【摘要】：目前隨著重工業(yè)的發(fā)展,離心式壓縮機(jī)已經(jīng)成為壓縮和輸送高壓氣體的關(guān)鍵。然而離心壓縮機(jī)在實(shí)際運(yùn)行過(guò)程中隨著氣候條件和用戶需求,經(jīng)常需要對(duì)進(jìn)入壓縮機(jī)的氣體流量進(jìn)行控制,在壓縮機(jī)首級(jí)前安裝進(jìn)口導(dǎo)葉是一種常見且有效的調(diào)節(jié)流量方式。然而傳統(tǒng)的導(dǎo)葉設(shè)計(jì)流量調(diào)節(jié)范圍有限,導(dǎo)致在冬天或用戶需求流量減少時(shí)將相當(dāng)一部分壓縮氣放空,造成大量的浪費(fèi)。如我國(guó)某生產(chǎn)廠家的壓縮機(jī)在冬天需要放空的氣量高達(dá)30%,而國(guó)外先進(jìn)的設(shè)計(jì)僅需放空15%左右,因此對(duì)于導(dǎo)葉設(shè)計(jì)方法的研究是目前亟需解決的一項(xiàng)關(guān)鍵技術(shù)。 本文通過(guò)CFD軟件NUMECA對(duì)帶有可調(diào)進(jìn)口導(dǎo)葉的離心式壓縮機(jī)的首級(jí)進(jìn)行全通道定常數(shù)值模擬。通過(guò)改進(jìn)導(dǎo)葉葉型以滿足離心壓縮機(jī)流量調(diào)節(jié)性能的要求。結(jié)果表明,與原始葉型相比,新葉型的耗功情況和效率變化不大,但調(diào)節(jié)范圍擴(kuò)大；其中彎葉型的流量調(diào)節(jié)能力高于直葉型。而且研究表明,彎葉型NACA6512對(duì)應(yīng)的流量調(diào)節(jié)范圍最大,夏季時(shí)流量調(diào)節(jié)范圍擴(kuò)大了17.45%,冬季時(shí)擴(kuò)大了7.64%°選取合適的導(dǎo)葉葉型有利于降低離心壓縮機(jī)的運(yùn)行成本。
[Abstract]:With the development of heavy industry, centrifugal compressor has become the key to compress and transport high-pressure gas. However, the centrifugal compressor often needs to control the flow of gas entering the compressor with the weather conditions and user requirements in the actual operation process. It is a common and effective way to adjust the flow rate by installing the inlet guide vane before the first stage of the compressor. However, the limited range of flow regulation in traditional guide vane design leads to a considerable amount of compressed air being emptied in winter or when the user's demand flow is reduced, resulting in a large amount of waste. For example, the compressor of a certain manufacturer in our country needs to be emptied up to 30% in winter, while the advanced design in foreign countries only needs to empty about 15%. Therefore, the research on the design method of guide vane is a key technology that needs to be solved at present. In this paper, the full-channel steady numerical simulation of the first stage of centrifugal compressor with adjustable inlet guide vane is carried out by CFD software NUMECA. By improving the guide vane type to meet the centrifugal compressor flow regulation performance requirements. The results showed that the power consumption and efficiency of the new leaf shape had little change, but the adjustment range was enlarged, and the flow regulation capacity of the curved leaf type was higher than that of the straight leaf type. The results show that the range of flow regulation corresponding to curved NACA6512 is the largest, and the range of flow regulation is 17.45 in summer and 7.64% in winter. The selection of suitable guide vane type is beneficial to reduce the operation cost of centrifugal compressor.
【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)】：TH452

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