F. Hempert,
S. Boblest,
M. Hoffmann,
P. Offenhäuser,
F. Sadlo,
C. W. Glass,
C.-D. Munz,
T. Ertl,
U. Iben:
In Proceedings of High Performance Computing in Science and Engineering 2016, Springer International Publishing,
pp. 289–300,
2016.
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Abstract
Industrial devices such as gas injectors for automotive combustion engines operate at ever-increasing pressures and already today reach regimes beyond the ideal-gas approximation. Numerical simulations are an important part of the design process for such components. In this paper, we present a case study with a computational fluid dynamics code based on the discontinuous Galerkin spectral element method with a real-gas equation of state. We assess a high-pressure throttle and jet flow as a basic model of a gas injector. We apply a shock-capturing method to achieve a robust simulation, and a newly developed method to maintain high efficiency despite load imbalances introduced by the shock capturing. The results indicate a dynamic mass flow rate at different pressure ratios between the inlet and outlet.
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