Coupling relationship of compound lean parameters of transonic axial compressor

doi:10.19799/j.cnki.2095-4239.2021.0341

Abstract

Abstract:

The development of compressed-air energy storage (CAES) technology is an effective approach to solve the large-scale integration of renewable energy and an important technical means to implement the goal of “carbon peak, carbon neutral” Axial compressors are one of the important components of a CAES system, which requires to have wide working conditions, large flow, and large pressure ratio Considering NASA Stage35 as a prototype, the coupling relationship between the compound-lean height and angle of the rotor and stator blades is examined using numerical simulations and orthogonal tests, and the system is optimized. After optimization, the stall margin increases by 60.56%, and the reduction of efficiency and pressure ratio is acceptable. Through the range analysis, the blade of the compound lean can generally improve the stall margin; however, the peak efficiency and pressure ratio are generally reduced, and the compound lean angle of the rotor blade has considerable impact on the aerodynamic performance of the compressor. The corner separation of the suction surface is more severe close to the root of the blade. In the region of the middle blade, the intensity of the shock wave is weakened, and the accumulation of low-energy fluid is reduced. At the blade tip, the development of the tip leakage flow is slowed down, and the stall margin is enlarged.

Key words: axial compressor, compound lean blades, stall margin, aerodynamic performance

CLC Number:

TH 452

Dan ZHANG, Zhitao ZUO, Xin ZHOU, Wenbin GUO, Haisheng CHEN, Xing WANG. Coupling relationship of compound lean parameters of transonic axial compressor[J]. Energy Storage Science and Technology, 2021, 10(5): 1544-1555.

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参数	数值
设计转速/(r·min^-1)	17188.7
设计流量/(kg·s^-1)	20.8
叶尖速度/(m·s^-1)	454.5
转子进口轮毂比	0.7
动叶展弦比	1.19
静叶展弦比	1.26
动叶叶片数	36
静叶叶片数	46
叶尖间隙/mm	0.408

试验水平	试验因素
试验水平	α₁/(°)	c₁	α₂/(°)	c₂
1	-30	0.1	-30	0.1
2	-20	0.2	-20	0.2
3	-10	0.3	-10	0.3
4	0	0.4	0	0.4
5	10	0.1	10	0.1
6	20	0.2	20	0.2
7	30	0.3	30	0.3

试验次数	试验因素
试验次数	α₁	c₁	α₂	c₂
1	-30	0.1	-30	0.1
2	-30	0.2	-10	0.4
3	-30	0.3	10	0.4
4	-30	0.4	30	0.3
5	-30	0.2	-20	0.3
6	-30	0.3	0	0.2
7	-30	0.4	20	0.2
8	-20	0.1	30	0.3
9	-20	0.2	-20	0.2
10	-20	0.3	0	0.2
11	-20	0.4	20	0.1
12	-20	0.2	-30	0.4
13	-20	0.3	-10	0.4
14	-20	0.4	10	0.3
15	-10	0.1	20	0.4
16	-10	0.2	-30	0.4
17	-10	0.3	-10	0.3
18	-10	0.4	10	0.3
19	-10	0.2	30	0.2
20	-10	0.3	-20	0.2
21	-10	0.4	0	0.1
22	0	0.1	10	0.2
23	0	0.2	30	0.2
24	0	0.3	-20	0.1
25	0	0.4	0	0.4
26	0	0.2	20	0.4
27	0	0.3	-30	0.3
28	0	0.4	-10	0.3
29	10	0.1	0	0.4
30	10	0.2	20	0.3
31	10	0.3	-30	0.3
32	10	0.4	-10	0.2
33	10	0.2	10	0.2
34	10	0.3	30	0.1
35	10	0.4	-20	0.4
36	20	0.1	-10	0.2
37	20	0.2	10	0.1
38	20	0.3	30	0.4
39	20	0.4	-20	0.4
40	20	0.2	0	0.3
41	20	0.3	20	0.3
42	20	0.4	-30	0.2
43	30	0.1	-20	0.3
44	30	0.2	0	0.3
45	30	0.3	20	0.2
46	30	0.4	-30	0.2
47	30	0.2	-10	0.1
48	30	0.3	10	0.4
49	30	0.4	30	0.4

项目	α₁/(°)	c₁	α₂/(°)	c₂
SMI	29.07	17.81	9.29	10.50
EI	3.18	1.13	1.47	0.96
PI	4.81	2.39	1.52	1.28