City Research Online

Abstract

Cavitation and cavitation-induced erosion depend on fuel properties and working conditions. The majority of studies on cavitation consider simple thermodynamic Equations of State (EoS), which limit the analysis of thermal effects associated with the high pressure and temperatures occurring during bubble collapses. This can affect simulation fidelity, particularly when comparing fuels with different thermodynamic properties. The goal of this work is to examine, with the use of a real-fluid thermodynamic model, both pressure peaks and thermal effects owing to cavitation collapse of a cluster of vapour bubble at conditions prevailing in the fuel flow path inside modern fuel injectors; the selected conditions correspond to injectors utilised with Dual Fuel Internal Combustion Engines (DFICEs), using the properties of three different fuels for obtaining insights on how the cavitation cloud is developing during its collapse. The fuel’s properties are exported on a structured table, which has been derived from the Helmholtz Energy EoS. This table is incorporated into an explicit density-based solver, using a Mach-consistent numerical flux for subsonic up to supersonic flow conditions. Evaluation of the developed solver is performed initially against benchmark cases reported in the open literature. Following the results from the selected fuels are compared and most evident differences are discussed.

Publication Type:	Conference or Workshop Item (Paper)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery T Technology > TL Motor vehicles. Aeronautics. Astronautics
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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