圆盘结构下旋转爆震波传播特性的实验研究

夏镇娟; 周胜兵; 马虎; 卓长飞; 周长省

doi:10.11883/bzycj-2017-0329

圆盘结构下旋转爆震波传播特性的实验研究

doi: 10.11883/bzycj-2017-0329

南京理工大学机械工程学院, 江苏南京 210094

基金项目:

国家自然科学基金项目 51606100

江苏省自然科学基金项目 BK20150782

中央高校基本科研业务费专项资金项目 30915118836

详细信息

作者简介:
夏镇娟(1991-), 女, 博士研究生

通讯作者:
卓长飞, njust203zcf@126.com

中图分类号: O381;V235.22
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出版历程
- 收稿日期: 2017-09-08
- 修回日期: 2018-01-15
- 刊出日期: 2018-09-25

Experimental study on the propagation characteristics of rotating detonation waves in the plane-radial structure

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 为研究圆盘结构下旋转爆震波的传播特性，通过改变反应物的质量流率及当量比，在非预混圆盘形旋转爆震模型发动机（rotating denonation engine，RDE）上进行实验研究。结果表明，爆震波在圆盘形RDE上成功起始并能够连续传播，得到了两种传播模态：单波模态和双波模态，在发动机工作过程中发现，集气腔与燃烧室存在相互作用。当反应物质量流率小于159.20 g/s时，旋转爆震波以单波模态稳定传播，爆震波传播频率为4.56~4.62 kHz，越靠近燃烧室外圆，爆震波的压力峰值及传播速度越大；当质量流率大于186.89 m/s时，旋转爆震波以双波模态传播，传播频率为8.59~8.64 kHz。双波传播模态经历四个阶段：起爆阶段的单波段、稳定双波段、不稳定双波段、排气阶段转单波段。当质量流率介于159.20~186.89 g/s之间时，旋转爆震波以单/双波混合模态传播。反应物当量比在1附近时，爆震波的传播过程较稳定，偏离1，爆震波传播不稳定，初始阶段起爆失败或传播过程中存在间断。
- 旋转爆震波 /
- 圆盘形燃烧室 /
- 传播模态 /
- 传播频率
Abstract: In order to study the propagating characteristics of rotating detonation waves in the plane-radial structure, experiments were carried out in a plane-radial rotating detonation engine (RDE) with a variable reactants mass flow rate and equivalence ratio. Results indicate that detonation waves initiate successfully and propagate continuously on the plane-radial RDE, leading to two kinds of propagation modes:single-wave and two-wave propagation mode. The interaction between the plenum chamber and the combustor occurs in the operating process. When the mass flow rate is less than 159.20 g/s, rotating detonation waves propagate in the single-wave mode. The propagation frequency varies from 4.56 kHz to 4.62 kHz. The pressure peak and the velocity of detonation waves increase with the decreasing distance from the outer circle. In the case of the mass flow rate larger than 186.89 g/s, detonation waves propagate in the two-wave mode and the frequency varies from 8.59 kHz to 8.64 kHz. The two-wave propagation mode undergoes four stages:the single-wave stage at the initiation, the stable two-wave stage, the unstable two-wave stage, and finally the single-wave propagation stage in the exhausting stage. When the mass flow rate varies from 159.20 g/s to 186.89 g/s, rotating detonation waves propagate in the single/two-wave mixed mode. When the equivalence ratio is close to the stoichiometric ratio, the propagation process of detonation waves is more stable. In contrast, the detonation wave propagation is unstable and there is a failing initiation at the beginning or an interruption in the propagation process when the equivalence ratio is deviated from the stoichiometric ratio.
- rotating detonation wave /
- plane-radial combustor /
- propagation mode /
- propagation frequency

HTML全文

图 1 圆盘形RDE示意图

Figure 1. Plane-radial RDE model

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图 2 燃烧室两壁面的传感器布置

Figure 2. Sensor arrangement on both sides of the combustor

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图 3 实验时序图

Figure 3. Schematic diagram of experiment time sequence

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图 4 RDE的压力曲线

Figure 4. Pressure curves of RDE

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图 5 燃烧室内的压力变化

Figure 5. Variation of pressure in the combustor

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图 6 不同燃烧室径向位置的爆震波参数

Figure 6. Detonation parameters in different radial positions of combustor

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图 7 单波传播模态下的RDW压力和频率分布

Figure 7. Pressure and frequency of RDW in single-wave propagation mode

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图 8 双波传播模态下的爆震波压力和频率分布

Figure 8. Pressure and frequency of detonation wave in two-wave propagation mode

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图 9 单、双波混合传播模态下的爆震波频率分布

Figure 9. Frequency of RDW in the transition mode (single/two-wave mode)

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图 10 质量流率对爆震波参数的影响

Figure 10. Effect of mass flow rate on detonation parameters

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图 11 不同当量比下RDW的压力曲线分布(d=102 mm)

Figure 11. Pressure distribution of RDW in different equivalence ratio(d=102 mm)

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表 1 实验工况表

Table 1. Experimental conditions

工况	H₂质量流率/(g·s^-1)	总质量流率/(g·s^-1)	当量比φ	传播模态
1	3.76	132.44	1	单波
2	4.15	146.38	1	单波
3	3.34	144.58	0.81	单波
4	4.91	146.14	1.20	单波
5	3.36	118.50	1	单波
6	4.15	119.29	1.24	单/双波
7	4.51	159.20	1	单波
8	4.91	173.05	1	单/双波
9	5.30	186.89	1	双波
10	5.69	200.74	1	双波
11	6.08	214.58	1	双波

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