Publications

Combustion Instability

Doleiden, D., Culler, W., Tyagi, A., Peluso, S., O’Connor, J., (2019) “Flame edge dynamics and interaction in a multi-nozzle can combustor with fuel staging,” Journal of Engineering for Gas Turbines and Power, 141(10), p. 101009. Author accepted pre-print available here.

Karmarkar, A., Frederick, M. Clees, S., Mason, D., O’Connor, J., (2019) “Role of turbulence in precessing vortex core dynamics,” ASME Turbo Expo, Phoenix, AZ. Accepted author pre-print available here.

Doleiden, D., Culler, W., Tyagi, A., Peluso, S., O’Connor, J., (2019) “Flame edge dynamics and interaction in a multi-nozzle can combustor with fuel staging,” ASME Turbo Expo, Phoenix, AZ. Accepted author pre-print available here.

Chen, X., Dillen, E., Fathy, H., O’Connor, J., (2019) “Optimizing the design of a Rijke tube experiment for combustion stability model identifiability,” American Control Conference, Philadelphia, PA. Accepted author pre-print available here.

Culler, W., Chen, X., Samarasinghe, J., Peluso, S., Santavicca, D., O’Connor, J., (2018) “The effect of variable fuel staging transients on self-excited instabilities in a multiple-nozzle combustor,” Combustion and Flame194, p. 472-484.  Accepted author pre-print available here.

Culler, W., Chen, X., Peluso, S., Santavicca, D., O’Connor, J., Noble, D., (2018) “Comparison of center nozzle staging to outer nozzle staging in a multi-flame combustor,” ASME Turbo Expo, Oslo, Norway. Accepted author pre-print available here.

Chen, X., Culler, W., Peluso, S., Santavicca, D., O’Connor, J., (2018) “Comparison of equivalence ratio transients on combustion instability in single-nozzle and multi-nozzle combustors,” ASME Turbo Expo, Oslo, Norway. Accepted author pre-print available here.

Chen, X., Culler, W., Peluso, S., Santavicca, D., O’Connor, J., (2018) “Effects of equivalence ratio transient duration on self-excited combustion instability time scales in a single-nozzle combustor,” Spring Technical Meeting of the Eastern States Section of the Combustion Institute, State College, PA. Author copy here.

Sekulich, O., Culler, W., O’Connor, J., (2018) “The effect of non-axisymmetric fuel staging on flame structure in a multiple-nozzle model gas turbine combustor,” Spring Technical Meeting of the Eastern States Section of the Combustion Institute, State College, PA. Author copy here.

Samarasinghe, J., Culler, W., Quay, B., Santavicca, D. A., O’Connor, J. (2017) “The effect of fuel staging on the structure and instability characteristics of swirl-stabilized flames in a lean premixed multi-nozzle can combustor.” Journal of Engineering for Gas Turbines and Power, 139(12), 121504. Accepted author pre-print available here.

Culler, W., Samarasinghe, J., Quay, B., Santavicca, D. A., O’Connor, J. (2017) “The effect of transient fuel staging on self-excited instabilities in a multi-nozzle model gas turbine combustor,” ASME Turbo Expo, Charlotte, NC. Accepted author pre-print available here.

O’Connor, J., S. Hemchandra, T. Lieuwen, “Combustion Instabilities in Lean Premixed Systems.” Ed. D. Dunn-Rankin and P. Therkelsen, Lean Combustion: Technology and Control, Second Edition.

O’Connor, J., V. Acharya, T. Lieuwen, (2015) “Transverse Combustion Instabilities: Acoustic, Fluid Mechanic, and Flame Processes,” Progress in Energy and Combustion Science, 49, p. 1-39

Turbulent Flames

Tyagi, A., Boxx, I., Peluso, S., & O’Connor, J. (2020) “Pocket formation and behavior in turbulent premixed flames,” Combustion and Flame211, p. 312-324,

Tyagi, A., Boxx, I., Peluso, S., & O’Connor, J. (2019) “Statistics and topology of local flame-flame interactions in turbulent flames,” Combustion and Flame203, p. 92-104, Accepted author pre-print available here and supplementary material.

Tyagi, A., Boxx, I., Peluso, S., & O’Connor, J. (2019) “Statistics of local flame-flame interactions in flame interaction zones of two V-flames,” AIAA SciTech Forum, San Diego, CA. Accepted author pre-print available here.

Tyagi, A., Boxx, I., Peluso, S., & O’Connor, J. (2018). “The role of flow interaction in flame–flame interaction events in a dual burner experiment.” Proceedings of the Combustion Institute, 37(2), p. 3485-2491. Accepted author pre-print available here.

Shupp, R., Tyagi, A., Boxx, I., Peluso, S., O’Connor, J., (2018) “The effects of piloting on turbulent flame structure,” Spring Technical Meeting of the Eastern States Section of the Combustion Institute, State College, PA. Author version available here.

