Title: Numerical methods to prevent pressure oscillations in transcritical flows,
Abstract: The accurate and robust simulation of transcritical real-fluid effects is
crucial for many engineering applications, such as fuel injection in internal
combustion engines, rocket engines and gas turbines. For example, in diesel
engines, the liquid fuel is injected into the ambient gas at a pressure that
exceeds its critical value, and the fuel jet will be heated to a supercritical
temperature before combustion takes place. This process is often referred to as
transcritical injection. The largest thermodynamic gradient in the
transcritical regime occurs as the fluid undergoes a liquid-like to a gas-like
transition when crossing the pseudo-boiling line (Yang 2000, Oschwald et al.
2006, Banuti 2015). The complex processes during transcritical injection are
still not well understood. Therefore, to provide insights into high-pressure
combustion systems, accurate and robust numerical simulation tools are required
for the characterization of supercritical and transcritical flows.