对转盘腔换热特性数值研究

推进技术 ›› 2018, Vol. 39 ›› Issue (12): 2813-2819.

对转盘腔换热特性数值研究

权剑,罗翔,彭于博,胡彦文

北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100083,北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100083,北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100083,北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100083

发布日期:2021-08-15
作者简介:权剑，男，硕士生，研究领域为航空发动机涡轮盘热防护。E-mail: quanjian@buaa.edu.cn 通讯作者:罗翔，男，博士，教授，研究领域为航空发动机旋转部件的流动与换热。

Numerical Study of Heat Transfer Characteristics Inside Counter-Rotating Disk Cavity

National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics，School of Energy and Power Engineering，Beihang University，Beijing 100083，China,National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics，School of Energy and Power Engineering，Beihang University，Beijing 100083，China,National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics，School of Energy and Power Engineering，Beihang University，Beijing 100083，China and National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics，School of Energy and Power Engineering，Beihang University，Beijing 100083，China

Published:2021-08-15

摘要/Abstract

摘要： 航空发动机中对转涡轮设计使得对转盘腔内冷气的流动和换热问题被关注。为探究对转盘腔的换热特性及其影响因素，对几何简化后的中心进气对转盘腔模型进行流-热-固耦合数值模拟。结果表明:下游盘换热效果强于上游盘；冷气流量的增大对两盘换热均有显著增强作用，当流量增加一倍时平均努赛尔数升高幅度超过70%；轮盘转速的提高只会增强转速改变轮盘的换热，对另一个转速不变轮盘的换热影响不大；在间隙比G=0.1～0.4，两盘间隙的减小增强上游盘的换热，对下游盘换热影响不大。

关键词: 对转盘腔；换热；努塞尔数；数值模拟；湍流模型

Abstract: With the application of counter-rotating turbine technology in aero-engine， the flow and heat transfer characteristics inside the counter-rotating disk cavity has received concern. To study the heat transfer characteristics inside the counter-rotating disk cavity and its relevant factors， a fluid-thermal-solid coupling simulation of a geometry simplified counter-rotating disk cavity with central inflow was conducted. The results indicated that the heat transfer effect of downstream disk is stronger than that of upstream disk. When the cooling air mass flow increases， the heat transfer effect of two disks is enhanced greatly， the average Nusselt number enhances by more than 70% with the mass flow doubled. When the rotational speed of one disk increases， the heat transfer effect of the disk under rotating variation is enhanced obviously， but the effect is barely observed for the other disk. In the gap radio range of G=0.1～0.4， when the gap of two disks increases， the heat transfer effect of upstream disk is enhanced， but the effect is barely observed for downstream disk.

Key words: Counter-rotating disk cavity；Heat transfer；Nusselt number；Numerical simulation；Turbulence model

权剑,罗翔,彭于博,胡彦文. 对转盘腔换热特性数值研究[J]. 推进技术, 2018, 39(12): 2813-2819.

QUAN Jian,LUO Xiang,PENG Yu-bo,HU Yan-wen. Numerical Study of Heat Transfer Characteristics Inside Counter-Rotating Disk Cavity[J]. Journal of Propulsion Technology, 2018, 39(12): 2813-2819.

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