Possibility of determining the velocities of turbulent and laminar flames at high initial temperatures

A low-velocity detonation regime without self-ignition is discovered in which turbulent flame is held at a distance of several channel diameters behind the leading-shock wave due to gas “suction” to the turbulent boundary layer at the tube wall. The structure of such a detonation agrees principally with the structure of low-velocity detonation in a capillary with a laminar boundary layer. Calculation results for the distance from the shock wave to the flame agree with the experimental data. It is proposed to use the experimental value of the distance to determine flame velocities in a nonturbulent shock-heated gas under conditions of extremely short ignition delays. The domains of existence of the initial pressures of multiheaded and low-velocity detonations partially overlap.