高温来流下U型脉冲爆震燃烧室燃烧特性试验

谭汶昊; 郑龙席; 卢杰; 王凌羿; 黄康

doi:10.13224/j.cnki.jasp.20210159

高温来流下U型脉冲爆震燃烧室燃烧特性试验

doi: 10.13224/j.cnki.jasp.20210159

1.
西北工业大学动力与能源学院，西安 710129
2.
中国空气动力研究与发展中心空天技术研究所，四川绵阳 621000

基金项目: 中央高校基本科研业务费专项资金（G2021KY05114）；中国空气动力研究与发展中心基础和前沿技术研究基金（PJD20170145）

详细信息

作者简介:
谭汶昊（1995-），男，博士生，主要从事脉冲爆震涡轮发动机控制研究。

通讯作者:
卢杰（1988-），男，副教授，博士，主要从事爆震燃烧与爆震推进研究。E-mail：lujie@nwpu.edu.cn

中图分类号: V231.2
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出版历程
- 收稿日期: 2021-04-08
- 刊出日期: 2022-03-28

Experiment on combustion characteristics of U-bend pulse detonation combustor under high temperature inlet stream

1.
School of Power and Energy，Northwestern Polytechnical University，Xi'an 710129，China
2.
Aerospace Technology Institute，China Aerodynamics Research and Development Center，Mianyang Sichuan 621000，China

摘要

摘要: 为了获得高温来流下气/液两相多循环U型脉冲爆震燃烧室（U-PDC）的燃烧特性，使用汽油/空气为燃料和氧化剂开展了相关试验研究。结果表明：当来流温度为373 K，U-PDC能够在15~38 Hz范围内稳定工作，且随着工作频率提高爆燃向爆震转变（DDT）距离缩短；在室温条件下、工作频率为15~25 Hz时，未能形成充分发展爆震波，表明高温来流可促进DDT过程。在室温条件下、工作频率为15~25 Hz时，由于U型爆震弯段内可燃混气分布不均匀，U型爆震弯段外侧监测到火焰的时间晚于U型弯段出口，当来流温度升至373 K后该现象明显改善。此外，U-PDC的点火起爆时间在3~10 ms内，且点火延迟时间是影响点火起爆时间的主要因素；U-PDC工作频率相同、来流温度从室温升高至373 K或来流温度相同、U-PDC工作频率提高时，波速随之提高，点火起爆时间缩短。
- 脉冲爆震 /
- U型脉冲爆震燃烧室 /
- 高温来流 /
- DDT（爆燃向爆震转变）距离 /
- 点火起爆时间
Abstract: In order to obtain the combustion characteristics of gas-liquid two-phase multi-cycle U-bend pulse detonation combustor （U-PDC） under high temperature inlet stream，experimental research was carried out by using gasoline and air as fuel and oxidant.The results indicated that the U-PDC can achieve stable operation at the working frequency of 15-38 Hz when the inlet temperature was 373 K，and the deflagration to detonation transition （DDT） distance was shortened when the working frequency increased.When the working frequency was 15-25 Hz，the detonation initiation failed at room temperature.The results showed that high temperature inflow can promote the DDT process.At room temperature and working frequency of 15-25 Hz，due to the uneven distribution of combustible gas in the U-bend detonation tube，the time when the flame was detected outside of the U-bend detonation tube was later than the exit of the U-bend detonation tube.When the inflow temperature increased to 373 K，the phenomenon was obviously improved.In addition，the ignition time of U-PDC was within 3-10 ms，which was greatly affected by ignition delay time.When the working frequency of U-PDC was the same and the inlet stream temperature raised from room temperature to 373 K，the wave velocity increased，and the ignition time decreased.
- pulse detonation /
- U-bend pulse detonation combustor /
- high temperature inlet stream /
- DDT （deflagration to detonation transition） distance /
- ignition and detonation time

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