This article presents an analytical model to describe plasma discharges effects on gas temperature and species dissociation that control autoignition in reactive systems. The model is constructed based on experimental and numerical results of Nanosecond Repetitively Pulsed (NRP) discharges in air and evaluated against the existing experimental data. The model is fully coupled with multi-dimensional flow balance equations where detailed transport coefficients and chemical kinetic mechanism are considered. Sequence of discharge pulses in air and methane-air mixture are computed by means of Direct Numerical Simulations in quiescent and turbulent flow configurations. Gas temperature, pressure and O atoms evolution during NRP discharges in air are in good agreement with experimental results. Ignition phenomenon through NRP discharges of a methane-air mixture is analyzed. The results show an accumulation of vibrational energy in the vicinity of the discharge zone due to the former discharges prior to mixture ignition. This discharge energy stored as gas vibrational energy seems to play a minor role on the ignition process initiation. The early production of O atoms during the discharge favors the initial chain branching reactions, increasing the concentration of radicals in the vicinity of the discharge zone. The initial conditions of turbulence, such as Reynolds number, inside the discharge zone impacts on the number of pulses needed to ignite the mixture.