Flow field characteristics of the mixing vane in the fuel rod bundle region of a pressurized water reactor

Xiaoqing CHEN; Guangliang CHEN; Hao QIAN; Lin SUN; Qian LI; Yi HU; Teng YI; Dalin ZHANG

doi:10.11889/j.0253-3219.2025.hjs.48.240292

NUCLEAR TECHNIQUES, Volume. 48, Issue 3, 030605(2025)

Flow field characteristics of the mixing vane in the fuel rod bundle region of a pressurized water reactor

Xiaoqing CHEN1... Guangliang CHEN1,2,*, Hao QIAN2, Lin SUN3, Qian LI4, Yi HU4, Teng YI5 and Dalin ZHANG1 |Show fewer author(s)

Author Affiliations

¹School of Energy and Power Engineering, Xi'an Jiao tong University, Xi'an 710049, China

²School of Nuclear Science and Technology, Harbin Engineering University, Harbin 150001, China

³China Academy of Atomic Energy Sciences, Beijing 101100, China

⁴China Three Gorges Group Co., Ltd., Wuhan 430010, China

⁵China Changjiang Electric Power Co., Ltd., Wuhan 430014, China

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Figures & Tables(18)

Fig. 1. Geometric model^[15] (a) Overall computational model, (b) Front and side views of the mixing vane

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Fig. 2. Mixing vane Geometric model^[15] (a) Differences between different mixing wings, (b) 16 mixing vanes models

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Fig. 3. Diagram of non mixing vane geometric model^[17]

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Fig. 4. Grid types^[17](a) Hexa-prism1, (b) Hexa-prism2, (c) Hexa-prism3

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Fig. 5. Verification of grid independence^[17]

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Fig. 6. Verification of grid independence for region surrounding the mixing vane^[17]

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Fig. 7. Validation of lateral flow status^[17]

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Fig. 8. Parameter distribution of the first type of heat transfer boundary condition (color online) (a) Total pressure distribution one, (b) Total pressure distribution two, (c) Transverse flow velocity distribution one, (d) Transverse flow velocity distribution two, (e) Maximum temperature distribution one, (f) Maximum temperature distribution two, (g) The average parameter distribution of the algorithm

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Fig. 9. Parameter distribution of the second type of heat transfer boundary condition (color online) (a) Total pressure distribution one, (b) Total pressure distribution two, (c) Transverse flow velocity distribution one, (d) Transverse flow velocity distribution two, (e) Maximum temperature distribution one, (f) Maximum temperature distribution two, (g) The average parameter distribution of the algorithm

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Fig. 10. Comparison of two boundary condition parameters

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Fig. 11. Diagram of optimal mixing vane structure(a) Three-dimensional drawing of the mixing vane, (b) Two-dimensional view of the mixing vane

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Fig. 12. Flow field data for optimal mixing vane structure(a) Average total pressure comparison, (b) Crossflow velocity comparison

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Fig. 13. Distribution of axial parameters downstream of mixing vanes (color online)(a) Total pressure distribution one, (b) Total pressure distribution two, (c) Transverse flow velocity distribution one, (d) Transverse flow velocity distribution two, (e) Maximum temperature distribution one, (f) Maximum temperature distribution two

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Table 1. Factor and level^[15]

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Table 1. Factor and level^[15]

因素水平 Factor Level	0	1	2	3
搅混翼角度 Mixing vane angle / (°) (A)	57	62	67	72
搅混翼长度P Mixing vane length / mm (B)	9.0	9.3	9.6	9.9
圆心坐标n Center coordinate / mm (C)	0.3	0.6	0.9	1.2
圆心坐标m Center coordinate / mm (D)	9.5	9.0	8.5	8.0

