Uncontrolled atmospheric entry of meteors, satellites, and spacecraft components often leads to their partial or complete demise. In this destructive process, driven by hypersonic ablation, reentry objects fragment, interact, alter each other's aerothermal environment. The effect these interactions on the heat transfer fragments has not been investigated, despite transfer's importance in ablati...

Effect of altitude is discussed in the unsteady separation of multi stage rockets. Axisymmetric, unsteady and turbulent Navier stokes equations are solved numerically. The governing equations are split into a hyperbolic inviscid part and a parabolic diffusion part. The hyperbolic part is solved by an explicit second-order time and space of Godunov-type scheme. Moving mesh and moving boundary al...

We proposed rigorous definitions of Radon measure solutions for boundary value problems steady compressible Euler equations which modeling hypersonic-limit inviscid flows passing two-dimensional ramps, and their interactions with still gas pressureless jets. proved the Newton-Busemann pressure law drags body in hypersonic flow, constructed various physically interesting density containing Dirac...

The operability limits of a supersonic combustion engine for an air-breathing hypersonic vehicle are characterized using numerical simulations and an uncertainty quantification methodology. The time-dependent compressible flow equations with heat release are solved in a simplified configuration. Verification, calibration and validation are carried out to assess the ability of the model to repro...

In this part of the investigation, flow-field properties of hydrogen jets injected into a hypersonic flow are reported. The combustor has a single fuel injection parallel to the main flow from the base. The numerical simulation has been done with finite rate chemistry model using K-ε turbulence model. The results obtained through the numerical simulation of the cavity based fuel injectors are p...

Depending on the case study examined, different PSPs may be used, each applied using a different method onto the model. For polymer PSP the paint is sprayed on. In contrast, the model may first be anodized or covered with a thin-layer chromatography plate and then dipped in PSP. The objective of the present study is to analyse the characteristics of different PSP substrates at high Mach numbers...