Effect of microjet on heat and drag in hypersonic flows

Abstract

Aerodynamic drag and heat are some of the most promising design constraints which play a vital role in aircrafts that travel with Mach number greater than 5. Higher aerodynamic heat is caused by sharp edged bodies. Therefore, blunt shape nose is preferred if the nose material puts an upper limit on aerodynamic heating. Larger nose radius allows the heat to spread over a large area and produce lower peak loads. The current work focuses on addition of high-speed fluid which is generally called as jet on a blunt body by varying the angle of attacks of both the jet and the body using Ansys Fluent software. Aerodynamic heating causes damage to the nose of hypersonic aircrafts. High bluntness leads to drag production at hypersonic speeds. The body is kept at different angle of attacks with jet and without jet and wall heat transfer is observed at the stasis point. The commencement of jet for 0° also deflates greatest heat transfer value at the stasis point by 17% although correlated along with body at 0° in the absence of jet. Coefficient of drag values i.e. Cd values doesn’t change much and these values flutter among 0.0043 and 0.00438 for a fixed ratio of pressures. From this work it can be concluded that initiation of micro jet is the prime approach to avert vast heat.Aerodynamic drag and heat are some of the most promising design constraints which play a vital role in aircrafts that travel with Mach number greater than 5. Higher aerodynamic heat is caused by sharp edged bodies. Therefore, blunt shape nose is preferred if the nose material puts an upper limit on aerodynamic heating. Larger nose radius allows the heat to spread over a large area and produce lower peak loads. The current work focuses on addition of high-speed fluid which is generally called as jet on a blunt body by varying the angle of attacks of both the jet and the body using Ansys Fluent software. Aerodynamic heating causes damage to the nose of hypersonic aircrafts. High bluntness leads to drag production at hypersonic speeds. The body is kept at different angle of attacks with jet and without jet and wall heat transfer is observed at the stasis point. The commencement of jet for 0° also deflates greatest heat transfer value at the stasis point by 17% although correlated along with body at 0° in the...