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Resistance characteristics of labyrinth throttle based on central composite design
- NUCLEAR TECHNIQUES Vol. 49, Issue 2, Article number: 020603(2026)
- 作者机构：
1.南华大学 核科学技术学院 衡阳 421001
2.先进核能设计与安全教育部重点实验室 衡阳 421001
3.中广核研究院有限公司 深圳 518031
- 作者简介：
WU Xianfeng, male, born in 2000, graduated from University of South China with a master's degree in 2025, focusing on nuclear engineering
ZHAO Pengcheng, E-mail: zhaopengcheng1030@163.com
SHEN Mengsi, E-mail: 562297568@qq.com
- 基金信息：
DOI：10.3724/j.0253-3219.2026.hjs.49.240475
CLC： TL99Received：25 November 2024，
Revised：2025-06-29，
Published：15 February 2026
- 稿件说明：
移动端阅览
伍贤锋,余悦,王晓婷等.基于中心复合设计法的迷宫型节流件阻力特性研究[J].核技术,2026,49(02):020603.
WU Xianfeng,YU Yue,WANG Xiaoting,et al.Resistance characteristics of labyrinth throttle based on central composite design[J]. NUCLEAR TECHNIQUES,2026,49(02):020603.
伍贤锋,余悦,王晓婷等.基于中心复合设计法的迷宫型节流件阻力特性研究[J].核技术,2026,49(02):020603. DOI： 10.3724/j.0253-3219.2026.hjs.49.240475. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.240475.
WU Xianfeng,YU Yue,WANG Xiaoting,et al.Resistance characteristics of labyrinth throttle based on central composite design[J]. NUCLEAR TECHNIQUES,2026,49(02):020603. DOI： 10.3724/j.0253-3219.2026.hjs.49.240475. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.240475.
摘要
在反应堆设计和运行过程中，因回路热工水力参数的变化，需调整内部节流件的压降。迷宫型节流件能够在短距离进行大幅降压，减少流体噪音和振动，可有效控制和调节冷却剂流体的流量、压力和速度，因此被广泛应用于核电等工程领域。迷宫型节流件局部阻力系数受多因素影响，主要包括挡板数目、挡板间距和挡板高度与管道直径之比等几何参数，目前几何参数对局部阻力系数的具体影响尚不明确。为探索局部阻力系数受上述几何参数的影响程度，本文以液态金属为流体，通过数值模拟方法研究了不同迷宫型节流件模型内的速度和压降分布规律，并采用中心复合设计法分析了节流件几何参数变化对局部阻力系数的独立效应和相互效应。结果表明，在入口质量流量一定的条件下，局部阻力系数受几何参数主要影响的程度如下：挡板高度与管道直径之比>挡板数目>挡板间距，其中挡板高度与管道直径之比的影响最为显著，而挡板间距的影响可近似忽略。研究结果可为铅铋回路中迷宫型节流件的优化设计和工程应用提供一定的参考价值。
Abstract
Background
2
Labyrinth throttle can greatly reduce pressure in a short distance and reduce fluid noise and vibration
hence is widely used in engineering fields such as nuclear power to control and adjust the flow
pressure and velocity of coolant fluid
ensuring the safety and stability of nuclear power plant system. Because the thermal hydraulic parameters of the reactor are often adjusted during design and operation
the pressure drop required to be achieved through the labyrinth throttle will also be adjusted. The local resistance coefficient of labyrinth throttle is determined by many factors
including the number of baffles (
n
)
the distance between baffles (
d
) and the ratio of baffle height to pipe diameter (
C
). At present
the relationship between the local resistance coefficient of labyrinth throttle and these factors is not clear.
Purpose
2
This study aims to investigate the specific impact of geometric parameters on the local resistance coefficient
offering insights for the design of labyrinth throttling components.
Methods
2
Firstly
the labyrinth throttling parts with baffle height of 60 mm
baffle spacing of 15 mm
thickness of 10 mm and number of 20 were taken as the research object for mesh independence analysis. Subsequently
several throttles with different parameters were designed
and the distribution of flow velocity and pressure and the change of pressure drop inside the labyrinth throttle were studied. Then
according to the central composite design
15 throttles with different parameters were designed and their local resistance coefficients were calculated using computational fluid dynamics software FLUENT. Finally
the independent effect and mutual effect of different parameter changes on the local resistance coefficient were calculated
and the specific influence of geometric parameters on the local resistance coefficient was obtained.
Results
2
The calculation results show that when the inlet mass flow rate is constant
the local resistance coefficient is mainly related to the ratio of baffle height to pipe diameter and the number of baffles. The ratio of baffle height to pipe diameter plays a major role
and the baffle spacing has little effect on the local resistance coefficient. The independent effect factors of the labyrinth throttle's geometric parameters are
M
(
C
)=67.275 03
M
(
n
)=17.482 66
and
M
(
d
)=-0.592 72
while the mutual effect factors are
I
(
n
C
)=12.617 24
I
(
d
C
)=7.769 52
and
I
(
n
d
)=0.102 1.
Conclusions
2
Simulation results of this study demonstrate that the primary considerations should be the influences of the ratio of baffle height to pipe diameter and the number of baffles when designing a labyrinth throttle for liquid lead-bismuth flow to adjust its local resistance coefficient
providing a certain reference value for the optimization design and engineering application of labyrinth throttling parts in lead bismuth circuit.
关键词
Keywords
references
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