径向冷却通道长度对气冷稳定器气动热力性能的影响

推进技术 ›› 2018, Vol. 39 ›› Issue (2): 308-316.

径向冷却通道长度对气冷稳定器气动热力性能的影响

罗一夫¹,刘友宏¹,李江宁²,徐兴平²,张志学²

北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,中航工业沈阳发动机设计研究所，辽宁沈阳 110015,中航工业沈阳发动机设计研究所，辽宁沈阳 110015,中航工业沈阳发动机设计研究所，辽宁沈阳 110015

发布日期:2021-08-15
作者简介:罗一夫，男，博士生，研究领域为加力燃烧室气动热力学。

Effects of Radial Cooling Channel Length on Aero-Thermodynamic Performance of Air Cooled Flameholder

School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China,School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China,AVIC Shenyang Engine Design and Research Institute，Shenyang 110015，China,AVIC Shenyang Engine Design and Research Institute，Shenyang 110015，China and AVIC Shenyang Engine Design and Research Institute，Shenyang 110015，China

Published:2021-08-15

摘要/Abstract

摘要： 为了获得冷态下径向冷却通道长度对新型跨流式气冷稳定器气动热力性能的影响，基于Navier-Stokes方程，对在额定工况下5组不同径向冷却通道长度的该气冷稳定器模型进行了三维流固耦合传热数值模拟研究，得到了气冷稳定器外部流场、径向稳定器外壁面的冷却效率、加力燃烧室热混合效率和总压恢复系数的变化规律。在研究的参数范围内，结果表明:径向冷却通道长度的增加，首先，加强了气冷稳定器后的湍流掺混，使得回流区内湍动能极大值增加了24.3%；其次，会减弱径向稳定器近中心锥处的外壁面冷却效果，导致径向稳定器迎风侧外壁面平均冷却效率降低了14.4%；随着径向冷却通道长度的增加，加力燃烧室沿程热混合效率分布曲线随之向上移动；加力燃烧室沿程总压恢复系数分布曲线随之向下移动，加力燃烧室出口总压恢复系数下降了0.23%。

关键词: 径向冷却通道长度；气冷稳定器；冷态流场；冷却性能；热混合效率；流动损失

Abstract: To study radial cooling channel length changing impact on a new cross-flow type air cooled flameholder in cold flow field， based on the work condition in afterburner， using Navier-Stokes equations the 3D fluid-solid coupling heat transfer models of five air cooled flameholders with different radial cooling channel length were simulated. The external flow field of air cooled flameholder， the cooling efficiency of the outer wall surface of the radial flameholder， the thermal mixing efficiency and the total pressure recovery coefficient of the afterburner changing law were obtained. Within the range of parameter in this study， results indicate that the increase of the radial cooling channel length firstly enhances the turbulence mixing after the air cooled flameholder， so that the maximum of turbulent kinectic energy in the recirculation zone increases by 24.3%， and secondly weakens the cooling effect of the outer wall surface of the radial flameholder near the inner cone， resulting in the average cooling effect decreases of 14.4% on the radial flameholder’s windward side. Due to the increase of the radial cooling channel， thermal mix efficiency distribution curve along the afterburner moves upward， total pressure recovery coefficient distribution curve along the afterburner moves downward， and total pressure recovery coefficient at outlet of afterburner decreases by 0.23%.

Key words: Radial cooling channel length；Air cooled flameholder；Cold flow field；Cooling performance；Thermal mixing efficiency；Flow loss

罗一夫,刘友宏,李江宁,徐兴平,张志学. 径向冷却通道长度对气冷稳定器气动热力性能的影响[J]. 推进技术, 2018, 39(2): 308-316.

LUO Yi-fu¹,LIU You-hong¹,LI Jiang-ning²,XU Xing-ping²,ZHANG Zhi-xue². Effects of Radial Cooling Channel Length on Aero-Thermodynamic Performance of Air Cooled Flameholder[J]. Journal of Propulsion Technology, 2018, 39(2): 308-316.

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