[1]李锦添,江 平,等.火焰筒多斜邻接孔冷却特性数值模拟分析[J].机械与电子,2026,44(05):6-15.
　LI Jintian,JIANG Ping,et al.Numerical Simulation of Cooling Characteristics for Multi-angled Adjacent Holes in Flame Tubes[J].Machinery & Electronics,2026,44(05):6-15.
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火焰筒多斜邻接孔冷却特性数值模拟分析()
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《机械与电子》[ISSN:1001-2257/CN:52-1052/TH]

卷:
44
期数:
2026年05期
页码:
6-15
栏目:
研究与设计
出版日期:
2026-05-27

文章信息/Info

Title:
Numerical Simulation of Cooling Characteristics for Multi-angled Adjacent Holes in Flame Tubes
文章编号:
1001-2257 ( 2026 ) 05-0006-10
作者:
李锦添 1 ; 2 ; 江 平 1 ;  2 ; 王首佳 1 ;  2 ; 陈蓓蓓 1 ;  2 ; 甘天源 3 ; 李海龙 1
1. 南昌航空大学动力与能源学院,江西 南昌 330063 ;
2. 南昌航空大学绿色通用航空动力江西省重点实验室,江西 南昌 330063 ;
3. 北京航空航天大学杭州国际创新学院,浙江 杭州 311115
Author(s):
LI Jintian1 ;  2 ;  JIANG Ping1 ;  2 ;  WANG Shoujia1 ;  2 ;  CHEN Beibei1 ;  2 ;  GAN Tianyuan3 ;  LI Hailong1
( 1.College of Power and Energy Engineering , Nanchang Hangkong University , Nanchang 330063 , China ；
2.Jiangxi Key Laboratory of Green General Aviation Power , Nanchang Hangkong University , Nanchang 330063 , China ;
3.Hangzhou International Innovation Institute , Beihang University , Hangzhou 311115 , China )
关键词:
气膜冷却; 综合冷效; 流量系数; 表面传热系数比
Keywords:
film cooling ;  overall cooling effectiveness ;  flow coefficient ;  surface heat transfer coefficient ratio
分类号:
V231.1
文献标志码:
A
摘要:
为提升燃烧室火焰筒冷却性能,优化多斜邻接孔冷却结构,在冷热流温度比为 0.43 、冷热流质量流率分别为 85 m3 /h 和 580 m3 /h 、开孔率一致的条件下,采用 Fluent 软件,将火焰筒壁面平板化进行数值模拟,分析对比热侧壁面温度分布、流向及展向的沿程综合冷效 (φ )、流量系数(Cd )、流向及展向的表面传热系数比(h / h0 ),研究不同大孔孔径( D )与大孔展向中心间距( Y1 )对火焰筒壁面冷却特性的影响。结果表明:D 与 Y1 较小时能在热侧壁面快速形成连续且均匀的低温区, D 从 0.8 mm 增至 1.5 mm 后流向 φ 峰值下降 17.5% ,展向 φ 均值降低 14.5% ;与 D =0.8 mm 模型相比, D =1.4 mm 、 1.5 mm 模型的 Cd 分别提高122.2% 、 188.8% ;较小的 D 与 Y1 热侧壁面以低强度剪切涡为主,湍动能集中于近壁区域( Y <3 mm ),最大湍动能约为 95 m2 /s2 ,D 与 Y1 增大将导致气膜剪切层分离加剧,形成较大尺度肾形涡;所有模型在 0< X <20 mm 区间的流向 h / h 0 为 3.1~5.2 ,在 X =30~60 mm 区间时流向 h / h0 数值稳定在 1.5~2.1 ,反映气膜层对热流的有效隔离,D =1.3 mm 模型的展向边缘区域( Z=25~30 mm )的 h / h0 峰值可达 2.4 ,相较于 D =0.8 mm 模型的展向 h / h0 峰值升高约 14.2% 。
Abstract:
To enhance the cooling performance of the combustion chamber flame tube and optimize the cooling structure of multi-angled adjacent holes , numerical simulations were conducted using Fluent software under the conditions of coolant to mainstream temperature ratio of 0.43 , mass flow rates of 85 m3 / h and 580 m3 / h for the coolant and mainstream respectively , while maintaining consistent porosity. The flame tube wall was simplified as a flat plate for simulation.The effects of different main-hole diameters ( D ) and the spanwise center to center spacing between main holes ( Y1 ) on the cooling characteristics of the flame tube wall were investigated by analyzing and comparing the temperature distribution on the hot-side wall , the streamwise and spanwise distributions of overall cooling effectiveness ( φ ), the discharge coefficient ( Cd ), and the streamwise and spanwise surface heat transfer coefficient ratio ( h / h0 ) . The results show that smaller D and Y1 values can rapidly form a continuous and uniform low temperature zone on the hot side wall.When D increases from 0.8 mm to 1.5 mm , the peak streamwise φ decreases by 17.5% , and the spanwise average φ reduces by 14.5%.Compared to the model with D =0.8 mm , the Cd of models with D =1.4 mm and 1.5 mm increases by 122.2% and 188.8% , respectively.For smaller D and Y1 , the hot side wall is dominated by low intensity shear vortices , with turbulent kinetic energy concentrated in the near wall region ( Y <3 mm ), reaching a maximum value of approximately 95 m2 / s2 .Increasing D and Y1 intensifies the separation of the film shear layer , leading to the formation of larger scale kidney shaped vortices.For all models , the streamwise h / h0 ranges from 3.1 to 5.2 within the interval 0< X < 20 mm , and stabilizes between 1.5 and 2.1 while in the region X = 30~60 mm , indicating the effective isolation of hot gases by the film layer.In the spanwise edge region ( Z = 25~30 mm ), the model with D = 1.3 mm exhibits a peak h / h0 value of up to 2.4 , which is approximately about 14.2% higher than the peak spanwise h / h0 of the model with D = 0.8 mm.

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备注/Memo

备注/Memo:
收稿日期: 2025-12-20
基金项目:江西省研究生创新专项资金项目( YC2024-S628 )
作者简介:李锦添 ( 2000- ),男,福建诏安人,硕士研究生,研究方向为航空发动机火焰筒传热;江 平 ( 1988- ),男,湖南浏阳人,副教授,研究方向为传热、流动和燃烧,通信作者, E-mail : jiangping924@nchu.edu.cn 。
更新日期/Last Update: 2026-08-24