Affiliation of Author(s):能源与动力学院
Journal:ACTA ASTRONAUTICA
Key Words:Spiked blunt body Aerodynamic heating Fluid-thermal analysis MpCCI
Abstract:When flying at hypersonic speeds, the spiked blunt body is constantly subjected to severe aerodynamic heating. To illustrate the thermal response of different configurations and the relevant flow field variation, a loosely coupled fluid-thermal analysis is performed in this paper. The Mesh-based parallel Code Coupling Interface (MpCCI) is adopted to implement the data exchange between the fluid solver and the thermal solver. The results indicate that increases in spike diameter and length will result in a sharp decline of the wall temperature along the spike, and the overall heat flux is remarkably reduced to less than 300 W/cm(2) with the aerodome mounted at the spike tip. Moreover, the presence and evolution of small vortices within the recirculation zone are observed and proved to be induced by the stagnation effect of reattachment points on the spike. In addition, the drag coefficient of the configuration with a doubled spike length presents a maximum drop of 4.59% due to the elevated wall temperature. And the growing difference of the drag coefficient is further increased during the accelerating process.
ISSN No.:0094-5765
Translation or Not:no
Date of Publication:2017-03-01
Co-author:秦启豪,郭帅
Correspondence Author:Xu Jinglei