Large eddy simulation (LES) of nonreacting turbulent flow in a multiswirler model combustor is carried out at elevated pressure and high temperature. Flow interaction between the main stage and the pilot stage is discussed based on the time-averaged and instantaneous flowfield. Flow dynamics in the multiswirling flow are analyzed using a phase-averaged method. Proper orthogonal decomposition (POD) is used to extract dominant flow features in the multiswirling flow. Numerical results show that the main stage and the pilot stage flows interact with each other generating a complex flowfield. Flow interaction can be divided into three regions: converging region, merging region, and combined region. A precessing vortex core (PVC) is successfully captured in the pilot stage. PVC rotates with a first dominant frequency of 2756 Hz inducing asymmetric azimuthal flow instabilities in the pilot stage. POD analyses for the velocity fields also show dominant high-frequency modes (mode 1 and mode 2) in the pilot stage. However, the dominant energetic flow is damped rapidly downstream of the pilot stage such that it has a little effect on the main stage flow.
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December 2019
Research-Article
Large Eddy Simulation Study of Flow Dynamics in a Multiswirler Model Combustor at Elevated Pressure and High Temperature
Huiru Wang
No. 21 ShunXing Road,
Beijing 101304,
e-mail: jasoncombustion@126.com
Huiru Wang
Aero Engine Academy of China
,No. 21 ShunXing Road,
Beijing 101304,
China
e-mail: jasoncombustion@126.com
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Weijie Liu
Qian Yang
Ranran Xue
Huiru Wang
Aero Engine Academy of China
,No. 21 ShunXing Road,
Beijing 101304,
China
e-mail: jasoncombustion@126.com
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received December 25, 2018; final manuscript received April 20, 2019; published online May 22, 2019. Assoc. Editor: Matthew Oehlschlaeger.
J. Thermal Sci. Eng. Appl. Dec 2019, 11(6): 061019 (9 pages)
Published Online: May 22, 2019
Article history
Received:
December 25, 2018
Revision Received:
April 20, 2019
Accepted:
April 22, 2019
Citation
Liu, W., Yang, Q., Xue, R., and Wang, H. (May 22, 2019). "Large Eddy Simulation Study of Flow Dynamics in a Multiswirler Model Combustor at Elevated Pressure and High Temperature." ASME. J. Thermal Sci. Eng. Appl. December 2019; 11(6): 061019. https://doi.org/10.1115/1.4043624
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