面向燃油结冰试验的饱和燃油制备数值模拟

彭炬; 谷云凤; 李杰; 刘林盛; 夹福年; 杨锦昌; 王彬

doi:10.13224/j.cnki.jasp.20220790

面向燃油结冰试验的饱和燃油制备数值模拟

doi: 10.13224/j.cnki.jasp.20220790

彭炬¹,
谷云凤¹,
李杰²,
刘林盛²,
夹福年¹,
杨锦昌¹,
王彬^2,*, ,

1.
中国航发四川燃气涡轮研究院，四川绵阳 621703
2.
南京航空航天大学能源与动力学院，南京 210016

基金项目: 中国航发四川燃气涡轮研究院稳定支持项目（GJCZ-2021-0043）

详细信息

作者简介:
彭炬（1984-），男，高级工程师，博士生，主要从事航空发动机高空模拟试验技术研究

通讯作者:
王彬（1978-），男，副教授，博士，研究领域为航空燃油系统及执行机构技术。E-mail：binwang@nuaa.edu.cn

中图分类号: V233.2
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出版历程
- 收稿日期: 2022-10-14
- 网络出版日期: 2024-04-26

Numerical simulation of saturated fuel preparation for fuel icing tests

1.
Sichuan Gas Turbine Establishment，Aero Engine Corporation of China，Mianyang Sichuan 621703，China
2.
College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
为研究燃油结冰试验中饱和燃油含水量的影响规律，以达到适航标准要求的油水均匀度，提出对配水循环系统进行数值模拟。运用欧拉-拉格朗日法分别表示连续项与离散项，用离散相模型（discrete phase model，DPM）模拟水粒子的碰撞、融合和破碎。对液滴喷射与水-燃油两相流循环进行仿真计算，研究注水位置、循环泵后压力及液流进出排布对燃油含水量的影响规律。基于循环系统内不同区域离散项质量浓度的取样统计，分析适航标准规定时间内水与燃油混合情况。利用燃油配水装置进行了泵压式循环注水试验，实测不通过油水分离器循环的泵后燃油含水量。结果表明：测量结果与数值模拟基本吻合，液流进出口设于油箱同侧且在泵后管路注水时循环掺混效果好。0.2 MPa泵后压力时油水混合均匀，且含水量可保持在适航标准规定的90×10⁻⁶～130×10⁻⁶范围内。
- 燃油结冰 /
- 含水量 /
- 离散项 /
- 管路布局 /
- 泵后压力
Abstract:
In order to study the influence rules of water content in saturated fuel for fuel icing tests, and find the way to meet airworthiness requirement on fuel-water homogeneity, numerical simulation of water injection and circulation system was proposed. Euler-Lagrange algorithm represented continuous and discrete terms respectively, and discrete phase model (DPM) simulated the collision, fusion and fragmentation of water particles. Water droplet spray and water-fuel two-phase flow cycle was simulated, to examine effects of injection position, pressure of the pump outlet and in/out arrangement of fluid on the water content in the fuel. Based on statistical sampling on the mass concentration of the discrete terms for different regions in the cycle system, water-fuel mixing within the prescribed time by the airworthiness standard was analyzed. Water injection experiment for the fuel cycle was conducted by using water distribution apparatus, and the water content in the cycle fuel without passing through the fuel-water separator was measured. The results showed that, the measured results were in good agreement with the numerical simulation. The circulating mixing exhibited excellent effect when the inlet and the outlet of the liquid flow were on the same side of the tank or water was injected into the downstream pipe of the pump. Moreover, fuel-water mixing was uniform at 0.2MPa pump outlet pressure, and stable water content was kept within the range of 90×10^-6 to 130×10^-6 specified by the airworthiness standard.
- fuel icing /
- water content /
- discrete items /
- piping layout /
- pump-outlet pressure

HTML

图 1 燃油循环系统及划分

Figure 1. Fuel cycle system and division

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图 2 含水燃油宜采样区域

Figure 2. Sampling area of water-bearing fuel

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图 3 划定区域内的质量浓度

Figure 3. Mass concentration in delimited area

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图 4 循环管路注水水粒子跟踪

Figure 4. Water particle tracking in cycle pipeline

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图 5 进油端注水DPM浓度

Figure 5. DPM concentration of water injection in fuel inlet section

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图 6 饱和油箱顶部注水DPM浓度

Figure 6. DPM concentration for water injection to top of saturated fuel tank

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图 7 循环管路注水DPM浓度

Figure 7. DPM concentration of water injection in cycle line

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图 8 循环系统燃油含水量（进出口同侧）

Figure 8. Water content in fuel of cycle system （for one-side in/out port）

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图 9 循环系统燃油含水量（进出口异侧）

Figure 9. Water content in fuel of cycle system（for two-side in/out port）

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图 10 泵后压力为0.1MPa油箱的DPM浓度

Figure 10. DPM concentration of tank for 0.1MPa pump-outlet pressure

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图 11 泵后压力为0.3 MPa油箱的DPM浓度

Figure 11. DPM concentration of tank for 0.3 MPa pump-outlet pressure

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图 12 试验装置原理图

Figure 12. Schematic diagram of experiment setup

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图 13 饱和燃油制备试验装置

Figure 13. Experiment setup for saturated fuel preparation

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表 1 油箱横向分区离散项质量浓度

Table 1. Mass concentration of discrete term in lateral region of fuel tank

横向分区/mm	统计数量		离散项质量浓度/（kg/m³）
横向分区/mm	网格尺寸为4 mm	网格尺寸为2 mm	网格尺寸为 4 mm	网格尺寸为2 mm
0～13	85	370	0.986	4.366
13～16	66	360	0.911	5.292
26～39	78	429	0.998	5.663
39～52	98	354	1.205	4.567
52～65	102	449	1.091	5.164

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表 2 泵后某截面燃油含水量

Table 2. Water content in fuel at a pump outlet section

时间/min	试验含水量	仿真含水量	误差/%	时间/min	试验含水量	仿真含水量	误差
5	73.85	66.71	9.67	20	127.36	132.08	3.71
6	78.21	70.49	9.87	22	128.57	131.55	2.32
7	84.61	80.15	5.27	24	126.43	121.99	3.51
8	90.15	88.30	2.05	26	131.69	127.36	3.33
9	95.76	93.01	2.87	28	128.81	131.21	1.86
10	98.33	95.59	2.79	30	127.94	122.84	3.99

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