Investigation of the tip injection for stall control in a transonic compressor with inlet distortion

IF 1.1 Q4 ENGINEERING, MECHANICAL
Wenqiang Zhang, M. Vahdati
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引用次数: 1

Abstract

Experimental studies have shown that tip injection upstream of the rotor can extend its operational range when subjected to circumferential inlet distortion. Typically, injectors are placed uniformly around the annulus. However, such arrangement consumes a large amount of high-pressure air and decreases the overall efficiency of the compression system. The aim of this paper is to minimise the amount of the injected air by determining the most effective circumferential location for the injector. In this study, NASA stage 35 was used as the test case. The experiment was conducted with a circumferential total pressure distortion of 120 degrees. In the first part of this paper, numerical simulations were compared against the experimental data and good match was obtained. In the second part, tip injection at three different positions were tested: the clean flow region (Position 1), the distorted region (Position 2) and the border between the clean and distorted regions (Position 3). It was found that a mild injection (0.66% of the main flow) at Position 2 and Position 3 can extend the stall margin by 1.8% and 2.7%, respectively. No obvious improvement was observed for the injection at Position 1. With a larger injection of 1.5% of main flow at Position 3, the stall margin improved further with no efficiency loss.
考虑进气道畸变的跨声速压气机叶尖喷射失速控制研究
实验研究表明,在进气道周向畸变作用下,转子上游的尖端喷射可以扩大其工作范围。通常,注入器均匀地放置在环空周围。然而,这种布置消耗了大量的高压空气,降低了压缩系统的整体效率。本文的目的是通过确定喷射器最有效的周向位置来最小化注入空气的量。在本研究中,NASA阶段35被用作测试案例。实验是在120度的周向总压畸变下进行的。本文第一部分将数值模拟与实验数据进行了比较,得到了较好的吻合结果。在第二部分中,对洁净区(位置1)、畸变区(位置2)和洁净区与畸变区交界处(位置3)三个不同位置的叶尖喷射进行了测试。结果发现,在位置2和位置3进行轻度喷射(占主流的0.66%)可分别延长1.8%和2.7%的失速裕度。第1位注射未见明显改善。在3号位置注入1.5%的主流流量,进一步提高了失速余量,同时没有效率损失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of the Global Power and Propulsion Society
Journal of the Global Power and Propulsion Society Engineering-Industrial and Manufacturing Engineering
CiteScore
2.10
自引率
0.00%
发文量
21
审稿时长
8 weeks
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