带等压预燃的旋转爆震发动机循环效率分析

推进技术 ›› 2019, Vol. 40 ›› Issue (5): 970-977.

带等压预燃的旋转爆震发动机循环效率分析

王丹,陈宏玉,严宇,洪流

西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100,西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100,西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100,西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100

发布日期:2021-08-15

Thermal Efficiency Analysis for Isobaric Pre-Combustion Rotating Detonation Engine Cycle

Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China,Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China,Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China and Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China

Published:2021-08-15

摘要/Abstract

摘要： 针对煤油-空气旋转爆震发动机(RDE)点火困难问题，提出一种采用等压预燃的爆震循环模式。通过零维的热效率理论分析方法，建立了一种针对于带预燃的爆震热循环效率模型。结果表明，预燃爆震循环的热效率高于理想Brayton循环，低于理想爆震循环。预燃空气比例是热效率的重要影响因素，循环温比为2，预燃空气比例为0时，预燃爆震循环比理想Brayton循环热效率高26.4%，而当预燃空气量逐渐增加，预燃循环效率提升的比例逐渐变小。采用预燃方式有利于液态煤油的点火起爆，在低温比，低预燃空气比例条件下优势明显。试验中应当在保证煤油能够起爆的前提下采用尽可能少的预燃空气。

关键词: 两级燃烧；旋转爆震发动机；热效率；预燃；性能分析

Abstract: A isobaric pre-combustion rotating detonation engine(RDE)cycle was proposed to solve the ignition conundrum of kerosene and air. Thermal efficiency model of the isobaric pre-combustion detonation cycle was built by zero dimensional method. The results show that the thermal efficiency of isobaric pre-combustion detonation cycle is higher than that of ideal Brayton cycle and lower than that of ideal detonation cycle. The air ratio of isobaric pre-combustion effects on thermal efficiency greatly. When the cycle temperature ratio is 2 and the pre-combustion air ratio is 0， the thermal efficiency of pre-combustion detonation cycle is 26.4% higher than that of the ideal Brayton cycle. The thermal efficiency rising percentage of pre-combustion detonation cycle declines with air ratio increasing. Pre-combustion is conducive to liquid kerosene detonation ignition. Also pre-combustion have obvious advantages in low temperature ratio and low pre-combustion air ratio condition. As little as possible air should be used under the successful ignition premise in the experiment.

Key words: Two stage combustion；Rotating detonation engine；Thermal efficiency；Pre-combustion；Performance analysis

王丹,陈宏玉,严宇,洪流. 带等压预燃的旋转爆震发动机循环效率分析[J]. 推进技术, 2019, 40(5): 970-977.

WANG Dan,CHEN Hong-yu,YAN Yu,HONG Liu. Thermal Efficiency Analysis for Isobaric Pre-Combustion Rotating Detonation Engine Cycle[J]. Journal of Propulsion Technology, 2019, 40(5): 970-977.

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