Table 2. Design scheme

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Table 2. Design scheme

设计方案 Design scheme	搅混翼角度α Mixing vane angle / (°)	搅混翼长度P Mixing vane length / mm	圆心坐标n Center coordinate / mm	圆心坐标m Center coordinate / mm
1	57	9.0	0.3	9.5
2	57	9.3	0.6	9.0
3	57	9.6	0.9	8.5
4	57	9.9	1.2	8.0
5	62	9.0	0.6	8.5
6	62	9.3	0.3	8.0
7	62	9.6	1.2	9.5
8	62	9.9	0.9	9.0
9	67	9.0	0.9	8.0
10	67	9.3	1.2	8.5
11	67	9.6	0.3	9.0
12	67	9.9	0.6	9.5
13	72	9.0	1.2	9.0
14	72	9.3	0.9	9.5
15	72	9.6	0.6	8.0
16	72	9.9	0.3	8.5

Table 3. Weight calculation results

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Table 3. Weight calculation results

试验号

Test number

指标变异性

Indicator variability

指标冲突性

Conflicting indicators

信息量

Volume of information

客观权重

Objective weighting

横流速度

Transverse flow velocity

0.326

1.198

0.390

0.410

最大温度

Maximum temperature

0.275

1.694

0.321

0.338

压降

Pressure drop

0.290

0.827

0.240

0.252

Table 4. Experimental plan and analysis of experimental results

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Table 4. Experimental plan and analysis of experimental results

试验号 Test number	因数A Factor A	因数B Factor B	因数C Factor C	因数D Factor D	误差 Inaccuracy	综合得分 Aggregate score
1	0	0	0	0	0	0.704
2	0	1	1	1	1	0.778
3	0	2	2	2	2	0.803
4	0	3	3	3	3	0.749
5	1	0	1	2	3	0.706
6	1	1	0	3	2	0.700
7	1	2	3	0	1	0.743
8	1	3	2	1	0	0.746
9	2	0	2	3	1	0.659
10	2	1	3	2	0	0.667
11	2	2	0	1	3	0.642
12	2	3	1	0	2	0.090
13	3	0	3	1	2	0.589
14	3	1	2	0	3	0.526
15	3	2	1	3	0	0.311
16	3	3	0	2	1	0.603
$k_{0}$	0.759	0.665	0.662	0.516	0.607	—
$k_{1}$	0.724	0.668	0.471	0.689	0.696	—
$k_{2}$	0.515	0.625	0.684	0.695	0.546	—
$k_{3}$	0.507	0.547	0.687	0.605	0.656	—
极差Extremely poor	1.005	0.483	0.863	0.716	0.601	—
因数主→次 Factors primary→secondary	ACDB
最优方案Preferred option	A₀C₃D₂B₁

Table 5. Analysis of variance

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Table 5. Analysis of variance

因素 Factor	离差平方和SS Sum of squared deviations	自由度 df Degrees of freedom	均方MS Mean square	F值 F value	显著性 Significance
A C D	0.215	3	0.072	4.864	*
	0.085	3	0.043	2.927	—
	0.129	3	0.028	1.929	—
$\begin{array}{l} B \\ E r r o r e \end{array}\} e^{Δ}$	$\begin{array}{l} 0.038 \\ 0.050 \end{array}\} 0.088$	$\begin{array}{l} 3 \\ 3 \end{array}\} 6$	0.015	—	—
$\begin{array}{l} B \\ E r r o r e \end{array}\} e^{Δ}$	$\begin{array}{l} 0.038 \\ 0.050 \end{array}\} 0.088$	$\begin{array}{l} 3 \\ 3 \end{array}\} 6$	0.015	—	—
总计Aggregate	0.517	15	—	—	—

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Xiaoqing CHEN, Guangliang CHEN, Hao QIAN, Lin SUN, Qian LI, Yi HU, Teng YI, Dalin ZHANG. Flow field characteristics of the mixing vane in the fuel rod bundle region of a pressurized water reactor[J]. NUCLEAR TECHNIQUES, 2025, 48(3): 030605

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