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Dynamic Drag Reduction Effects of Aerospikes and Aerodisks
International Journal of Aerospace Engineering ( IF 1.4 ) Pub Date : 2021-08-31 , DOI: 10.1155/2021/9370331
Rong Han 1 , Wei Liu 1 , Xiaoliang Yang 1 , Xinghua Chang 2
Affiliation  

In order to investigate the dynamic characteristics of blunt aircraft mounted with aerospikes and aerodisks in large-amplitude force-pitching, the Roe spatial scheme and the lower-upper symmetric Gauss-Seidel (LU-SGS) method with dual time step are employed for discretization of unsteady Navier-Stokes (N-S) equations. A parametric investigation on the flow fields is conducted by altering the pitching period, aerospike length, and aerodisk diameter consequently via a variable-controlling procedure. Dynamic characteristics of aerodynamic drag as well as the visualization of unsteady flow fields are achieved, and the results show that the aerodynamics of hypersonic aircraft under the condition of large-amplitude force-pitching vibration have hysteresis characteristics affected by periods of force-pitching vibration. In addition, when changing aerospike length and aerodisk diameter, the variation tendency of drag reduction efficiency is determined by the pitching angle of the oscillation process.

中文翻译:

Aerospikes 和 Aerodisks 的动态减阻效果

为研究大振幅力俯仰飞行器安装有气钉和气盘的钝器的动力学特性,采用 Roe 空间方案和双时间步长的下上对称 Gauss-Seidel (LU-SGS) 方法进行离散化非定常 Navier-Stokes (NS) 方程。通过可变控制程序改变俯仰周期、气钉长度和气盘直径,对流场进行参数研究。实现了气动阻力的动力学特性以及非定常流场的可视化,结果表明高超声速飞机在大振幅力俯仰振动条件下的气动特性具有受力俯仰振动周期影响的滞后特性。此外,
更新日期:2021-08-31
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