本文選題：離心壓縮機(jī) + 流固耦合��； 參考：《合肥工業(yè)大學(xué)》2014年碩士論文

【摘要】：再制造與傳統(tǒng)制造相比具有諸多明顯優(yōu)勢(shì)，研究再制造的關(guān)鍵科學(xué)問(wèn)題，契合國(guó)家可持續(xù)發(fā)展的迫切需求、符合國(guó)家的重大戰(zhàn)略目標(biāo)。離心壓縮機(jī)機(jī)組是天然氣輸送管道的核心設(shè)備，是保障西氣東輸能源大動(dòng)脈安全可靠運(yùn)行的關(guān)鍵，大型離心壓縮機(jī)在長(zhǎng)期服役過(guò)程中由于高周疲勞、沖蝕、腐蝕等原因，易導(dǎo)致壓縮機(jī)葉輪失效而需要進(jìn)行再制造。工作中的離心壓縮機(jī)葉輪往往由于長(zhǎng)期在外場(chǎng)作用下產(chǎn)生一系列變化產(chǎn)生變性層，其性能控制是再制造無(wú)損清洗與毛坯復(fù)原的先行條件，，是再制造整體工藝不可或缺的一部分。對(duì)壓縮機(jī)葉輪典型服役環(huán)境進(jìn)行數(shù)值模擬了解變性層的外場(chǎng)作用是研究再制造毛坯變性層的前提。然而對(duì)單一物理場(chǎng)的模擬已經(jīng)很難滿足葉輪機(jī)械數(shù)值模擬準(zhǔn)確性的要求，故采取多場(chǎng)耦合的分析方法。 本文選擇沈陽(yáng)鼓風(fēng)機(jī)集團(tuán)所生產(chǎn)的大型長(zhǎng)輸管線壓縮機(jī)作為研究對(duì)象，運(yùn)用大型有限元分析軟件ANSYS的ANSYS Workbench Environment(AWE)進(jìn)行了壓縮機(jī)核心部件葉輪葉片的流固耦合、熱-結(jié)構(gòu)耦合問(wèn)題的數(shù)值模擬與分析，并對(duì)模型選取出口流量分別為9.5kg/s、10.0kg/s、10.5kg/s、11.0kg/s和11.5kg/s進(jìn)行數(shù)值模擬，揭示了全工況下葉輪性能和流場(chǎng)流動(dòng)情況，得出葉輪變性層典型服役環(huán)境下的溫度場(chǎng)與載荷場(chǎng)，為再制造毛坯變性層形成機(jī)理制備實(shí)驗(yàn)研究提供了相應(yīng)的數(shù)據(jù)，并且對(duì)提高壓縮機(jī)葉輪性能、結(jié)構(gòu)強(qiáng)度，增強(qiáng)整機(jī)運(yùn)行的可靠性與安全性，延長(zhǎng)工作壽命有著一定意義。
[Abstract]:Compared with traditional manufacturing, remanufacturing has many obvious advantages. To study the key scientific problems of remanufacturing accords with the urgent need of national sustainable development and accords with the great strategic goal of the country. The centrifugal compressor unit is the core equipment of the natural gas pipeline, and the key to ensure the safe and reliable operation of the energy artery in the west to east gas transmission. During the long service of the large centrifugal compressor, due to high cycle fatigue, erosion, corrosion and other reasons, It is easy to cause compressor impeller failure and need to be remanufactured. The centrifugal compressor impellers often produce a series of denatured layers due to a series of changes under the action of external field for a long time. The performance control of centrifugal compressor impellers is the leading condition for non-destructive cleaning and blank restoration in remanufacturing, and it is an indispensable part of the whole remanufacturing process. Numerical simulation of typical service environment of compressor impeller is the premise of studying the remanufacture of denatured layer. However, the simulation of a single physical field is difficult to meet the requirements of the accuracy of the numerical simulation of impeller machinery, so the multi-field coupling analysis method is adopted. In this paper, the large-scale long-distance pipeline compressor produced by Shenyang Blower Group is chosen as the research object, and the flow and solid coupling of impeller blade, the core component of the compressor, is carried out by using ANSYS Workbench Environment awe of the large-scale finite element analysis software ANSYS. The numerical simulation and analysis of thermal-structural coupling problem are carried out, and the flow rate of the impeller is 9.5 kg / s ~ 10.0 kg / s ~ (10. 5) kg / s and 11.5kg/s, respectively. The results show that the impeller performance and flow field flow under full working conditions are investigated. The temperature field and load field of the impeller denatured layer in typical service environment are obtained, which provides the corresponding data for the experimental study on the mechanism of the formation of the denatured layer in the remanufacturing of the blank, and it also improves the performance and the structural strength of the compressor impeller. It is significant to enhance the reliability and safety of the whole machine and prolong its working life.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH452

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