POSSIBILITY OF DETERMINING THE VELOCITIES OF TURBULENT AND LAMINAR FLAMES AT HIGH INITIAL TEMPERATURES

A low-velocity detonation regime without self-ignition is discovered i n which turbulent flame is held at a distance of several channel diame ters behind the leading-shock wave due to gas ''suction'' to the turbu lent boundary layer at the tube wall. The structure of such a detonati on agrees principally with the structure of low-velocity detonation in a capillary with a laminar boundary layer. Calculation results for th e distance from the shock wave to the flame agree with the experimenta l data. It is proposed to use the experimental valve of the distance t o determine flame velocities in a nonturbulent shock-heated gas under conditions of extremely short ignition delays. The domains of existenc e of the initial pressures of multiheaded and low-velocity detonations partially overlap.