亚声速空气横流中亚/超临界煤油射流特性

刘桂桂; 林宇震; 赵硕; 王梅娟; 薛鑫; 惠鑫; 杨钰龙

doi:10.13224/j.cnki.jasp.20230756

亚声速空气横流中亚/超临界煤油射流特性

doi: 10.13224/j.cnki.jasp.20230756

刘桂桂^{1, 2},
林宇震^{2, 3},
赵硕⁴,
王梅娟⁴,
薛鑫^{2, 3,*, ,},
惠鑫^{2, 3},
杨钰龙^{2, 3}

1.
北京航空航天大学能源与动力工程学院，北京 100191
2.
北京航空航天大学航空发动机气动热力国家级重点实验室，北京 100191
3.
北京航空航天大学航空发动机研究院，北京 100191
4.
中国航发湖南动力机械研究所，湖南株洲 412002

基金项目: 国家科技重大专项（2017-Ⅲ-0005-0029）；航空发动机及燃气轮机基础科学中心重点项目（P2022-B-Ⅱ-014-001）；航空发动机及燃气轮机基础科学中心重大项目（2022-A-Ⅱ-005-001）

详细信息

作者简介:
刘桂桂（1989-），男，博士，主要从事航空发动机燃烧方面研究

通讯作者:
薛鑫（1983-），男，助理研究员，博士，主要研究领域为航空发动机燃烧室。E-mail：xinxue@buaa.edu.cn

中图分类号: V231.2
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出版历程
- 收稿日期: 2023-11-30
- 网络出版日期: 2025-05-14

Injection characteristics of sub- to super-critical kerosene in subsonic air crossflow

LIU Guigui^{1, 2},
LIN Yuzhen^{2, 3},
ZHAO Shuo⁴,
WANG Meijuan⁴,
XUE Xin^{2, 3,*
, ,},
HUI Xin^{2, 3},
YANG Yulong^{2, 3}

1.
School of Energy and Power Engineering，Beihang University，Beijing 100191，China
2.
National Key Laboratory of Science and Technology on Aero-Engine Thermodynamics，Beihang University，Beijing 100191，China
3.
Research Institute of Aero-Engine，Beihang University，Beijing 100191，China
4.
Hunan Aviation Powerplant Research Institute，Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

摘要

摘要:
对亚/超临界RP-3航空煤油在亚声速空气横流中的射流特性进行了试验研究。在恒定的空气参数与燃油质量流量条件下，采用阴影成像技术对352～750 K燃油喷射温度范围内的横向射流结构进行了可视化观测。结果表明：随着喷射温度的升高，RP-3横向射流的破碎/解体机制会由机械破碎逐步转变为未壅塞闪蒸、壅塞闪蒸和超临界机制。在此过程中，射流稠密核心和雾化区横向长度分别缩短超过11倍和52倍喷口直径，稠密核心和雾化区覆盖面积分别缩小超过6 mm²和141 mm²。此外，随着喷射温度的升高，射流穿透深度在机械破碎机制主导下逐渐增大，在未壅塞闪蒸机制下逐渐减小，在壅塞闪蒸和超临界机制下基本保持不变。
- 亚声速空气横流 /
- 超临界航空煤油 /
- 阴影成像 /
- 射流特性 /
- 射流穿透深度
Abstract:
The jet behaviors of sub- and super-critical RP-3 aviation kerosene in a subsonic air crossflow were experimentally investigated. Under constant air parameters and fuel mass flow rate conditions, shadowgraph imaging technology was used to visualize the transverse jet structure within the fuel injection temperature range of 352 K to 750 K. The results showed that the breakup/disintegration regime of RP-3 jet gradually changed from mechanical breakup to unchocked flash-boiling, chocked flash-boiling and supercritical regime as the fuel injection temperature increased. During this process, the jet dense core and atomization zone underwent a decrease in length of over 11 and 52 times the nozzle diameter, respectively, and a decrease in coverage of over 6 mm² and 141 mm², respectively. Furthermore, with the increase of the injection temperature, the penetration depth of the jet gradually increased in the mechanical breakup regime, decreased in the unchocked flash-boiling regime, and remained essentially unchanged in both the chocked flash-boiling and supercritical regimes.
- subsonic air crossflow /
- supercritical aviation kerosene /
- shadowgraph imaging /
- injection characteristics /
- jet penetration depth

HTML

图 1 当前试验装置示意图

Figure 1. Schematic of current experimental setup

下载: 全尺寸图片幻灯片

图 2 图像后处理方法

Figure 2. Image post processing method

下载: 全尺寸图片幻灯片

图 3 稠密核心边界、雾化区边界和上缘射流轨迹检测阈值敏感性分析

Figure 3. Sensitivity analysis of threshold for detecting dark red core boundary, atomization region boundary and jet trajectory

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图 4 空气横流中T_inj<T_d的RP-3射流阴影图像

Figure 4. Shadowgraph images of RP-3 jets at T_inj<T_d in air crossflow

下载: 全尺寸图片幻灯片

图 5 显示T_inj<T_d 的RP-3射流喷射路径的p-T图

Figure 5. p-T diagram with injection path for RP-3 jets at T_inj<T_d

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图 6 空气横流中未壅塞RP-3闪蒸射流阴影图像

Figure 6. Shadowgraph images of unchocked RP-3 flash-boiling jets in air crossflow

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图 7 显示未壅塞RP-3闪蒸射流喷射路径的p-T图

Figure 7. p-T diagram with injection path for unchocked RP-3 flash-boiling jets

下载: 全尺寸图片幻灯片

图 8 空气横流中壅塞RP-3闪蒸射流阴影图像

Figure 8. Shadowgraph images of chocked RP-3 flash-boiling jets in air crossflow

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图 9 显示T_inj = 597 K和660 K的RP-3射流喷射路径的s-p图和包含解体过程特征点的T_inj = 660 K射流阴影图像

Figure 9. s-p diagram with injection path for RP-3 jets atT_inj = 597 K and 660 K and shadowgraph image for jet at T_inj = 660 K including characteristic points within the disintegration process

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图 10 空气横流中超临界RP-3欠膨胀射流阴影图像

Figure 10. Shadowgraph images of supercritical RP-3 under-expanded jets in air crossflow

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图 11 带有超临界RP-3欠膨胀射流喷射路径的s-p图

Figure 11. s-p diagram with injection path for supercritical RP-3 under-expanded jets

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图 12 空气横流中RP-3射流的喷口射流宽度、核心区长度、核心区面积、雾化区长度和雾化区面积随喷射温度的变化

Figure 12. Variation of jet width at nozzle exit, core length, core area, atomization length and atomization area of RP-3 jet in air crossflow with the injection temperature

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图 13 空气横流中RP-3射流轨迹随喷射温度的变化

Figure 13. Variation of jet trajectory of RP-3 jet in air crossflow with injection temperature

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表 1 试验工况

Table 1. Test conditions

射流类型	工况序号	T_inj/K	p_inj/MPa	q
加热液态	1	352	0.416	12.5
	2	399	0.423	13.3
	3	451	0.445	15.0
	4	499	0.481	14.8
未壅塞闪蒸	5	532	0.644	15.9
	6	557	0.822	17.4
	7	575	0.822	17.8
壅塞闪蒸	8	597	1.145	18.6
	9	625	1.506	20.3
	10	647	1.960	22.1
	11	660	2.246	24.6
超临界欠膨胀	12	672	2.538	27.4
	13	682	2.745	32.9
	14	698	3.136	35.9
	15	715	3.556	39.8
	16	750	4.318	42.4

下载: 导出CSV

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