Effects of asynchronous ignition phase on knock combustion of two-stroke engine

In order to understand the impact of asynchronous ignition phase on the knock of two-stroke kerosene aero-piston engine, a calculation model of the combustion chamber was established by using fire software. And the validity of the model was verified by the test data. The simulation and test results show that: at 5000r/min, full load and equivalence ratio of the mixture under 1.1 conditions, ignition energy at 35.64mJ conditions, when one of the spark plugs ignition time is fixed at before top dead center crank angle is 29°, another ignition time is set ahead of crank angle is 1°, 3° and 5° relatively; with the increase of the phase difference of the double spark ignition, the average pressure, heat release rate and the accumulated heat release rate have decreased. The turbulent kinetic energy of the two spark plugs increases, the flame propagation velocity rises, the flame development period is shortened, and the concentration of the knock intensity is reduced gradually.