Numerical simulation of secondary combustion affecting base flow of base bleed equipment

Yu Wen-jie; Yu Yong-gang

doi:10.11883/1001-1455(2015)01-0094-07

Volume 35 Issue 1

Feb. 2015

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Yu Wen-jie, Yu Yong-gang. Numerical simulation of secondary combustion affecting base flow of base bleed equipment[J]. Explosion And Shock Waves, 2015, 35(1): 94-100. doi: 10.11883/1001-1455(2015)01-0094-07

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Yu Wen-jie, Yu Yong-gang. Numerical simulation of secondary combustion affecting base flow of base bleed equipment[J]. Explosion And Shock Waves, 2015, 35(1): 94-100. doi: 10.11883/1001-1455(2015)01-0094-07

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Numerical simulation of secondary combustion affecting base flow of base bleed equipment

doi: 10.11883/1001-1455(2015)01-0094-07

School of Energy and Power Engineering, Nanjing University ofScience & Technology, Nanjing 210094, Jiangsu, China

Received Date: 2013-05-21
Rev Recd Date: 2013-10-22
Publish Date: 2015-01-25

Abstract

Abstract

In order to investigate the influence of secondary combustion for base flow field, a mathematical and physical model about base flow with chemical non-equilibrium for base bleed equipment is conducted. H₂-CO combustion model which consists 10 components and 25 reactions is used for secondary combustion. Two-dimensional axisymmetric equations are solved using a set of uniform numerical process methods. Simulation results agree with experiment data well. based on this, base flow field and combustion characteristics are numerically predicted. The results show that heat energy released from secondary combustion is far more than heat energy from bleed gases. Secondary combustion has a huge contribution to increase base pressure. It changes the temperature distribution of base region. Bleed gases flow into the shear layer, then combustion occurs. Some mixed gases which flow into the bottom region burn incomplete, because the oxygen is not sufficient near the bottom. Some mixed gases which flow into the downstream and main recirculation zone burn complete, because the oxygen is sufficient. The results can be used as reference for further improvement of the base bleed.
- fluid mechanics,
- secondary combustion,
- chemical non-equilibrium flow,
- base bleed,
- base flow field

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References(19)

References

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