Non-premixed axisymmetric flames driven by ion currents

摘要: Abstract Non-premixed flames under the influence of external electric fields can become complicated as ion winds change transport/mixing dynamics flame environment. Burke and Schumman type are well studied non-premixed provide a well-suited combustion environment for studying in longitudinal fields. This work studies field effects on coflow burner stabilized flame. The flame’s spatial features CH* chemiluminescence light emission various positive strengths. base modification was dependent geometry burner. Despite this geometric dependence, chemi-ion production rates also increased that did not show to height indicating enhanced current is due partial premixing previously suggested. Roper’s model axially symmetric conical expanded upon predict what forcing needed create observed changes geometries, e.g. width. core assumptions made from classical were all retained while introducing an wind acceleration term gas velocity. Ion measurements long wire electrical probe positioned just below downstream mesh electrode deconvoluted reveal density distribution, body force derived. calculated (200–400 N/m2) agreed with theoretical model. revealed peak develops 2.5 mm center axis. result shows plane-to-plane configuration produces distinctly different distribution point-to-plane whose remains at centerline.