The paper presents an experimental investigation of the thermoacoustic oscillations detection in a lean premixed pre-evaporation (LPP) combustor using acoustic signals. The LPP model combustion chamber oscillation combustion test platform was designed and built; the thermal parameters signal, the acoustic signal, and the dynamic pressure signal were collected under the steady condition and the transition condition, and been analyzed comparatively. The experimental result shows that, at the same inlet air speed, the dominant frequency of the combustion chamber is proportional to the thermal load, while at the same fuel flow, the main frequency of the combustion chamber does not change with the changing of air speed. In addition, the doubling frequency of the acoustic signal is more obvious than the pressure signals, which show that the interference of the acoustic signal is less. In the transition condition, the pulse energy of the acoustic signal is obviously increased after ignition. The dominant frequency energy increases when the working condition begins to change in the stable to oscillation combustion condition. The dominant frequency energy decreases when the working condition begins to change in the oscillation to stable combustion condition. During the flameout condition, the oscillating energy begins to decay from the high frequency region. For the acoustic signal is less disturbed than the pressure signal and it can obtain the same result with the pressure signal in the oscillation condition and the transition condition, acoustic diagnostic is an auxiliary method for combustion oscillation in LPP combustor.
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December 2018
Research-Article
Acoustic Diagnostics Applications in the Study of the Oscillation Combustion in Lean Premixed Pre-Evaporation Combustor
Zilai Zhang,
Zilai Zhang
School of Mechanical Engineering,
Shanghai Jiao Tong University,
No.800 Dongchuan Road,
Minhang 200240, Shanghai, China
e-mail: zzl722@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road,
Minhang 200240, Shanghai, China
e-mail: zzl722@sjtu.edu.cn
Search for other works by this author on:
Shusheng Zang,
Shusheng Zang
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: sszang@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: sszang@sjtu.edu.cn
Search for other works by this author on:
Bing Ge,
Bing Ge
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: gebing@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: gebing@sjtu.edu.cn
Search for other works by this author on:
Peifeng Sun
Peifeng Sun
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: sunpf2013@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: sunpf2013@sjtu.edu.cn
Search for other works by this author on:
Zilai Zhang
School of Mechanical Engineering,
Shanghai Jiao Tong University,
No.800 Dongchuan Road,
Minhang 200240, Shanghai, China
e-mail: zzl722@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road,
Minhang 200240, Shanghai, China
e-mail: zzl722@sjtu.edu.cn
Shusheng Zang
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: sszang@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: sszang@sjtu.edu.cn
Bing Ge
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: gebing@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: gebing@sjtu.edu.cn
Peifeng Sun
School of Mechanical Engineering,
Shanghai Jiao Tong University,
Minhang 200240, Shanghai, China
e-mail: sunpf2013@sjtu.edu.cn
Shanghai Jiao Tong University,
No.800 Dongchuan Road
,Minhang 200240, Shanghai, China
e-mail: sunpf2013@sjtu.edu.cn
1Corresponding author.
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 6, 2017; final manuscript received February 1, 2018; published online November 28, 2018. Editor: David Wisler.
J. Eng. Gas Turbines Power. Dec 2018, 140(12): 121508 (7 pages)
Published Online: November 28, 2018
Article history
Received:
December 6, 2017
Revised:
February 1, 2018
Citation
Zhang, Z., Zang, S., Ge, B., and Sun, P. (November 28, 2018). "Acoustic Diagnostics Applications in the Study of the Oscillation Combustion in Lean Premixed Pre-Evaporation Combustor." ASME. J. Eng. Gas Turbines Power. December 2018; 140(12): 121508. https://doi.org/10.1115/1.4039463
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