轴向通流旋转盘腔流动换热稳态实验与数值模拟

张泽群; 罗翔; 曹楠

doi:10.13700/j.bh.1001-5965.2020.0426

轴向通流旋转盘腔流动换热稳态实验与数值模拟

doi: 10.13700/j.bh.1001-5965.2020.0426

张泽群¹,
罗翔^{1, 2, ,},
曹楠¹

1.
北京航空航天大学能源与动力工程学院航空发动机气动热力国家重点实验室, 北京 100083
2.
北京航空航天大学先进航空发动机协同创新中心, 北京 100083

基金项目:

国家科技重大专项 2017-Ⅲ-0011-0037

国家自然科学基金 61890923

详细信息

通讯作者:
罗翔, E-mail: xiang.luo@buaa.edu.cn

中图分类号: V231.1;TK124
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- 被引次数: 0
出版历程
- 收稿日期: 2020-08-12
- 录用日期: 2020-08-28
- 网络出版日期: 2021-11-20

Steady-state experiment and numerical simulation on flow and heat transfer of a rotating cavity with axial flow

ZHANG Zequn¹,
LUO Xiang^{1, 2
, ,},
CAO Nan¹

1.
National Key Laboratory of Science and Technology on Aero-Engine and Aero-Thermodynamics, School of Energy and Power Engineering, Beihang University, Beijing 100083, China
2.
Collaborative Innovation Center for Advanced Aeroengine, Beihang University, Beijing 100083, China

Funds:

National Science and Technology Major Project 2017-Ⅲ-0011-0037

National Natural Science Foundation of China 61890923

More Information

Corresponding author: LUO Xiang, E-mail: xiang.luo@buaa.edu.cn

摘要

摘要:
通过开展稳态实验及数值模拟探究了轴向通流旋转盘腔的流动结构与换热特性。通过改变流量系数、旋转雷诺数等参数，探究不同工况下旋转盘两侧及盘罩内侧壁面温度和努塞尔数的径向分布规律。结果表明：在轮缘加热的状态下，旋转盘两侧温度径向分布均呈凹函数形态，且旋转盘迎风面换热强度普遍高于背风面；后轴颈盘罩向两端旋转盘导热，其壁面温度径向分布呈"中间高、两侧低"的状态；随着轴向流量系数的增大，盘腔内部气体对流加剧，径向臂及涡对结构更加明显，旋转盘及轴颈表面换热效果增强；旋转盘腔内的流动换热特性受强迫对流和类Rayleigh-Benard对流2种机理的共同影响。
- 旋转盘腔 /
- 轴向通流 /
- 后轴颈盘罩 /
- 流动结构 /
- 换热特性
Abstract:
The steady-state experiment and numerical simulation were carried out to investigate the flow structure and heat transfer characteristics in the rotating cavity with axial flow. By changing the axial flow coefficient, rotating Reynolds number, etc., the radial distribution of temperature and Nusselt number on both sides of the disk and the inner side of the disk cone under different working conditions was explored. The results show that: the radial distribution of temperature on both sides of the disk is concave, and the heat transfer intensity on the upwind side of the disk is generally higher than that on the leeward side. The cone disk conducts heat conduction to the disks on both ends, and the radial distribution of the wall surface temperature is high in the middle and low on both sides. With the increase of the axial flow coefficient, the gas convection inside the disk cavity was intensified, the radial arm and vortex pair became explicit, and the heat transfer effect on the surface of the rotating disk and the cone disk was enhanced. The flow heat transfer characteristics in the cavity of the rotating disk are influenced by forced convection and Rayleigh-Benard like convection.
- rotating cavity /
- axial flow /
- cone disk /
- flow structure /
- heat transfer characteristics

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图 1 实验系统示意图

Figure 1. Schematic of experimental system

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图 2 实验件示意图

Figure 2. Schematic of experimental device

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图 3 CFD计算模型示意图

Figure 3. Schematic of CFD model

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图 4 Bohn实验模型示意图^[4]

Figure 4. Schematic of Bohn's experimental model^[4]

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图 5 Bohn实验结果与数值计算方法验证结果对比

Figure 5. Comparisons between Bohn's experimental results and verification results of numerical calculation method

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图 6 旋转盘B两侧壁面温度径向分布测量值

Figure 6. Measured temperature radial distribution on wall surface of both sides of disk B

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图 7 后轴颈盘罩内壁温度径向分布测量值

Figure 7. Measured temperature radial distribution on inner wall of cone disk

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图 8 旋转盘腔中轴面温度分布云图

Figure 8. Temperature distribution contour on axial surface of rotating cavity

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图 9 Re_θ=1.83×10⁵下旋转盘B两侧壁面局部努塞尔数径向分布实验结果

Figure 9. Experimental results of radial distribution of local Nusselt number on wall surface of both sides of disk B with Re_θ=1.83×10⁵

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图 10 Re_θ=1.83×10⁵下旋转盘B两侧壁面平均努塞尔数径向分布

Figure 10. Radial distribution of average Nusselt number on wall surface of both sides of disk B with Re_θ=1.83×10⁵

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表 1 实验工况

Table 1. Working conditions of experiment

m/(kg·h^-1)	C_W	ω/(r·min^-1)	Re_θ
50	4 310.6	200	45 681.3
150	12 931.9	400	91 362.6
250	21 553.2	600	137 044.0
350	30 174.5	800	182 725.3
450	38 795.8
550	47 417.0
750	64 659.6

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参考文献(17)

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