Aero-heating modelling on the ablative noses during flight trajectory

Abstract

Purpose

The purpose of this paper is to present the more accurate estimation of aero-heating for the ablative 3-D noses by using the viscous shock layers and similarity of viscous boundary layer methods.

Design/methodology/approach

The combination of viscous shock layer, similarity of viscous boundary layer (SVBL) methods, Park ablation and Baldwin–Lomax turbulent models is presented in this paper. The proposed method reduces computational memory and run time as compared to the time marching algorithms during flight trajectory. Therefore, the space marching algorithm and finite difference method is used, and the governing equations are transferred into curvature coordinate by using the mapping terms.

Findings

The solving for an ogive nose during flight trajectory shows that the convergence of this technique is fast as compared to the user defined function based on the fluent solvers, program to axisymmetric regular geometry code and other research. The results of this research are validated by the mentioned research studies. The relative error for the aero-heating, species concentration of the shock layer gas mixture because of dissociation/ionization of air and surface ablation results is less than 6, 5 and 11 per cent, respectively.

Research limitations/implications

The required time for an aerodynamic design of hypersonic noses reduces as the induced aero-heating is one of the principal design parameters in standpoint aerodynamic, structural and other terms. The magnitude of this parameter, surface temperature and surface recess because of ablation should be corrected during flight trajectory.

Social implications

The results of this research are applicable for aerospace industries.

Originality/value

The originality of this paper is 90 per cent.

Citation

Doustdar, M.M., Mardani, M. and Ghadak, F. (2018), "Aero-heating modelling on the ablative noses during flight trajectory", Aircraft Engineering and Aerospace Technology, Vol. 90 No. 8, pp. 1145-1155. https://doi.org/10.1108/AEAT-07-2016-0108