Large Eddy Simulation of Flow Resistance and Heat Transfer Characteristics of Dual-Swirl Cooling on Turbine Blade Leading Edge

LIU Xuebin; SONG Liming; YU Boyang; TAO Zhi; LI Jun

doi:10.7652/xjtuxb202503004

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Large Eddy Simulation of Flow Resistance and Heat Transfer Characteristics of Dual-Swirl Cooling on Turbine Blade Leading Edge

更新时间：2026-01-06

- Large Eddy Simulation of Flow Resistance and Heat Transfer Characteristics of Dual-Swirl Cooling on Turbine Blade Leading Edge
- Journal of Xi’an Jiaotong University Vol. 59, Issue 3, Pages: 34-45(2025)
- 作者机构：
  
  西安交通大学能源与动力工程学院， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202503004
  CLC： TK471
- Received：15 July 2024，
  
  Online First：27 September 2024，
  
  Published：10 March 2025
- 稿件说明：
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LIU Xuebin, SONG Liming, YU Boyang, et al. Large Eddy Simulation of Flow Resistance and Heat Transfer Characteristics of Dual-Swirl Cooling on Turbine Blade Leading Edge[J]. Journal of Xi’an Jiaotong University, 2025, 59(3): 34-45.
DOI：

LIU Xuebin, SONG Liming, YU Boyang, et al. Large Eddy Simulation of Flow Resistance and Heat Transfer Characteristics of Dual-Swirl Cooling on Turbine Blade Leading Edge[J]. Journal of Xi’an Jiaotong University, 2025, 59(3): 34-45. DOI： 10.7652/xjtuxb202503004.

摘要

为了厘清双旋流腔室内的换热特性及高流阻的损失机理，在相同冲击雷诺数（

=10 000）下，采用高精度的大涡模拟数值方法对比研究了双旋流冲击冷却和传统垂直冲击冷却方式的流阻及换热特性。以时间平均的努塞尔数分布评估了冲击靶面的换热特性，以三维流线和

准则等值轮廓图分析了冲击腔室内的流动和涡系分布特征，采用综合换热系数对比评估了两种冷却方式的综合换热性能。模拟结果表明：双旋流冲击在靶面形成的高速强剪切流动是强化对流换热的主要原因，而旋流交叉流动带来的换热增强并不显著；相较于垂直冲击冷却，双旋流冲击的靶面努塞尔数分布更加均匀且高努塞尔数区沿展向分布范围更宽，前缘周向平均的努塞尔数在各个流向位置都有显著提升；双旋流冷却腔室内的中心旋流区出现了较大的流向涡量，导致中心旋流区的总压降较为显著；整个双旋流腔室的面平均努塞尔数相较于垂直冲击冷却提高了11.90%，即便在总压降提高了38.32%的情况下，其综合换热系数相比垂直冲击冷却仍提高了0.42%。

Abstract

To clarify the heat transfer characteristics and the losses mechanisms of high-flow resistance within a dual-swirl chamber

a high-precision large eddy simulation numerical method is used to comparatively study the flow resistance and heat transfer characteristics of dual-swirl impingement cooling and traditional vertical impingement cooling under the same impingement Reynolds number (

=10 000). The heat transfer characteristics on the impingement target surface are evaluated based on time-averaged Nusselt number distribution. The flow and vortex distribution characteristics inside the impingement chamber are analyzed using three-dimensional streamlines and

-criterion contour maps. The comprehensive heat transfer coefficient is used to compare and evaluate the overall heat transfer performance of the two cooling methods. The results indicate that the high-speed strong shear flow formed on the target surface by dual-swirl impingement is the main reason for enhancing convective heat transfer

while the heat transfer enhancement brought by the swirling cross flow is not

significant. Compared to vertical impingement cooling

the Nusselt number distribution on the target surface of dual-swirl impingement is more uniform

and the high Nusselt number region has a wider distribution range along the spanwise direction. The circumferentially averaged Nusselt number at the leading edge is significantly increased at various flow positions. A large axial vorticity appears in the central swirling region of the dual-swirl cooling chamber

leading to a significant total pressure drop in this region. The area-averaged Nusselt number of the entire dual-swirl chamber is increased by 11.90% compared to vertical impingement cooling. Even with a 38.32% increase in total pressure drop

the comprehensive heat transfer coefficient is improved by 0.42% compared to vertical impingement cooling.

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