SIERRA/premo - A new general purpose compressible flow simulation code. This paper reports on the progress of a new compressible flow simulation code being developed at Sandia National Laboratories. The code called Premo is a CFD module that is part of a much larger multimechanics code framework called SIERRA. The goal of the Premo project is to deliver a general purpose CFD capability for designers and analysts of aerodynamics of flight vehicles. SIERRA provides unstructured mesh data services common to many computational mechanics codes. Utilizing the framework allows for rapid development of physics modules. In addition, the SIERRA framework provides an interface that will make it possible to conduct multiphysics simulations between physics modules to solve such problems as aero-thermal vehicle heating and aeroelasticity in the future. Current code capabilities are demonstrated by solving one-, two- and three-dimensional flow problemss.