Reheat effect on the improvement in efficiency of the turbine driven by pulse detonation

Liu, Junyu; Wang, Zhiwu; Zhang, Zixu; Li, Junlin; Qin, Weifeng; Huang, Jingjing

doi:10.1016/j.dt.2023.08.005

Cited by 1 publication

(1 citation statement)

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“…Therefore, improving the turbocharger's transient response capability is the key to improving the acceleration performance of the engine. Pulse detonation combustion approximates constant volume combustion and is characterized by a fast combustion rate and a small entropy increase [2][3][4]. It can obtain high-temperature and high-pressure working fluid in an extremely short time, provide additional energy for the exhaust gas turbocharger, promote the rapid rotation of the turbine to supply sufficient fresh air for the engine, and enable the engine to switch to the steady operation mode quickly and smoothly through the valve, injection, and other synergistic control.…”

Section: Introductionmentioning

confidence: 99%

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

Huang,

Wang,

Shi

et al. 2024

Energies

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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.

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Section: Introductionmentioning

confidence: 99%