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Research Papers

The Effect of Wet Compression on a Multistage Subsonic Compressor

[+] Author and Article Information
Mingcong Luo

e-mail: trylove39@163.com

Qun Zheng

e-mail: zhengqun@hrbeu.edu.cn

Junjie Yang

Harbin Engineering University,
Harbin 150001, China

Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received June 30, 2013; final manuscript received July 3, 2013; published online October 25, 2013. Editor: Ronald Bunker.

J. Turbomach 136(3), 031016 (Oct 25, 2013) (8 pages) Paper No: TURBO-13-1116; doi: 10.1115/1.4025198 History: Received June 30, 2013; Revised July 03, 2013

In this paper, wet compression effect on an eight-stage axial subsonic compressor is simulated by steady numerical methods. Special attention is paid to the compressor design operating condition and rotating stall boundary to contrast and analyze the changes, such as the compressor performance and the flow-field characteristics under dry and wet conditions. The motions of water droplets are also simulated and analyzed. The results indicate that wet compression could weaken or eliminate the flow separation; improve the flow capacity, efficiency, and pressure ratio of this compressor; and make the compressor operating near the rotating stall boundary enter into the normal working condition.

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References

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Figures

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Fig. 1

Computational geometric model and grids

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Fig. 2

Comparison of inlet mass flow rates at the design operating point

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Fig. 3

Comparison of the compressor adiabatic efficiency under dry and wet cases

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Fig. 4

Comparison of outlet temperature under dry and wet cases

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Fig. 5

Comparison of specific compression work per mass under dry and water injection cases

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Fig. 6

Mach number contours at 50% span of compressor stages

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Fig. 7

Temperature contours on the blade-to-blade surface at 50% span of the compressor stages

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Fig. 8

Limiting streamlines on suction surfaces of the compressor blades

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Fig. 9

Axial variation of relative total pressure for dry and wet cases

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Fig. 10

Axial variation of total pressure difference between each wet case and the dry case

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Fig. 11

Axial variation of total temperature for dry and wet cases

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Fig. 12

Torque distribution of eight rotors for dry and wet cases

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Fig. 13

Inlet mass flow rate for different water injection rates

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Fig. 14

Specific compression work per mass of multistage compressor under dry and water injection cases

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Fig. 15

Mach number contour of 98% span on compressor blade-to-blade surfaces at the rotating stall boundary

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Fig. 16

Streamlines adjacent to suction surfaces of the multistage compressor

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Fig. 17

Contours of static pressure on blade-to-blade surfaces at 98% span of the compressor

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Fig. 18

Change of total temperature along the axial direction for dry and wet cases

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Fig. 19

Torque distribution of every rotor for dry and wet cases

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Fig. 20

Integral trajectories of each water droplets group (size: 5 microns, 10 microns, and 20 microns)

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Fig. 21

Trajectories of droplets injected from inlet span 50% with different sizes in eight-stage compressor at the design operating point

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