A two-dimensional computer code to solve the Burnett equations has been developed. It extends the RPLUS2D code to implement high-order Burnett source terms and slip-wall conditions for velocity and temperature. The code employs finite volume, upwind lower-upper time marching techniques to solve the Burnett equations. Higher-order Burnett viscous stress and heat flux terms were discretized using central-differencing and treated as source terms. Slip-wall conditions for both velocity and temperature were treated implicitly. Rep-resentative results for low-density nozzle flows were obtained and compared with the Navier-Stokes solutions. With low chamber pressures, results from the Burnett solutions have clearly demonstrated the low-density nozzle flow characteristics and are found to be different from the Navier-Stokes solutions.
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