Tyagi, A., Boxx, I., Peluso, S., Shupp, R., O’Connor, J., (2018) “Topology of local flame-flame interaction events in turbulent flames,” Spring Technical Meeting of the Eastern States Section of the Combustion Institute, State College, PA. Author version available here.

Tyagi, A., Boxx, I., Peluso, S., Shupp, R., O’Connor, J., (2018) “Structure of flames in flame interaction zones,” AIAA SciTech, Kissimmee, FL. Accepted author pre-print available here.

Culler, W., A. Tyagi, P. Venkateswararn, J. O’Connor, (2016). “Comparison of Three Interacting V-Flames to a Single Bluff Body Flame at Two Reynolds Numbers,” AIAA SciTech. San Diego, CA. Accepted author pre-print available here.

Culler, W., J. Crane, R. J. Samarasinghe, M. Meehan, J. O’Connor, (2015) “Effect of Flame Spacing and Flow Velocity on the Dynamics of Three Interacting V-Flames,” in 9th U.S. National Combustion Meeting, Cincinnati, OH. Author version available here.

Unsteady Flows

Mason, D., Clees, S., Frederick, M., O’Connor, J., (2019) “The effects of exit boundary condition on precessing vortex core dynamics,” ASME Turbo Expo, Phoenix, AZ. Accepted author pre-print available here.

Dare, T. P., Berger, Z. P., Meehan, M., O’Connor, J. (2019). “Cluster-Based Reduced-Order Modeling to Capture Intermittent Dynamics of Interacting Wakes,” AIAA Journalin press. Author accepted pre-print available here.

Sebastian, J., Emerson, B., O’Connor, J., Lieuwen, T., (2018) “Spatio-temporal stability analysis of linear arrays of 2D density stratified wakes and jets,” Physics of Fluids30(11), P. 114103.

Meehan, M., Tyagi, A., O’Connor, J., (2018) “Flow dynamics in a variable-spacing, three bluff-body flowfield,” Physics of Fluids, 30, 025105. Author accepted pre-print available here and supplementary material.

Dare, T., Berger, Z., Meehan, M., O’Connor, J., (2018) “Cluster-based reduced-order modeling to capture intermittent dynamics of interacting wakes,” AIAA SciTech. Kissimmee, FL. Accepted author pre-print available here.

Clees, S., Lewalle, J., Frederick, M., O’Connor, J., (2018) “Vortex core dynamics in a swirling jet near vortex breakdown,” AIAA SciTech. Kissimmee, FL. Accepted author pre-print available here.

Frederick, M., Manoharan, K., Dudash, J., Brubaker, B., Hemchandra, S., O’Connor, J., (2018) “Impact of Precessing Vortex Core Dynamics on Shear Layer Response in a Swirling Jet,” Journal of Engineering for Gas Turbines and Power, 140(6), 061503. Accepted author pre-print available here.

O’Connor, J. (2017) “Disturbance Field Decomposition in a Transversely Forced Swirl Flow and Flame.” Journal of Propulsion and Power, 33(3), p. 750-763. Accepted author pre-print available here.

Mathews, B., S. Hansford, J. O’Connor, (2016) “Impact of Swirling Flow Structure on Shear Layer Vorticity Fluctuation Mechanisms,” ASME Turbo Expo, Seoul, South Korea

O’Connor, J. (2015) “Visualization of Shear Layer Dynamics in a Transversely Forced Flow and FlameAIAA Journal of Propulsion and Power, 32(4), p. 1127-1136. Accepted author pre-print available here.

Hansford, S., K. Manoharan, S. Hemchandra, J. O’Connor, (2015) “Impact of flow non-axisymmetry on swirling flow dynamics and receptivity to acoustics,” in ASME Turbo Expo, Montreal, Canada.

Manoharan, K., S. Hansford, J. O’Connor, S. Hemchandra, (2015) “Instability mechanism in a swirl flow combustor: Precession of vortex core and influence of density gradient,” in ASME Turbo Expo, Montreal, Canada

Combustor Emissions

Makwana, A., Jain, A.,  Linevsky, M., Iyer, S., Santoro, R., Litzinger, T., Xuan, Y., O’Connor, J., (2018) “Experimental and numerical investigation of effects of premixing on soot processes in iso-octane co-flow flames,” Proceedings of the Combustion Institute, 37(1), p. 1031-1039. Accepted author pre-print available here.

Makwana, A. K., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., & O’Connor, J. (2018). “Effect of aromatic fuels and premixing on aromatic species and soot distributions in laminar, co-flow flames at atmospheric pressure.” Combustion and Flame194, 164-174. Accepted author pre-print available here.

Makwana, A., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., O’Connor, J. (2018) “Effects of hydrogen addition on the structure of n-dodecane, laminar co-flow flame,” Spring Technical Meeting of the Eastern States Section of the Combustion Institute, State College, PA.

Makwana, A., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., O’Connor, J. (2018) “Effects of fuel volatility on emissions in a jet flame and a model gas turbine combustor,” Journal of Engineering for Gas Turbines and Power, 140(3), 031505. Accepted author pre-print available here.

