为了揭示稀疏波对甲烷空气预混气中层流传播火焰结构及压力特性等的影响规律,利用高速纹影摄像、压力测试等实验手段对小型密闭燃烧容器内甲烷-空气预混气中传播的层流火焰与稀疏波的相互作用规律进行了实验研究.研究结果表明,当稀疏波作用于层流传播火焰后,在数毫秒内火焰就由层流燃烧充分发展成湍流燃烧,其结果使得燃烧面积迅速增大,压力上升速度加快. In order to reveal the influence of the sparse wave on the flame propagation and pressure characteristics in laminar air pre-mixed gas, the velocity distribution of the methane-air pre-mixed gas in the small-scale airtight combustion vessel was experimentally studied by means of high speed profiling camera and pressure test. The experimental results show that when a sparse wave is applied to the laminarly propagating flame, the flame fully develops from laminar to turbulent combustion within a few milliseconds. As a result, the combustion area Rapid increase, the pressure rise faster.