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论文:2019,Vol:37,Issue(3):565-571 |
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引用本文： |
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龚志斌, 李杰, 单继祥, 张恒. 动力喷流效应混合方法数值模拟研究[J]. 西北工业大学学报 |
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GONG Zhibin, LI Jie, SHAN Jixiang, ZHANG Heng. Numerical Investigation of Powered Jet Effects by RANS/LES Hybrid Methods[J]. Northwestern polytechnical university |
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| 动力喷流效应混合方法数值模拟研究 |
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| 龚志斌1, 李杰2, 单继祥1, 张恒2 |
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1. 中国工程物理研究院 总体工程研究所, 四川 绵阳 621900;
2. 西北工业大学 航空学院, 陕西 西安 710072 |
| 摘要: |
| 从动力喷流效应精细化模拟需求出发，在k-ω SST湍流模型基础上建立了IDDES混合方法，采用了有限体积五阶WENO格式提高空间离散格式精度，开展了动力喷流效应混合方法数值模拟分析及应用研究。基于自由发展喷管流动和ARN2喷管算例，开展了动力喷流效应混合方法数值模拟验证分析，结果表明增加网格密度和提高空间离散格式可有效改善喷流速度分布预测结果，缩短喷管出口下游非物理流动稳定状态，瞬态流场结构更加清晰合理，湍流强度预测更加准确。在此基础上，针对较为实际的涡扇发动机模型，完成了动力喷流效应混合方法数值模拟分析，得到了内、外涵喷流和外界气流的相互干扰及掺混特征，得到了三维湍流结构特征。 |
| 关键词:
动力喷流效应
IDDES混合方法
空间离散格式精度
网格密度
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| Numerical Investigation of Powered Jet Effects by RANS/LES Hybrid Methods |
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| GONG Zhibin1, LI Jie2, SHAN Jixiang1, ZHANG Heng2 |
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1. Institute of Engineering System of CAEP, Mianyang 621900, China;
2. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| For the high-precision simulation of engine jet effects, an improved delayed detached eddy simulation (IDDES) method based on the two-equation shear stress transport (SST) model is developed, and the fifth-order finite-volume weighted essentially non-oscillatory (WENO) scheme is employed to enhance accuracy of spatial discretization, and then numerical investigation of powered jet effects by RANS/LES hybrid methods is carried out. The effects of the grid distributions and the accuracy of the spatial schemes are discussed during the RANS/LES validation analysis on the fully expanded jet flow and Acoustic Reference Nozzle (ARN) jet flow. The results show that, by enlarging the grid density and improving the accuracy of the spatial schemes, the velocity distributions in the jet flow can be better predicted, the non-physical steady flow after the jet nozzle can be shortened, the instantaneous flow structures are clearer and the turbulent intensities are more accurate. Then IDDES simulation of turbofan engine jet flow is carried out. The mixing characteristics of the external fan jet flow and internal core jet flow as well as the ambient flow are obtained, and the three-dimensional turbulent structures are also given. |
| Key words:
engine jet effects
IDDES hybrid method
accuracy of spatial discretization
grid density
turbulent structure
velocity distribution
nozzle
numerical simulation
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| 收稿日期: 2018-05-16
修回日期:
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| DOI: 10.1051/jnwpu/20193730565 |
| 基金项目: 国家自然科学基金（11172240）资助 |
| 通讯作者:
Email： |
| 作者简介: 龚志斌(1986-),中国工程物理研究院工程师、博士,主要从事飞行器总体设计、理论与计算流体力学研究。
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| 作者相关文章 |
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| 龚志斌 在本刊中的所有文章 |
| 李杰 在本刊中的所有文章 |
| 单继祥 在本刊中的所有文章 |
| 张恒 在本刊中的所有文章 |
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