Wang, Y., Makwana, A., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., O’Connor, J., (2018) “Effect of fuel Composition on Soot and Aromatic Species Distribution in Laminar, Co-Flow Flames, Part 1: non-Premixed FuelCombustion and Flame, 189, p. 443-455

Makwana, A., Wang, Y., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., O’Connor, J., (2018) “Effect of fuel Composition on Soot and Aromatic Species Distribution in Laminar, Co-Flow Flames, Part 2: Partially-Premixed FuelCombustion and Flame, 189, p. 456-471

Makwana, A., Iyer, S., Linevsky, M., Santoro, R., Litzinger, T., O’Connor, J. (2017) “Effect of aromatic fuels on aromatic species and soot distributions in laminar, co-flow, non-premixed flames at atmospheric pressure,” 10thS. National Combustion Meeting, College Park, MD.

Makwana, A., A. Jain, M. Linevsky, S. Iyer, R. Santoro, T. Litzinger, Y. Xuan, J. O’Connor, (2016) “Effects of fuel structure on soot precursors in a laminar co-flow flame,” Meeting of the Eastern States Section of the Combustion Institute, Princeton, NJ. Author version available here.

Makwana, A., Y. Wang, M. Linevsky, S. Iyer, R. Santoro, T. Litzinger, J. O’Connor, (2015) “Capturing Soot Formation with the Use of Iso-Octane as a Surrogate for Fischer-Tropsche Fuel,” in 9th U.S. National Combustion Meeting, Cincinnati, OH. Author version available here.

Hot Section Durability

Leonetti, M., Lynch, S., O’Connor, J., Bradshaw, S. (2017) “Combustor Dilution Hole Placement and Its Effect on the Turbine Inlet Flowfield.” Journal of Propulsion and Power, 33(3), p. 764-775.

Diesel Fuel Injection

O’Connor, J., Borz, M., Han, J., Paul, C., Ruth, D., Imren, A., Haworth, D., Martin, J., Sun, C., Boehman, A., Heffelfinger, K., Li, J., McLaughlin, S., Morton, R., Karlsson, A., Andersson, A. (2017) “Optimization of an advanced combustion strategy towards 55% BTE for the Volvo SuperTruck program.” SAE International Journal of Engines, 10(3), p. 1217-1227

Hessel, R., Yue, Z., Reitz, R., Musculus, M., O’Connor, J. (2017) “Guidelines for Interpreting Soot Luminosity Imaging“, SAE International Journal of Engines, 10(3), p. 1174-1192.

Ruth, D., J. O’Connor, (2017) “Development and Verification of Reduced-Order Model for Diesel Spray Penetration and Spreading during Wall Impingement,” SAE Congress, Detroit, MI. SAE Technical Paper 2017-01-0814

O’Connor, J., M. Musculus, L. Pickett, (2016) “Effect of post injections on mixture preparation and unburned hydrocarbon emissions in a heavy-duty diesel engine,” Combustion and Flame, 170, p. 111-123

Borz, M., Y. Kim, J. O’Connor, (2016) “The Effect of Injection Timing and Duration on Jet Penetration and Mixing in Multiple Injection Schedules 2016 SAE Congress, Detroit, MI

O’Connor, J. (2016) “Use of advanced fuel injection strategies for emissions reduction in diesel engines,” Meeting of the Eastern States Section of the Combustion Institute, Princeton, NJ

Hessel, R., Yue, Z., Reitz, R., Musculus, M., & O’Connor, J. (2015). “Applying Advanced CFD Analysis Tools to Study Differences between Start-of-Main and Start-of-Post Injection Flow, Temperature and Chemistry Fields Due to Combustion of Main-Injected Fuel.” SAE International Journal of Engines, 8(5), p. 2159-2176.

O’Connor, J. and M. Musculus, (2014) “Effect of Load on Close-Coupled Post-Injection Efficacy for Soot Reduction in an Optical, Heavy-Duty Diesel Research Engine,” Journal of Engineering for Gas Turbines and Power, 136(10), p. 101508

O’Connor, J. and M. Musculus, (2014) “In-Cylinder Mechanisms of Soot Reduction by Close-Coupled Post-Injections as Revealed by Imaging of Soot Luminosity and Planar Laser-Induced Soot Incandescence in a Heavy-Duty Diesel Engine,” SAE Int. J. Engines, 7(2), p. 673-693

Hessel, R., R. Reitz, M. Musculus, J. O’Connor, and D. Flowers, (2014) “A CFD Study of Post Injection Influences on Soot Formation and Oxidation under Diesel-Like Operating Conditions,” SAE Int. J. Engines, 7(2), p. 694-713

O’Connor, J. and M. Musculus, (2014) “Effects of exhaust gas recirculation and load on soot in a heavy-duty optical diesel engine with close-coupled post injections for high-efficiency combustion phasing,” International Journal of Engine Research, 14(4), p. 421-443