【摘要】：目前隨著重工業(yè)的發(fā)展,離心式壓縮機已經(jīng)成為壓縮和輸送高壓氣體的關(guān)鍵。然而離心壓縮機在實際運行過程中隨著氣候條件和用戶需求,經(jīng)常需要對進入壓縮機的氣體流量進行控制,在壓縮機首級前安裝進口導(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將相當(dāng)一部分壓縮氣放空,造成大量的浪費。如我國某生產(chǎn)廠家的壓縮機在冬天需要放空的氣量高達30%,而國外先進的設(shè)計僅需放空15%左右,因此對于導(dǎo)葉設(shè)計方法的研究是目前亟需解決的一項關(guān)鍵技術(shù)。 本文通過CFD軟件NUMECA對帶有可調(diào)進口導(dǎo)葉的離心式壓縮機的首級進行全通道定常數(shù)值模擬。通過改進導(dǎo)葉葉型以滿足離心壓縮機流量調(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對應(yīng)的流量調(diào)節(jié)范圍最大,夏季時流量調(diào)節(jié)范圍擴大了17.45%,冬季時擴大了7.64%°選取合適的導(dǎo)葉葉型有利于降低離心壓縮機的運行成本。
[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)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TH452

【參考文獻】

相關(guān)期刊論文 前9條

1 楊艷琳;;我國建立節(jié)能型社會的戰(zhàn)略選擇[J];中國地質(zhì)大學(xué)學(xué)報(社會科學(xué)版);2008年01期

2 肖軍;谷傳綱;舒信偉;高闖;;帶可調(diào)進口導(dǎo)葉離心壓縮機的性能分析[J];動力工程;2006年06期

3 譚佳健;毛義軍;祁大同;王銳;王學(xué)軍;;離心式壓縮機可調(diào)進口導(dǎo)葉研究綜述[J];風(fēng)機技術(shù);2006年03期

4 黃經(jīng)國;用可調(diào)進口導(dǎo)葉調(diào)節(jié)特性的大型混流泵[J];流體機械;2000年04期

5 溫選鋒;袁民建;譚佳健;;離心壓縮機進口導(dǎo)葉流場的數(shù)值模擬[J];流體機械;2008年08期

6 ;對離心壓縮機進氣預(yù)旋的分析[J];力學(xué)學(xué)報;1977年02期

7 吳艷輝,楚武利,盧新根;導(dǎo)葉厚度變化對壓氣機級的性能影響[J];推進技術(shù);2005年05期

8 劉飛,蔡兆麟;離心壓縮機級的數(shù)值試驗及分析[J];通用機械;2005年03期

9 ;對離心壓縮機進氣預(yù)旋的分析[J];西安交通大學(xué)學(xué)報;1976年02期

相關(guān)碩士學(xué)位論文 前1條

1 李彩華;葉片斷裂與其氣動非定常脈動分析[D];大連理工大學(xué);2012年

，

本文編號：2342825