层板冷却结构典型参数对流动换热特性分析

宋伟; 王建华; 姚然; 李岳峰

doi:10.13224/j.cnki.jasp.20230017

层板冷却结构典型参数对流动换热特性分析

doi: 10.13224/j.cnki.jasp.20230017

宋伟^{1, 2},
王建华¹,
姚然^1,*, ,,
李岳峰¹

1.
中国科学技术大学热科学和能源工程系，合肥 230026
2.
中国航发沈阳发动机研究所，沈阳 110015

基金项目: 国家自然科学基金（U22B20135）

详细信息

作者简介:
宋伟（1987-），女，高级工程师，硕士，主要从事涡轮叶片冷却设计研究

通讯作者:
姚然（1992-），男，副研究员，博士，主要从事气冷涡轮叶片流动换热机理及设计研究。E-mail：yaoran@ustc.edu.cn

中图分类号: V231
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- 被引次数: 0
出版历程
- 收稿日期: 2023-01-08
- 网络出版日期: 2024-07-24

Influence of typical parameters in laminated cooling structure on flow and heat transfer behaviors

SONG Wei^{1, 2},
WANG Jianhua¹,
YAO Ran^{1,*
, ,},
LI Yuefeng¹

1.
Department of Thermal Science and Energy Engineering，University of Science and Technology of China，Hefei 230026，China
2.
Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China

摘要

摘要:
通过数值模拟方法对8种层板结构进行气热耦合计算，优选低雷诺数shear stress transport（SST）k-ω 湍流模型，其平均努塞尔数与冷却效果实验差异只有0.15%。研究冲击孔和气膜孔开孔率、扰流柱堵塞比、气膜孔孔型和排列形式对层板结构的流阻换热影响。结果显示对流阻影响明显的层板内冷参数依次为扰流柱堵塞比、冲击孔开孔率，层板燃气侧流阻影响排序依次为气膜孔孔型、气膜孔开孔率；对换热效果影响大的4个层板设计要素依次为气膜孔孔型、气膜孔开孔率、冲击孔开孔率、扰流柱换热面积。以比1-2-4层板模型更低的流阻损失系数和更高冷却效果为设计目标，获得适用于涡轮叶片前缘高温、低供气压比区域的1-9-5型层板单元，将其应用于目前工程设计的超强冷却叶片前缘，可将涡轮叶片耐温能力有效提升140 K。
- 结构设计 /
- 典型层板单元 /
- 流阻特性 /
- 综合冷却效果 /
- 涡轮叶片设计
Abstract:
Numerical simulation of fluid and solid zones was carried out to obtain heat transfer and temperature of eight different laminate configurations. The low Reynolds number shear stress transport (SST) k-ω turbulence model was selected. The relative error between the surface average Nusselt number and the cooling effect experiment was only 0.15%. The influences of the porosity of impingement and film holes, blockage ratio of the ribs, the film hole shape, and film cooling arrangement mode on heat transfer behaviors were studied. For flow resistance, in the interior, the influence level of rib blocking ratio was higher than the impingement hole opening rate; whereas in the gas side, the film hole type was more important than the film porosity. The comprehensive influence levels ranked as film hole type, film porosity, impingement hole opening rate and heat transfer area of the rib. To decrease friction loss coefficient and increase cooling efficiency, the 1-9-5 laminate unit more suitable than the 1-2-4 laminate model for the high temperature environment and low coolant supply pressure ratio at the leading edges of turbine blades was obtained, which can effectively increase the blade temperature by 140 K.
- structure design /
- typical laminate models /
- resistance characteristics /
- comprehensive cooling effect /
- turbine blade design

HTML

图 1 8种层板单元结构

Figure 1. Eight laminated structures

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图 2 层板换热

Figure 2. Heat transfer in lamilloy

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图 3 计算模型的网格划分

Figure 3. Grid of computation model

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图 4 6种湍流模型数值结构与实验对比

Figure 4. Comparisons between experiment and numerical results using 6 turbulence models

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图 5 层板单元流阻特性曲线

Figure 5. Flow resistance curves of lamilloy models

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图 6 流阻损失系数随雷诺数变化

Figure 6. Flow resistance coefficients varying with Re

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图 7 1-9-4系列与1-2-4基准模型对比

Figure 7. Comparison between 1-9-4 series and 1-2-4 model

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图 8 1-9-5系列与1-2-4基准模型对比

Figure 8. Comparison between 1-9-5 series and 1-2-4 model

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图 9 1-9-3系列与1-9-5_R0.8模型对比

Figure 9. Comparison between 1-9-3 series and 1-9-5_R0.8 model

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图 10 1-9-3系列与1-2-4基准模型对比

Figure 10. Comparison between 1-9-3 series and 1-2-4 model

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图 11 冷气焓增对比

Figure 11. Comparison of flow enthalpy

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图 12 综合冷却效果曲线

Figure 12. Flow cooling efficiency curves

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表 1 层板单元几何参数（D=1 mm）

Table 1. Geometrical parameters of laminated structures （D=1 mm）

模型	D_i/D	D_r/D	D_f/D
1-2-4	1	1.296	0.372
1-9-5_R0.7	1	0.7	0.372
1-9-5_R0.8	1	0.8	0.372
1-9-4_R0.5	1.2	0.5−0.8（×3）−0.5*	0.43
1-9-4_Sym	1.2	0.8	0.43
1-9-4_Asym	1.2	0.8	0.43
1-9-3	1	0.8	0.43
1-9-3_FS	1	0.8	0.43
注：*数据的含义是中间3排绕流柱的直径为0.8 mm，边上左右两排扰流柱的直径为0.5 mm。

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表 2 模型开孔率和堵塞比

Table 2. Surface porosity and blocking ratio of models

模型	A_i/A₀	A_f/A₀	A_r/A₀	A_rsa/A₀
1-2-4	0.032	0.033	0.114	0.352
1-9-5_R0.7	0.023	0.033	0.114	0.641
1-9-5_R0.8	0.023	0.033	0.147	0.733
1-9-4_R0.5	0.032	0.033	0.107	0.611
1-9-4_Sym	0.032	0.033	0.147	0.733
1-9-4_Asym	0.032	0.033	0.147	0.733
1-9-3	0.023	0.025	0.147	0.733
1-9-3_FS	0.023	0.050	0.147	0.733

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表 3 网格无关性验证

Table 3. Confirmation of grid independence

工况	网格数/万	Nu
Case 1	200	39.7
	350	32.1
	450	31.2
	550	30.7
Case 4	200	63.4
	350	54.5
	450	53.2
	550	52.6

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