COMPUTATION OF VISCOUS HYPERSONIC NONEQUILIBRIUM BLUNT BODY FLOW

The paper deals with a numerical integration scheme for the time depen dent Navier-Stokes equations in two spatial dimensions. The algorithm was used to calculate the flow past a blunt body flying at an altitude of about 35 km with a velocity between 2000 and 3000 m/s. Appropriate to the high temperatures in the shock layer the air was assumed to be a mixture of calorical imperfect gases. Finite rate chemical reaction s were accounted for, whereas thermal equilibrium was assumed througho ut. The air model is based on the 5-component-model of Park [1]. A sho ck-capturing, explicit algorithm forms the basis of the code's method. Shock-capturing capability is achieved through a one-dimensional ENO- Scheme [2], extended to two dimensions by means of dimensional splitti ng [3]. Test calculations were carried out for the spherical nose of t he ELAC-1 configuration examined in the DFG-Sonderforschungsbereich 25 3. Grids were generated using a hyperbolic algorithm following Chausse e and Steeger [4]. For improved bow shock resolution an adaptive grid generator according to Brackbill and Saltzman [5] was implemented.