The present work is devoted to the experimental study of the spatial structure of the premixed propane-air and methane-air flames. Non-swirling and swirling regimes of the open and confined flames were investigated. Measurements were performed by using modern optical methods. Stereo PIV was applied to measure the instantaneous velocity fields. Besides, a highrepetition PIV system was utilized to achieve a high temporal resolution. For analysis of turbulent combustion intensity, CH* chemiluminescence signal of the flames was captured by an UV sensitive ICCD camera. The present study was focused on the efficiency of passive and active control to increase combustion in turbulent jet flames.