Author(s)

F. Seller, K. Zimmermann & A. Pfettscher

Abstract

The paper describes the modeling of a compressible and turbulent gap flow at high gas pressures and high gas temperatures. A description of the measuring technique applied and a detailed explanation of the numerical procedure is given. The comparison of theory and experiment validates the gap flow model used for predicting gas leakage effects in high pressure piston devices. 1 Introduction 1.1 Gas Leakage In many industrial and scientific applications flows through gaps play an important role, especially when sealing problems are present followed by gas leakage. Gas leakage, e. g., may occur in labyrinth seals in jet engines as well as along a piston moving, e.g.

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