Steady C2H4/air flame: 4.14 cm/s (4.00 cc/s) C2H4; 8.66 cm/s (694 cc/s) air Laser-induced incandescence measurements of soot volume fraction Radius H = 10 mm H = 15 mm H = 20 mm H = 25 mm H = 30 mm H = 35 mm H = 40 mm H = 45 mm H = 50 mm H = 55 mm H = 60 mm H = 65 mm H = 70 mm H = 75 mm H = 80 mm H = 85 mm -7.00 4.727E-0010 7.057E-0010 1.038E-0009 3.875E-0010 -3.434E-0009 1.491E-0009 -7.922E-0010 -1.589E-0009 -1.186E-0009 -8.710E-0010 2.201E-0009 1.357E-0009 -5.440E-0010 -1.437E-0010 1.712E-0009 6.531E-0010 -6.75 2.982E-0010 2.975E-0009 -9.297E-0010 3.083E-0010 -1.499E-0009 9.010E-0010 -1.036E-0009 3.882E-0009 5.084E-0010 1.938E-0009 -9.239E-0011 2.909E-0010 6.757E-0010 -4.212E-0010 -3.054E-0009 -1.251E-0009 -6.50 1.462E-0009 1.137E-0009 1.888E-0009 -2.312E-0009 6.545E-0010 3.170E-0009 1.349E-0009 1.847E-0009 1.110E-0009 4.359E-0010 -1.354E-0009 -7.158E-0010 -9.383E-0010 -5.277E-0010 1.730E-0009 2.093E-0010 -6.25 1.508E-0009 -2.498E-0009 1.571E-0009 -1.417E-0009 1.239E-0009 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3.074E-0007 1.272E-0006 4.666E-0006 9.628E-0006 1.268E-0005 1.218E-0005 5.044E-0006 8.962E-0007 6.246E-0007 9.517E-0008 4.072E-0008 2.547E-0009 2.824E-0009 -1.985E-0009 -2.25 7.822E-0009 5.745E-0008 1.549E-0007 4.467E-0007 1.883E-0006 4.802E-0006 8.278E-0006 1.218E-0005 1.208E-0005 6.144E-0006 4.633E-0006 1.368E-0006 3.121E-0007 9.331E-0009 1.161E-0008 -2.926E-0009 -2.00 2.970E-0009 3.132E-0008 1.011E-0007 2.515E-0007 9.249E-0007 2.767E-0006 4.946E-0006 7.046E-0006 9.843E-0006 1.078E-0005 7.874E-0006 5.502E-0006 2.212E-0006 2.964E-0008 1.946E-0007 5.646E-0009 -1.75 3.654E-0009 3.210E-0008 8.948E-0008 2.002E-0007 5.725E-0007 2.011E-0006 3.766E-0006 4.866E-0006 5.671E-0006 7.239E-0006 5.487E-0006 5.581E-0006 3.393E-0006 1.967E-0007 3.872E-0007 6.149E-0009 -1.50 3.518E-0009 1.572E-0008 6.572E-0008 1.400E-0007 4.098E-0007 1.644E-0006 3.238E-0006 4.258E-0006 4.685E-0006 5.068E-0006 4.274E-0006 3.742E-0006 2.310E-0006 7.267E-0007 2.661E-0007 3.865E-0009 -1.25 4.171E-0009 1.507E-0008 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