"A detailed experimental study of single front lean laminar hydrogen/methane/air stretched flames propagation and extinction is proposed to carry out. Flames gas-dynamic, thermal, and chemical structure will be characterized using Particle Image Velocimetry, thin filament pyrometry, and PLIFmethods. Flames propagating in vertical half opened channels of various diameters will be studied to establish the coupled effects of the flame stretch and radiation heat transfer, preferential diffusion and heat loss to wall on a single-front flame propagation and extinction. The proposed research will provide new fundamental knowledge concerning safety characteristics for delivery, handling and utilization of hydrogen/methane/air mixtures. Newly obtained results are expected to be valuable for the improvement of flamelet-based codes for modeling turbulent combustion in practical devices operating on these novel fuel blends. A group of researchers from the Host Organization leaded by the Incoming Researcher will participate in the proposed work. It is expected that Incoming Researcher will train researchers of the Host Organization in methodologies for performing in-plane laser based measurements in round channels, extracting various flame characteristics from Particle Image Velocimetry measurements, and application of different non-intrusive diagnostics for combustion studies. In turn, the Incoming Researcher will acquire such valuable for his future career skills as performing PLIF measurements, leading collective experiments, and writing research proposals. Mutual exchange visits of leading researchers of the Host Organization and of Odessa National University, Ukraine, are planned during the proposed project implementation. During these visits, researchers will share their knowledge, methodologies and new ideas, and will discuss and plan future collaboration in the form of exchange of PhD students and joint participation in international projects."