Recent discoveries and developments on the dynamic process of premixed turbulent spark ignition are reviewed. The focus here is on the variation of turbulent minimum ignition energies (MIE_T) against laminar MIE (MIE_L) over a wide range of r.m.s. turbulence fluctuation velocity (uʹ) alongside effects of the spark gap between electrodes, Lewis number, and some other parameters on MIE. Two distinguishable spark ignition transitions are discussed. (1) A monotonic MIE transition, where MIE_L sets the lower bound, marks a critical uʹ_c between linear and exponential increase in MIE_T with uʹ increased. (2) A non-monotonic MIE transition, where the lower bound is to be set by a MIE_T at some uʹ_c, stems from a great influence of Lewis number and spark gap despite turbulence. At sufficiently large Lewis number >> 1 and small spark gap (typically less than 1 mm), turbulence facilitated ignition (TFI), where MIE_T < MIE_L, occurs; then MIE_T increases rapidly at larger uʹ > uʹ_c because turbulence re-asserts its dominating role. Both phenomena are explained by the coupling effects of differential diffusion, heat losses to electrodes, and turbulence on the spark kernel. In particular, the ratio of small-scale turbulence diffusivity to reaction zone thermal diffusivity, a reaction zone Péclet number, captures the similarity of monotonic MIE transition, regardless of different ignition sources (conventional electrodes versus laser), turbulent flows, pressure, and fuel types. Furthermore, TFI does and/or does not occur when conventional spark is replaced by nanosecond-repetitively-pulsed-discharge and/or laser spark. The latter is attributed to the third lobe formation of laser kernel with some negative curvature segments that enhance reaction rate through differential diffusion, where MIE_L < MIE_T (no TFI). Finally, the implications of MIE transitions relevant to lean-burn spark ignition engines are briefly mentioned, and future studies are suggested.

综述了预混湍流火花点火动力学过程的最新发现和进展。这里的重点是湍流最小点火能量 (MIE _T ) 与层流 MIE (MIE _{L ) 在均方根湍流波动速度 (} u ʹ)的广泛范围内的变化，以及电极之间的火花间隙、路易斯数和一些MIE 上的其他参数。讨论了两个可区分的火花点火过渡。(1) 单调MIE 转换，其中 MIE _L设置下限，标记MIE _T中线性和指数增长之间的临界u ʹ _c与u增加。(2) 非单调MIE 过渡，其中下界由 MIE _T设置在某个u ʹ _c处，尽管存在湍流，但仍受 Lewis 数和火花间隙的巨大影响。在足够大的路易斯数 >> 1 和小火花间隙（通常小于 1 毫米）时，会发生湍流促进点火 ( TFI )，其中 MIE _T  < MIE _L；然后 MIE _{T在较大的}u ʹ >  u ʹ _c处迅速增加因为湍流重新发挥了它的主导作用。这两种现象都可以通过微分扩散、电极的热损失和火花核上的湍流的耦合效应来解释。特别是，小规模湍流扩散率与反应区热扩散率（反应区Péclet 数）的比率捕捉了单调MIE 转变的相似性，无论点火源（传统电极与激光）、湍流、压力和燃料如何类型。此外，TFI当传统火花被纳秒重复脉冲放电和/或激光火花取代时，会发生和/或不会发生。后者归因于激光内核的第三瓣形成，具有一些负曲率段，通过微分扩散提高反应速率，其中 MIE _L  < MIE _T（无TFI）。最后，简要提到了与稀燃火花点火发动机相关的MIE 过渡的影响，并建议了未来的研究。