期刊
APPLIED THERMAL ENGINEERING
卷 108, 期 -, 页码 567-580出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.07.114
关键词
Self-excited Helmholtz pulse combustor; Pulsating flow; Elbow tailpipe; Numerical simulation; Heat transfer
资金
- National Natural Science Foundation of China [51206032]
- China Postdoctoral Science Foundation [2013M531037]
- Heilongjiang Postdoctoral Financial Assistance [LBH-Z12101]
A valveless self-excited Helmholtz pulse combustor with an elbow tailpipe was designed. The pressures along the tailpipe and the internal and external elbow section were measured. The pulsating flow in the elbow tailpipe was numerically simulated by FLUENT. Numerical simulation results show that the mean velocity decrease with the velocity amplitude along the tailpipe. The mean and amplitude of area-averaged pressure and internal and external elbow pressure decrease along the tailpipe. The mean and amplitude of the internal elbow pressure are less than those of the external elbow pressure. The simulation results are in good agreement with the experimental data. The mass-averaged velocity-reversing, Dean vortex forming, shedding and reforming process and periodical Dean vortex shapes and vortex core positions contribute to convective heat transfer enhancement. (C) 2016 Elsevier Ltd. All rights reserved.
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