某离心式压缩机可调进口导叶叶型研究
发布时间：2018-11-19 16:26
【摘要】：目前随着重工业的发展,离心式压缩机已经成为压缩和输送高压气体的关键。然而离心压缩机在实际运行过程中随着气候条件和用户需求,经常需要对进入压缩机的气体流量进行控制,在压缩机首级前安装进口导叶是一种常见且有效的调节流量方式。然而传统的导叶设计流量调节范围有限,导致在冬天或用户需求流量减少时将相当一部分压缩气放空,造成大量的浪费。如我国某生产厂家的压缩机在冬天需要放空的气量高达30%,而国外先进的设计仅需放空15%左右,因此对于导叶设计方法的研究是目前亟需解决的一项关键技术。 本文通过CFD软件NUMECA对带有可调进口导叶的离心式压缩机的首级进行全通道定常数值模拟。通过改进导叶叶型以满足离心压缩机流量调节性能的要求。结果表明,与原始叶型相比,新叶型的耗功情况和效率变化不大,但调节范围扩大；其中弯叶型的流量调节能力高于直叶型。而且研究表明,弯叶型NACA6512对应的流量调节范围最大,夏季时流量调节范围扩大了17.45%,冬季时扩大了7.64%°选取合适的导叶叶型有利于降低离心压缩机的运行成本。
[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.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH452
本文编号：2342825
[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.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH452
【参考文献】
相关期刊论文 前9条
1 杨艳琳;;我国建立节能型社会的战略选择[J];中国地质大学学报(社会科学版);2008年01期
2 肖军;谷传纲;舒信伟;高闯;;带可调进口导叶离心压缩机的性能分析[J];动力工程;2006年06期
3 谭佳健;毛义军;祁大同;王锐;王学军;;离心式压缩机可调进口导叶研究综述[J];风机技术;2006年03期
4 黄经国;用可调进口导叶调节特性的大型混流泵[J];流体机械;2000年04期
5 温选锋;袁民建;谭佳健;;离心压缩机进口导叶流场的数值模拟[J];流体机械;2008年08期
6 ;对离心压缩机进气预旋的分析[J];力学学报;1977年02期
7 吴艳辉,楚武利,卢新根;导叶厚度变化对压气机级的性能影响[J];推进技术;2005年05期
8 刘飞,蔡兆麟;离心压缩机级的数值试验及分析[J];通用机械;2005年03期
9 ;对离心压缩机进气预旋的分析[J];西安交通大学学报;1976年02期
相关硕士学位论文 前1条
1 李彩华;叶片断裂与其气动非定常脉动分析[D];大连理工大学;2012年
，本文编号：2342825
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2342825.html
