无阀模式下液态燃料高频爆震燃烧组织方法

doi:10.7527/S1000-6893.2021.26245

流体力学与飞行力学

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无阀模式下液态燃料高频爆震燃烧组织方法

于潇栋¹, 王可², 朱亦圆¹, 赵明皓¹, 孙田雨¹, 郭俊睿¹, 范玮¹

1. 西北工业大学动力与能源学院, 西安 710129;
2. 西北工业大学陕西省航空动力系统热科学重点实验室, 西安 710129

收稿日期:2021-08-18 修回日期:2021-09-02 发布日期:2021-09-22
通讯作者: 王可,E-mail:wangk@nwpu.edu.cn E-mail:wangk@nwpu.edu.cn
基金资助:
国家自然科学基金（52076181，52176133）；陕西省创新能力支撑计划（2021KJXX-93）；中央高校基本科研业务费（3102019ZX024）

Combustion methods of liquid fueled high-frequency detonations in valveless scheme

YU Xiaodong¹, WANG Ke², ZHU Yiyuan¹, ZHAO Minghao¹, SUN Tianyu¹, GUO Junrui¹, FAN Wei¹

1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710129, China;
2. Shaanxi Key Laboratory of Thermal Sciences in Aeroengine System, Northwestern Polytechnical University, Xi'an 710129, China

Received:2021-08-18 Revised:2021-09-02 Published:2021-09-22
Supported by:
National Natural Science Foundation of China (52076181, 52176133); Innovation Capability Support Program of Shaanxi Province (2021KJXX-93); Fundamental Research Funds for the Central Universities (3102019ZX024)

摘要/Abstract

摘要： 无阀工作模式摆脱了机械阀门作动频率的限制，已被证实可用于脉冲爆震燃烧的高频间歇式供给，但实现的最高爆震频率不高于150 Hz。为进一步探索基于液态燃料的高频爆震燃烧组织方法，以及该工作模式实现更高频率爆震燃烧的可行性，针对无隔离和有隔离两种工作方式，实验研究了以汽油为燃料的高频爆震燃烧稳定工作的可行性，并探索了填充压力、氧气体积分数和喷注条件对高频爆震波产生和传播特性的影响。结果表明，采用汽油在无阀无隔离和无阀有隔离工作方式下均可实现高频爆震燃烧，实现的最高频率分别为300 Hz和210 Hz；无隔离工作方式下，氧气体积分数为40%和50%时对应的稳定爆震当量比范围分别为0.90~1.49和0.74~1.82；有隔离工作方式下，稳定爆震当量比范围为0.95~1.61；无阀有隔离模式可有效降低连续缓燃的发生，高频爆震稳定工作时对应的等效氧气体积分数上限为58%。无阀模式下，实现高频爆震燃烧的关键在于形成有效的隔离区，贫氧或贫油混合物可替代传统的惰性介质作为隔离气体。

关键词: 爆震, 高频, 无阀模式, 隔离气体, 液态燃料

Abstract: The valveless scheme has been verified to be able to produce high-frequency detonations because it eliminates mechanical valves, which is believed to be setting a ceiling frequency of intermittent supplies of fuel, oxidizer, and purge gas. However, the highest detonation frequency achieved under such a scheme does not exceed 150 Hz. In order to further investigate this scheme utilizing liquid fuels and its possibility to produce detonations in a higher frequency, gasoline has been employed to verify whether high-frequency detonations can be obtained with and without the purge process. The influences of filling pressure, oxygen volume fraction, and injection conditions on the initiation and propagation characteristics of high-frequency detonations have been studied experimentally. The results show that using gasoline can achieve high-frequency detonations under the valveless and purgeless scheme, and the valveless and purge scheme. The highest frequencies achieved are 300 Hz and 210 Hz respectively. When the oxygen volume fraction is 40% and 50% in the valveless and purgeless scheme, the corresponding ranges of the equivalence ratio to produce stable detonations are 0.90-1.49 and 0.74-1.82, respectively, while the range of the equivalence ratio is 0.95-1.61 in the valveless and purge scheme. It is concluded that the valveless and purge scheme can effectively reduce the appearance of deflagration, and the upper limit of the equivalent oxygen volume fraction to ensure stable operation is 58%. The key to producing high-frequency detonations is to form an effective buffer zone in valveless scheme. Oxygen-poor or fuel-poor mixtures can replace common inert gases as purge gas.

Key words: detonation, high frequency, valveless scheme, purge gas, liquid fuel

中图分类号:

V231.2

于潇栋, 王可, 朱亦圆, 赵明皓, 孙田雨, 郭俊睿, 范玮. 无阀模式下液态燃料高频爆震燃烧组织方法[J]. 航空学报, 2022, 43(12): 126245-126245.

YU Xiaodong, WANG Ke, ZHU Yiyuan, ZHAO Minghao, SUN Tianyu, GUO Junrui, FAN Wei. Combustion methods of liquid fueled high-frequency detonations in valveless scheme[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(12): 126245-126245.

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无阀模式下液态燃料高频爆震燃烧组织方法

Combustion methods of liquid fueled high-frequency detonations in valveless scheme

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