的設(shè)計(jì)特點(diǎn),為軸流式燃?xì)鈮嚎s機(jī)改進(jìn)以及�；O(shè)計(jì)提供技術(shù)支持。 針對(duì)某大功率機(jī)車?yán)鋮s塔軸流通風(fēng)機(jī),本文以某進(jìn)口冷卻風(fēng)機(jī)原始數(shù)據(jù)為基礎(chǔ),根據(jù)機(jī)車新的設(shè)計(jì)要求,以成熟的一維計(jì)算方法為基礎(chǔ)對(duì)其葉輪進(jìn)行多方案改進(jìn)設(shè)計(jì)并獲得多組結(jié)構(gòu)數(shù)據(jù),以此為基礎(chǔ)建立葉片以及葉輪三維實(shí)體模型,采用CFD軟件NUMECA對(duì)葉輪內(nèi)部流場進(jìn)行了深入分析與研究。經(jīng)過性能對(duì)比并根據(jù)制造需求,確定了最終的葉輪方案,并完成部分樣機(jī)制造及氣動(dòng)實(shí)驗(yàn)驗(yàn)證。在滿足外形尺寸不變、降低轉(zhuǎn)速、限制功率的苛刻條件下,實(shí)現(xiàn)出口風(fēng)壓相對(duì)提高以及效率改善的葉輪設(shè)計(jì)需求。
[Abstract]:Impeller machinery plays an important role in the national economy, especially in the whole heavy industry system. Axial flow impeller machinery is widely used in aviation, ships, missiles, tanks, high-speed heavy haul locomotives, power stations, air separation and smelting and other high-end technical fields. Because the internal flow of axial flow turbocharged impeller is extremely complex, the period of experimental study is longer and the cost is high, so this paper relies on the actual project with the help of advanced CFD technology. The real flow situation in axial flow turbocharged impeller machinery is studied by numerical simulation, and the occurrence and development law of flow phenomenon is grasped in combination with appropriate experimental verification and analysis. At present, this research method is widely used in the field of impeller research. Aiming at a multistage axial flow gas compressor, this paper studies the mapping law between the configuration and aerodynamic performance of its internal flow components by CFD numerical analysis software NUMECA, and probes into its design characteristics. Combined with numerical method and physical simulation, the flow parameters and load distribution of components are grasped. In particular, the influence of the complex composition of working fluid on the performance of axial flow gas compressor is studied, and the calculation method according with the requirement of engineering precision is put forward, and the design characteristics of multistage axial flow gas compressor are analyzed and summarized. Provide technical support for axial flow gas compressor improvement and modeling design. Based on the original data of an imported cooling fan, according to the new design requirements of locomotive, this paper aims at the axial flow ventilator of a high power locomotive cooling tower. On the basis of the mature one-dimensional calculation method, the impeller was improved by multi-scheme design and the multi-group structure data were obtained. Based on this, the three-dimensional solid model of the blade and impeller was established. The flow field in impeller was analyzed and studied by CFD software NUMECA. Finally, the final impeller scheme is determined according to the requirement of manufacturing, and some prototyping and aerodynamic experiments are completed. The impeller design requirement of relative increase of outlet wind pressure and improvement of efficiency can be achieved under the harsh conditions of constant shape size, reducing rotational speed and limiting power.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH453;TH43

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 李琪;軸流壓縮機(jī)葉片氣動(dòng)設(shè)計(jì)[D];南京航空航天大學(xué);2016年

2 尚興超;某氣動(dòng)發(fā)射系統(tǒng)關(guān)鍵問題研究[D];南京理工大學(xué);2014年

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本文編號(hào)：2359466