Qi Lei, Wang Zhitao, Zhao Ningbo, Dai Yongqiang, Zheng Hongtao, Meng Qingyang
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China.
Entropy (Basel). 2019 Mar 8;21(3):265. doi: 10.3390/e21030265.
To further improve the cycle performance of gas turbines, a gas turbine cycle model based on interstage bleeding rotating detonation combustion was established using methane as fuel. Combined with a series of two-dimensional numerical simulations of a rotating detonation combustor (RDC) and calculations of cycle parameters, the pressure gain characteristics and cycle performance were investigated at different compressor pressure ratios in the study. The results showed that pressure gain characteristic of interstage bleeding RDC contributed to an obvious performance improvement in the rotating detonation gas turbine cycle compared with the conventional gas turbine cycle. The decrease of compressor pressure ratio had a positive influence on the performance improvement in the rotating detonation gas turbine cycle. With the decrease of compressor pressure ratio, the pressurization ratio of the RDC increased and finally made the power generation and cycle efficiency enhancement rates display uptrends. Under the calculated conditions, the pressurization ratios of RDC were all higher than 1.77, the decreases of turbine inlet total temperature were all more than 19 K, the power generation enhancements were all beyond 400 kW and the cycle efficiency enhancement rates were all greater than 6.72%.
为进一步提高燃气轮机的循环性能，以甲烷为燃料建立了基于级间引气旋转爆轰燃烧的燃气轮机循环模型。结合旋转爆轰燃烧室（RDC）的一系列二维数值模拟和循环参数计算，研究了不同压缩机压比下的压力增益特性和循环性能。结果表明，与传统燃气轮机循环相比，级间引气旋转爆轰燃烧室的压力增益特性有助于显著提高旋转爆轰燃气轮机循环的性能。压缩机压比的降低对旋转爆轰燃气轮机循环的性能提升有积极影响。随着压缩机压比的降低，旋转爆轰燃烧室的增压比增加，最终使发电和循环效率提高率呈上升趋势。在计算条件下，旋转爆轰燃烧室的增压比均高于1.77，涡轮进口总温的降低均超过19K，发电增强均超过400kW，循环效率提高率均大于6.72%。
