论文标题
高压HE-H2-O2可燃混合物的未关注激光点火
Unfocused laser ignition of high-pressure He-H2-O2 combustible mixtures
论文作者
论文摘要
我们使用未关注的ND：YAG激光稀释的高压（P> 20-30 bar）氢氧混合物的一致点火。这对应于激光辐照到文献中报告的最小点火能的几个数量级。通过将镜子放入圆柱形容器中，并用H2-HE或O2-HE-HE-不耐燃料的混合物将其填充100 bar，我们获得了可燃He-H2-O2混合物的压力依赖性吸收性。我们发现，对于总体压力范围，没有可测量的激光信号吸收到实验设备灵敏度（约占激光辐照度的1％）。这使信誉得出了这样的理论，即点火源于自动焦化气体/杂质在气体中产生的种子电子。
We report consistent ignition of high-pressure (p > 20-30 bar) hydrogen-oxygen mixtures diluted with helium, using an unfocused Nd:YAG laser. This corresponds to laser irradiances several orders of magnitude below the minimum ignition energies reported in the literature. By placing a mirror inside a cylindrical vessel and filling it up to 100 bar with H2-He or O2-He non-combustible mixtures, we obtain the pressure-dependent absorptivity of the combustible He-H2-O2 mixture. We find no measurable absorption of the laser signal by the medium, for the overall pressure range, to the experimental apparatus sensitivity (about 1% of the laser irradiance). This leads credence to the theory that ignition stems from seed electrons created by autofocusing ionization of dust/impurities in the gas.
