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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Aerothermodynamic of Drag by Using Spike and Counter-flow Jet Techniques in Reacting Hypersonic Flows

Get access (open in a dialog) DOI: 10.1615/IHMTC-2021.190
pages 125-131

Abstract

Aerothermodynamic analysis was performed for blunt-body configurations with a circular tip spike mounted to determine drag and heat reduction effectiveness. In-house perfect gas and viscous non-equilibrium finite volume based reacting solvers were utilized. Obtained results from the calorically perfect model compared with the real gas model and results show that a 5% difference in the total drag and 57.21 KW/m2 the difference in peak heat flux is observed for 2 MJ/kg case. Further, investigations are carried forward with a counterflowing jet installed at the root of the spike. This technique proved to be more effective than only the spike-based technique. Here, the possibility of drag and surface heat flux reduction is very much evident due to the formation of a large low-pressure re-circulation region and low-temperature jet gas present in the vicinity of the object. Various freestream stagnation enthalpy, as well as the jet pressure, are also used to investigate the performance alterations proposed by this combined technique. The drag and heat load reduction efficiency of the combined configuration decreases with increasing the freestream stagnation enthalpy, for constant jet pressure and with increasing the jet pressure further drag reduction and heat load reduction is possible.