【摘要】：軸流式壓氣機(jī)不但是燃?xì)廨啓C(jī)的三大核心部件之一,而且作為單獨(dú)的動(dòng)力設(shè)備在工業(yè)、能源、化工等行業(yè)中具有舉足輕重的作用；所以壓氣機(jī)的設(shè)計(jì)一直以來(lái)都受到了高度的重視。在多級(jí)軸流壓氣機(jī)新的設(shè)計(jì)中,為了縮短設(shè)計(jì)周期、增加設(shè)計(jì)可靠性、降低設(shè)計(jì)成本,經(jīng)常在現(xiàn)有壓氣機(jī)的基礎(chǔ)上進(jìn)行加零級(jí)設(shè)計(jì)來(lái)增加質(zhì)量流量或提高壓比從而得到滿足新要求的壓氣機(jī)。 本文分析了原壓氣機(jī)的性能、加級(jí)要求以及基于相似準(zhǔn)則的加零級(jí)設(shè)計(jì)基本原理；討論了壓氣機(jī)加零級(jí)的設(shè)計(jì)流程以及加級(jí)匹配點(diǎn)的選擇、零級(jí)壓比和通流的確定,并在此基礎(chǔ)上進(jìn)行了壓氣機(jī)零級(jí)的一維設(shè)計(jì),從而得到零級(jí)各個(gè)截面的參數(shù)；通過零級(jí)的平面葉型選擇、對(duì)稱葉型厚度分布及中弧線的確定、葉型的扭轉(zhuǎn)設(shè)計(jì)等步驟完成了零級(jí)葉柵的三維設(shè)計(jì) 利用CFD計(jì)算軟件對(duì)所設(shè)計(jì)零級(jí)以及壓氣機(jī)加級(jí)前后共15條特性曲線各個(gè)工況點(diǎn)進(jìn)行了計(jì)算。文章首先分析了因蝸殼造成的進(jìn)氣不均勻的影響、壓氣機(jī)加級(jí)前后總體性能以及所設(shè)計(jì)零級(jí)的總體性能；并從相對(duì)氣流角、絕對(duì)氣流角、總壓壓比、反動(dòng)度、折合流量、折合轉(zhuǎn)速等方面分析了加級(jí)前后的匹配情況;然后通過葉片型面靜壓分布、徑向加功量分布討論了葉片載荷的問題；通過葉片表面流線、S1流面的流線和馬赫數(shù)的比較分析了流場(chǎng)性能；通過葉頂泄露以及熵的比較,分析了壓氣機(jī)中損失的情況；最后分析了非設(shè)計(jì)工況下壓氣機(jī)加級(jí)前后的性能比較。通過以上分析可以看出,壓氣機(jī)加零級(jí)后質(zhì)量流量滿足了新的工作條件的要求,并具有良好的整體匹配性能,原壓氣機(jī)的流動(dòng)狀況得到了改善,加級(jí)后的壓氣機(jī)具有更好的運(yùn)行穩(wěn)定性。
[Abstract]:Axial flow compressor is not only one of the three core components of gas turbine, but also plays an important role in industrial, energy, chemical and other industries as a separate power equipment. So the design of compressor has been highly valued. In the new design of multistage axial flow compressor, in order to shorten the design period, increase the design reliability and reduce the design cost, The zero stage design is often carried out on the basis of the existing compressor to increase the mass flow rate or increase the pressure ratio to obtain a compressor that meets the new requirements. In this paper, the performance of the original compressor, the requirements of the adding stage and the basic principle of the zero-adding stage design based on the similarity criterion are analyzed, and the design flow of the zero-adding stage of the compressor and the selection of the matching point, the determination of the zero-stage pressure ratio and the flow passage are discussed. On this basis, the one-dimensional design of the zero stage of the compressor is carried out, and the parameters of each section of the zero stage are obtained, and the thickness distribution of the symmetrical blade and the determination of the middle arc are obtained through the plane blade shape selection of the zero stage. The three dimensional design of the zero cascade was completed by the torsional design of the blade shape. The design of zero stage and the compressor before and after the addition of the zero stage were calculated by using the CFD calculation software, and 15 characteristic curves were calculated at each working point of the designed zero stage and the compressor before and after the addition of the zero stage. This paper first analyzes the influence of the inlet air inhomogeneity caused by the volute, the overall performance of the compressor before and after adding the stage and the overall performance of the designed zero stage, and analyzes the relative air flow angle, the absolute air flow angle, the total pressure ratio, the reaction degree and the equivalent flow rate. The matching situation before and after adding grade is analyzed in the aspects of reduced speed and so on, and then the problem of blade load is discussed through the static pressure distribution of blade profile and radial power addition distribution. The flow field performance is analyzed by comparing the streamlines and Mach numbers on the surface of the blade, S1 and the blade surface, and the loss in the compressor is analyzed by comparing the leakage of the blade top and the entropy. Finally, the performance comparison of compressor before and after adding stage under off-design condition is analyzed. Through the above analysis, it can be seen that the mass flow rate of the compressor after adding zero stage meets the requirements of the new working conditions, and has good overall matching performance, and the flow condition of the original compressor has been improved. The added stage compressor has better operation stability.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH453

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