caa a22 4500 606197044 CHVBK 20210128100927.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1885-3 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1885-3 Structure and dynamics of the wake of a reacting jet injected into a swirling, vitiated crossflow in a staged combustion system [Elektronische Daten] [Pratikash Panda, Mario Roa, Peter Szedlacsek, Walter Laster, Robert Lucht] Secondary injection of the fuel, also referred to as staged combustion, is being studied by gas turbine manufacturers as a means of increasing the power output of the gas turbine systems with minimal contribution to NO x emission. A reacting jet issuing into a swirling, vitiated crossflow operating at gas turbine relevant conditions was investigated as a means of secondary injection. In this study, the flow field of the reacting jet was investigated using high repetition rate (HRR) (5kHz), two-component particle imaging velocimetry and OH-PLIF. In applications similar to the one currently studied in this work, viz. secondary injection of fuel in a gas turbine combustor, rapid mixing and chemical reaction in the near field of jet injection are desirable. Based on our analysis, it is hypothesized that the shear layer and wake field vortices play a significant role in stabilizing a steady reaction front within the near wake region of the jet. Premixed jets composed of natural gas and air were injected through an extended nozzle into the vitiated flow downstream of a low-swirl burner that produced the vitiated, swirled flow. The jet-to-crossflow momentum flux ratio was varied to study the corresponding effect on the flow field. The time-averaged flow field shows a steady wake vortex very similar to that seen in the wake of a cylindrical bluff body which helps to stabilize the reaction zone within the wake of the jet. The HRR data acquisition also provided temporally resolved information on the transient structure of the wake flow associated with the reacting jet in crossflow. Springer-Verlag Berlin Heidelberg, 2015 Panda Pratikash School of Mechanical Engineering, Purdue University, 585 Purdue Mall, 47907-2088, West Lafayette, IN, USA aut Roa Mario School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN, USA aut Szedlacsek Peter Siemens Energy, Orlando, FL, USA aut Laster Walter Siemens Energy, Orlando, FL, USA aut Lucht Robert School of Mechanical Engineering, Purdue University, 585 Purdue Mall, 47907-2088, West Lafayette, IN, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-20 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1885-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-014-1885-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Panda Pratikash School of Mechanical Engineering, Purdue University, 585 Purdue Mall, 47907-2088, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Roa Mario School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Szedlacsek Peter Siemens Energy, Orlando, FL, USA aut NATIONALLICENCE 700 1- Laster Walter Siemens Energy, Orlando, FL, USA aut NATIONALLICENCE 700 1- Lucht Robert School of Mechanical Engineering, Purdue University, 585 Purdue Mall, 47907-2088, West Lafayette, IN, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-20 0723-4864 56:1<1 2015 56 348