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ISSN 在线: 2688-7231

ISBN 在线: 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

On Drag and Heat flux by Integration of Cavity and Counter-jet in Reacting Non-equilibrium Flows

Get access DOI: 10.1615/IHMTC-2021.280
pages 187-193

摘要

The reduction of drag and heating load on high-speed vehicles always remains a challenging task among researchers. Because of this, various structured and unstructured drag and heat flux reduction techniques are devised to lower these problems. A non-equilibrium type chemical flow solver is used to evaluate drag in high enthalpy laminar flows. The flow solver was validated before drag evaluation. Present studies are carried out for heat reduction and corresponding drag reduction by using combined methods, such as stagnation cavity and counter-jet techniques. A lot of computational works have been performed using these two methods with assuming air as a calorically perfect gas and hence this paper focuses on the real gas model. Results obtained from the in-house solver proved that this combined technique is more effective than only cavity-based or only jet-based techniques. 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 near the main body. Various freestream stagnation enthalpy, as well as the jet pressure, are used to investigate the performance alteration proposed by this combined technique. The drag and heat load reduction efficiency of the combined configuration increases with increasing the counterflowing jet pressure.
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