Abstract
In this article an algorithm is developed to solve the equations for one-dimensional unsteady flow of compressible fluids in the presence of area change, wall friction, heat transfer, and entropy gradients. The algorithm is based on a rectangular mesh solution of the cor responding characteristics equations in the space-time plane. It is arranged in a generalized form to permit convenient application to a variety of engineering systems. A model of the gas exchange process occurring in a two-stroke internal combustion engine with intake and exhaust ducts is used to demonstrate application of the algorithm and to observe the accuracy and stability of solutions with varying mesh-step size.
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