Hydrogen is an ideal alternative fuel due to its carbon-free content, wide flammability limit,
high specific energy, and unique physical and thermo-chemical behavior. Hydrogen …

An experimental study on the auto-initiation process of rotating detonation waves (RDWs)
was conducted with high-temperature hydrogen-rich gas as the fuel and air as the oxidant …

Engine knock has long been one of the major obstacles for improving thermal efficiency of
spark-ignition (SI) engines. An in-depth understanding of the engine knock mechanism and …

Detonation development from a hot spot has been extensively studied, where ignition occurs
earlier than that in the surrounding mixtures. It has also been reported that a cool spot can …

This study investigates the impact of the near-wall temperature gradient on hydrogen auto-
ignition characteristics using one-dimensional (1D) fully resolved simulations. Ten cases are …

Numerical simulations are performed to study the mechanism of deflagration to detonation
transition (DDT) in a pre-/main-chamber combustion system with a stoichiometric ethylene …

Hydrogen engines with zero-carbon emissions have recently drawn attention while they
often suffer from pre-ignition and knocking issues. It is generally understood that knocking …

Gaseous detonation waves in a uniform mixture have been studied widely, but uniformity is
seldom realized in practical applications such as detonation-based engines. Nonideal …

Previous work shows that auto-ignition propagation modes for strong knocking in engines
are dominated by both chemical reactivity and energy density. To clarify the unique role of …

End-gas auto-ignition leading to knocking combustion is one of the major barriers to
achieving higher thermal efficiencies in downsized boosted spark-ignition engines. Despite …