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

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

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Due to the strong unsteadiness of pulse detonation,large flow losses are generated when the detonation wave interacts with the turbine blades,resulting in low turbine efficiency.Considering that the flow losses are dissipated into the gas as heat energy,some of them can be recycled during the expansion process in subsequent stages by the reheat effect,which should be helpful to improve the detonation-driven turbine efficiency.Taking this into account,this paper developed a numerical model of the detonation chamber coupled with a two-stage axial turbine,and a stoichiometric hydrogen-air mixture was used.The improvement in turbine efficiency attributable to the reheat effect was calculated by comparing the average efficiency of the stages with the efficiency of the two-stage turbine.The research indicated that the first stage was critical in suppressing the flow unsteadiness caused by pulse deto-nation,which stabilized the intake condition of the second stage and consequently allowed much of the flow losses from the first stage to be recycled,so that the efficiency of the two-stage turbine was improved.At a 95％confidence level,the efficiency improvement was stable at 4.5％-5.3％,demonstrating that the reheat effect is significant in improving the efficiency of the detonation-driven turbine.

Pulse detonation turbine engineHydrogen detonationTurbine efficiencyReheat effectMulti-cycle detonation

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

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School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China

Shenzhen Research Institute of Northwestern Polytechnical University,Shenzhen 518057,China

Mechanical Engineering College,Xi'an Shiyou University,Xi'an 710065,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shaanxi Province of ChinaNatural Science Foundation of Shaanxi Province of ChinaGuangdong Basic and Applied Basic Research FoundationPractice and Innovation Funds for Graduate Students of Northwestern Polytechnical University

12372338U22412722023-JC-YB-3522022JZ-202023A1515011663PF2023010

2024

10.1016/j.dt.2023.08.005

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.(1)
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