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Nonreacting flow characteristics are important for determining the performances of combustors. In the present work, the effects of mainstream swirling on the nonreacting flow characteristics of an outer-cavity trapped vortex combustor are investigated by introducing swirlers. The results are first validated by particle image velocimetry measurements by considering four swirl numbers (0, 0.4, 0.6, and 0.8) and three velocity sets. The results show that the addition of swirlers in the mainstreamdoi:10.47176/jafm.14.04.32262 fatcat:47pu4z2rxffk3emz4wxoixreti