Analysis and design optimization of blunt bodies in hypersonic flow


Piskin T., EYİ S. , Yumusak M.

32nd AIAA Applied Aerodynamics Conference 2014, Atlanta, GA, United States Of America, 16 - 20 June 2014 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.2514/6.2014-3255
  • City: Atlanta, GA
  • Country: United States Of America

Abstract

The purpose of this study is to model hypersonic flow around blunt body especially in atmospheric reentry of Earth. The more detailed model contains each energy transformation between each energy modes and all reactions. To simulate flow field region, thermal and chemical nonequilibrium must be considered all together. For the chemical nonequilibrium, species masses production of reactions must be characterized with suitable model. In this study, flow analysis based on the finite rate chemical reaction equations. Flow field region is assumed as continuum. Also flow is considered as inviscid and there is no diffusion. Computation of flow field is based on the axisymmetric Euler code. Coupled equations, chemical and thermal nonequilibrium equations are solved by using Newton's method. Jacobian matrices are calculated analytically. In the design part, aim is to obtain reduced pressure drag while keeping the body as blunt. Optimization results for various situations are represented.