| 当量比对圆盘结构下旋转爆震波传播的影响 |
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| 作者姓名： | 夏镇娟 马虎 葛高杨 卓长飞 周长省 |
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| 作者单位： | 南京理工大学机械工程学院, 江苏南京210094;南京理工大学机械工程学院, 江苏南京210094;南京理工大学机械工程学院, 江苏南京210094;南京理工大学机械工程学院, 江苏南京210094;南京理工大学机械工程学院, 江苏南京210094 |
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| 基金项目： | 国家自然科学基金(51606100,11602109,11504173);江苏省自然科学基金(BK20150782);中央高校基本科研业务专项资金资助(30915118836) |
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| 摘 要： | 为研究反应物当量比对旋转爆震波传播过程的影响，在圆盘形旋转爆震发动机上进行H2/air的旋转爆震实验研究，并统计分析了当量比对爆震波传播模态及参数的影响规律.实验结果表明，固定质量流率，同一种传播模态下，随着当量比的增大，爆震波的压力峰值及传播速度增大，且旋转爆震波的传播过程更加稳定.不同质量流率条件下，当量比对传播模态的影响规律不同.空气质量流率小于100 g/s时，旋转爆震波皆以单波模态传播.空气质量流率大于150 g/s时，随着当量比的增大，旋转爆震波的传播模态由单波模态向双波模态转变，再转变为不对称双波模态，最后又回到单波模态.并且在不对称双波模态中发现了低频振荡现象，振荡频率约为300 Hz.质量流率继续增大，燃烧室中发现了同向三波传播模态.随着质量流率的增加，双波模态的当量比下限降低，不对称双波模态的当量比上限增大，而双波与不对称双波模态的分界线受质量流率的影响较小.
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| 关 键 词： | 旋转爆震波 当量比 传播模态 爆震波参数 圆盘结构 |
| 收稿时间： | 2018-12-22 |
Effect of Equivalence Ratio on the Propagation of Rotating Detonation Wave in Plane-Radial Structure |
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| Authors: | XIA Zhen-juan MA Hu GE Gao-yang ZHUO Chang-fei ZHOU Chang-sheng |
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| Affiliation: | School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | H2/air rotating detonation wave(RDW) was investigated in the plane-radial rotating detonation engine by experiments.The effect of equivalence ratio on the propagation modes of the RDW and detonation-wave parameters was studied.Results show that,when the mass flow rate remains constant,the RDW pressure peak and velocity increase with the equivalence ratio increasing under one propagation mode.The RDW propagates more steadily at higher equivalence ratio.The influence of equivalence ratio on propagation mode varies with mass flow rate.When mass flow rate is less than 100 g/s,the propagation mode of RDW does not change,and the RDW propagates in single-wave mode.When mass flow rate is larger than 150 g/s,with the equivalence ratio increasing,the propagation mode of RDW converts from single-wave mode into dual-wave mode,and then changes into asymmetric dual-wave mode,and finally changes to single-wave mode again.Furthermore,the low frequency oscillation was discovered in the asymmetric dual-wave mode.The oscillation frequency is approximately 300 Hz.As the mass flow rate increases,the triple-wave mode appears in the combustor.Results also show that,with the increase of mass flow rate,the equivalence ratio lower limit of dual-wave mode decreases,and the upper limit of asymmetric dual-wave mode increases.The boundary between dual-wave mode and asymmetric dual-wave mode is weakly dependent on mass flow rate. |
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| Keywords: | rotating detonation wave equivalence ratio propagation mode detonation wave parameters plane-radial structure |
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