Operation characteristics of miniature gas turbine with a pulse combustor

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-02-13 DOI:10.1016/j.ast.2025.110046

Takashi Sakurai, Takehiro Sekiguchi, Sora Inoue, Asuka Sato

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引用次数: 0

Abstract

To clarify the operation characteristics of a gas turbine using pressure gain combustion, a miniature gas turbine with a pulse combustor was constructed, with an operation experiment conducted. The combustor has two combustion chambers, each operating in either a pulse or constant-pressure combustion state. In the normal combustion mode, wherein the two combustion chambers are in a constant-pressure combustion state, the gas turbine operates as a Brayton cycle. In addition, the gas turbine is operated in the pulse combustion mode, with one combustion chamber operated in the pulse combustion state and the other in the constant-pressure combustion state. In the pulse combustion state, the timing of hydrogen injection and ignition was actively controlled, with regular pulse combustion of 40 cycles per second achieved under gas-turbine operating conditions. The combustion chamber and turbine inlet pressures achieved peak pressures twice as high as the outlet pressure of the compressor. However, as the combustor was connected to the turbine and compressor without valves at the inlet and outlet, the flow pulsation generated by pulse combustion considerably fluctuated the turbine rotation and stagnated the air discharge from the compressor, making its operation unstable. The thermal efficiency of the pulse combustion mode did not show a clear advantage over that of the normal combustion mode, owing to the lower adiabatic efficiency of the turbine and compressor. However, owing to the large pressure fluctuations in the combustor, the hydrogen mass flow rates in both combustion modes were different, highlighting a future research direction to make the heat input the same for performance comparison.

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.