Research Papers: Gas Turbines: Aircraft Engine

Wave Rotor Design Method With Three Steps Including Experimental Validation

[+] Author and Article Information
Shining Chan

School of Aerospace Engineering,
Xiamen University,
No. 422, Siming South Road, Siming District,
Xiamen 361005, Fujian, China
e-mail: chansn2007@163.com

Huoxing Liu

National Key Laboratory of Science and
Technology on Aero-Engine
School of Energy and Power Engineering,
Beihang University,
XueYuan Road, No. 37, Haidian District,
Beijing 100191, China
e-mail: liuhuoxing@126.com

Fei Xing

School of Aerospace Engineering,
Xiamen University,
No. 422, Siming South Road, Siming District,
Xiamen 361005, Fujian, China
e-mail: fei_xing_xmu@163.com

Hang Song

AVIC CAPDI Integration Equipment Co., Ltd,
No. 2 Gaoxin 3rd Street, Changping District,
Beijing 102206, China
e-mail: songhang@buaa.edu.cn

1Corresponding author.

Contributed by the Aircraft Engine Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received August 17, 2017; final manuscript received November 14, 2017; published online July 13, 2018. Assoc. Editor: Haixin Chen.

J. Eng. Gas Turbines Power 140(11), 111201 (Jul 13, 2018) (13 pages) Paper No: GTP-17-1463; doi: 10.1115/1.4038815 History: Received August 17, 2017; Revised November 14, 2017

This paper adapted and extended the preliminary two-step wave rotor design method with another step of experimental validation so that it became a self-validating wave rotor design method with three steps. First, the analytic design based on unsteady pressure wave models was elucidated and adapted to a design function. It was quick and convenient for a first prediction of the wave rotor. Second, the computational fluid dynamics (CFD) simulation was adapted so that it helped to adjust the first prediction. It provided detailed information of the wave rotor inner flow. Thirdly, an experimental method was proposed to complement the validation of the wave rotor design. This experimental method realized tracing the pressure waves and the flows in the wave rotor with measurement on pressure and temperature distributions. The critical point of the experiment is that the essential flow characteristics in the rotor were reflected by the measurements in the static ports. In all, the three steps compensated for each other in a global design procedure, and formed an applicable design method for generic cases.

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Fig. 1

Schematic diagram of a gas turbine engine topped with a four-port wave rotor: (a) engine system illustration and (b) T-s diagram of the thermal cycle

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Fig. 2

Schematic configuration of a wave rotor

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Fig. 3

Primary pressure wave system of a wave rotor. The y-coordinate can be either time or the unwrapped angular coordinate.

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Fig. 4

Relative errors of average port flow velocities as functions of the grid resolutions

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Fig. 5

Nondimensional pressure and temperature contours: (a) nondimensional pressure and (b) nondimensional temperature

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Fig. 6

Comparison on the adjusted and the unadjusted flow details: Ma variation: (a) inlet and (b) outlet

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Fig. 7

The wave rotor experimental rig: (a) solid model and (b) photograph

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Fig. 8

Schematics of test section and test points in a port. Only a few passages and a few pressure taps are illustrated in the schematics, but others are omitted for clarity.

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Fig. 9

Velocity triangles of a port

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Fig. 10

The wave rotor component for the experiments: (a) solid model and (b) photograph

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Fig. 11

Pressure distribution in accordance with the pressure contours and the primary pressure waves

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Fig. 12

Detailed comparison of pressure distribution results via different methods: (a) inlet end wall and (b) outlet end wall

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Fig. 13

Temperature distributions in the outlet ports in accordance with the rotor inner flows. The positions of (a) and (b) correspond to the positions of ports in (c).

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Fig. 14

Comparison of different wave rotor design tools: (a) precision: divergence of ηct−s and (b) time consumption

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Fig. 15

Flow chart of the wave rotor design procedure




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