Effects of Double-Arc Non-Uniform-Thickness Blades on Internal Flow Control and Aerodynamic Performance of a Multi-Blade Centrifugal Fan

PENG Xiaokang; MA Yanpeng; TIAN Chenye; JIANG Jiwu; LIU Xiaomin

doi:10.7652/xjtuxb202609017

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Effects of Double-Arc Non-Uniform-Thickness Blades on Internal Flow Control and Aerodynamic Performance of a Multi-Blade Centrifugal Fan

更新时间：2026-09-04

- Effects of Double-Arc Non-Uniform-Thickness Blades on Internal Flow Control and Aerodynamic Performance of a Multi-Blade Centrifugal Fan
- Journal of Xi'an Jiaotong University Vol. 60, Issue 9, Pages: 177-186(2026)
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
  美的集团厨房和热水事业部，528311，广东佛山
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202609017
  CLC： TH432;TK05
- Received：16 January 2026，
  
  Online First：26 March 2026，
  
  Published：10 September 2026
- 稿件说明：
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PENG Xiaokang, MA Yanpeng, TIAN Chenye, et al. Effects of Double-Arc Non-Uniform-Thickness Blades on Internal Flow Control and Aerodynamic Performance of a Multi-Blade Centrifugal Fan[J]. Journal of Xi'an Jiaotong University,2026,60 (9):177-186. https://doi.org/10.7652/xjtuxb202609017.
DOI：

PENG Xiaokang, MA Yanpeng, TIAN Chenye, et al. Effects of Double-Arc Non-Uniform-Thickness Blades on Internal Flow Control and Aerodynamic Performance of a Multi-Blade Centrifugal Fan[J]. Journal of Xi'an Jiaotong University,2026,60 (9):177-186. https://doi.org/10.7652/xjtuxb202609017. DOI：

摘要

为提升集成灶气动性能并有效降低其气动噪声，提出一种具有较高流道设计自由度且设计变量较少的多翼离心风机叶片改型设计方法。以原型风机性能较优的双圆弧等厚叶片为对象，通过计算流体力学（CFD）与响应面方法对叶片吸力面双圆弧型线进行优化设计，将等厚度叶片重构为非等厚叶片，实现多翼离心风机内部流动控制。在工作工况下，以集成灶风量和轴功率为优化目标，采用Box-Behnken响应面方法对叶片吸力面型线的进口角、出口角、拱点圆直径以及叶片数进行优化，基于设计参数和样本结果的二次回归拟合，得到最优参数组合。实验结果表明：采用优化方案的集成灶较原型机风量增加了2.53%，噪声降低了1.8 dB；CFD流场和噪声计算的可视化分析表明：优化得到的非等厚叶片的吸力面更加符合气流的流线型设计，有效抑制了叶间流道的流动分离，减弱了叶片表面的声压脉动；非等厚叶片的进、出口角与气流的进、出口气流角匹配得更好，有效降低了叶片前缘的压力脉动及叶片尾缘的尾迹流对蜗舌的非定常相互作用，从而达到了增风和降噪的目的。

Abstract

To improve the aerodynamic performance of an integrated cooking appliance and effectively reduce its aerodynamic noise

a blade modification method with greater freedom in flow-passage design and fewer design variables is proposed for its multi-blade centrifugal fan.The double-arc uniform-thickness blades with superior performance in the prototype fan are selected

and the double-arc profile of the blade suction surface is optimized using computational fluid dynamics（CFD）and response surface methodology.The uniform-thickness blades are reconstructed as non-uniform-thickness blades to achieve internal flow control of the multi-blade centrifugal fan.At the operating condition

the inlet angle

outlet angle

arch-point circle diameter of the blade suction-surface profile

and the number of blades are optimized using the Box-Behnken response surface method

with the airflow rate and shaft power of the integrated cooking appliance taken as the optimization obj ectives.The optimal parameter combination is obtained through quadratic regression fitting based on the design parameters and sample results.It is shown by the experimental results that

compared with the prototype

an increase of 2.53% in airflow rate and a reduction of 1.8 dB in noise are achieved by the integrated cooking appliance employing the optimized design.It is shown by visual analyses of the CFD flow field and aerodynamic noise calculations that the suction surface of the optimized non-uniform-thickness blades better conforms to the airflow streamlines

flow separation in the inter-blade passages is effectively suppressed

and sound pressure fluctuations on the blade surfaces are reduced.Meanwhile

the inlet and outlet angles of the non-uniform-thickness blades are better matched with the inlet and outlet flow angles.Pressure fluctuations at the blade leading edges and the unsteady interaction between the blade trailing-edge wakes and the volute tongue are effectively reduced

thereby increasing airflow and reducing noise.

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Related Institution

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美的集团厨房和热水事业部，528311，广东佛山Midea Group Kitchen and Hot Water Division, Foshan, Guangdong 528311, China

西安交通大学能源与动力工程学院，710049，西安School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Guangdong Midea Environmental Electrical Appliance Manufacturing Co., Ltd.

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