Abstract
This paper presents a formal description of ‘GAS-DYN', a microcomputer-based, interactive, menu-driven, visual software package, developed to make investigations on steady and transient operations of isentropic and non-isentropic (shock) flow regimes in variable area ducts. Both the subroutines performing the computations and the interfaces for visual communication are constituted in Visual Basic. The aim of this study is to provide mechanical engineering students with all that is necessary to study variable area duct flow and to enable flexible operation opportunity within the courseware and its software environment. Using the program means that not only the property changes in the flow can be calculated and displayed in tabulated, graphical and documental form, but also by performing projects with different geometries, fluids and inlet and back conditions, design of experimental set-ups can be supported. Lastly, input and output menus, various run types and graphical representation capabilities of the package are demonstrated by two instructive example projects.