Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

Diyun Huang, Jiayong Wang, Minshuo Shi, Puze Yang and Binyang Wu ()
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Diyun Huang: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Jiayong Wang: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Minshuo Shi: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Puze Yang: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Binyang Wu: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

Energies, 2024, vol. 17, issue 11, 1-16

Abstract: Traditional exhaust-gas turbocharging exhibits hysteresis under variable working conditions. To achieve rapid-intake supercharging, this study investigates the synergistic coupling process between the detonation and diesel cycles using gasoline as fuel. A numerical simulation model is constructed to analyze the detonation characteristics of a pulse-detonation combustor (PDC), followed by experimental verification. The comprehensive process of the flame’s deflagration-to-detonation transition (DDT) and the formation of the detonation wave are discussed in detail. The airflow velocity, DDT time, and peak pressure of detonation tubes with five different blockage ratios (BR) are analyzed, with the results imported into a one-dimensional GT-POWER engine model. The results indicate that the generation of detonation waves is influenced by flame and compression wave interactions. Increasing the airflow does not shorten the DDT time, whereas increasing the BR causes the DDT time to decrease and then increase. Large BRs affect the initiation speed of detonation in the tube, while small BRs impact the DDT distance and peak pressure. Upon connection to the PDC, the transient response rate of the engine is slightly improved. These results can provide useful guidance for improving the transient response characteristics of engines.

Keywords: pulse detonation; deflagration to detonation; blockage ratio; turbine; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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