Noel T. Clemens

 

 

Publications

      1. Combs, C.S., Lochman, B.J., Narayanaswamy, V. and Clemens, N.T., "Technique for Studying Ablation Products Transport in Supersonic Boundary Layers by using PLIF of Naphthalene," Experiments in Fluids, submitted.

      2. Combs, C.S. and Clemens, N.T., "Naphthalene Laser-Induced Fluorescence Measurements at Low Temperature and Pressure," Applied Optics, to be published, 2016.

      3. Ebi, D. and Clemens, N.T., "Experimental investigation of upstream flame propagation during boundary layer flashback of swirl flames," Combustion and Flame, to be published, 2016.

      4. Ebi, D. and Clemens, N.T., "Simultaneous high-speed 3D flame front detection and tomographic PIV," Measurement Science and Technology, to be published, 2016.

      5. Greene, B.R., Clemens, N.T., Magari, P. and Micka, D., "Control of Mean Separation in Shock Boundary Layer Interaction Using Pulsed Plasma Jets," Shock Waves, Vol. 25, Issue 5, pp. 495-505, 2015.

      6. Clemens, N.T. and Narayanaswamy, V., "Low-Frequency Unsteadiness of Shock Wave/Turbulent Boundary Layer Interactions," Annual Review of Fluid Mechanics, Vol. 46, pp. 469-492, 2014.

      7. Burns, R., Koo, H., Raman, V. and Clemens, N.T., "Improved Large-Eddy Simulation Validation Methodology: Application to a Supersonic Inlet/Isolator Flow," AIAA Journal,Vol. 53, No. 4, pp. 817-831, 2015.

      8. Combs, C.S., Clemens, N.T., Danehy, P.M., Bathel, B., Parker, R., Wadhams, T., Holden, M. and Kirk, B., "Planar Laser-Induced Fluorescence of Orion Capsule Reaction Control System Jets in a Shock Tunnel," Journal of Spacecraft and Rockets, Vol. 52, pp. 243-252, Jan. 2015.

      9. Hutchins, K., Akella, M., Clemens, N.T., Donbar, J. and Gogineni, S., "Experimental Identification of Transient Dynamics for Hypersonic Inlet Unstart," Journal of Propulsion and Power, Vol. 30, pp. 1605-1612, 2014.

      10. Valdivia, A., Yuceil, K.B., Wagner, J.L., Clemens, N.T. and Dolling, D.S., "Active Control of Supersonic Inlet Unstart Using Vortex Generator Jets," AIAA Journal, Vol. 52, pp. 1207-1218, 2014.

      11. Narayanaswamy, V. and Clemens, N.T., "Simultaneous LII and PIV measurements in the soot formation region of turbulent non-premixed jet flames," Proceedings of the Combustion Institute, Vol. 34, pp. 1455-1463, 2013.

      12. Gamba, M., Clemens, N.T. and Ezekoye, O.E., "Volumetric PIV and 2D OH PLIF Imaging in the Far-Field of a Low-Reynolds Number Nonpremixed Jet Flame," Measurement Science and Technology, Vol. 24, 024003 (20 pages), 2013.

      13. Donbar, J.M., Hutzel, J.R., Decker, D.D., Hutchins, K.E., Akella, M.R., Clemens, N.T., Zinnecker, A.M. and Serrani, A., "Recent Developments in Scramjet Unstart Control Research," The JANNAF Journal of Propulsion and Energetics, Vol. 6, 2013

      14. Narayanaswamy, V., Raja, L.L. and Clemens, N.T., "Control of Unsteadiness of a Shock Wave / Turbulent Boundary layer Interaction by using a Pulsed-Plasma Jet Actuator," Physics of Fluids, Vol. 24, pg. 076101 (22 pages), 2012.

      15. Narayanaswamy, V., Raja, L.L. and Clemens, N.T., "Method for acquiring pressure measurements in presence of plasma-induced interference for supersonic flow control applications," Measurement Science and Technology, Vol. 22, 125107 (11 pages), 2011.

      16. Narayanaswamy, V., Burns, R. and Clemens, N.T., "Planar Laser-Induced Fluorescence of Krypton for Scalar Imaging in Supersonic Flows," Optics Letters, Vol. 36, No. 21, pp. 4185-4187, 2011.

      17. Marr, K., Clemens, N.T. and Ezekoye, O.E., "Mixing Characteristics and Emissions of Strongly-Forced Non-Premixed and Partially Premixed Jet Flames in Crossflow," Combustion and Flame, Vol. 159, pp. 707-721, 2012.

      18. Narayanaswamy, V., Raja, L.L. and Clemens, N.T., "Control of a shock/ boundary layer interaction by using a pulsed-plasma jet actuator," AIAA Journal, Vol. 50, No. 1, pp. 246-249, 2012.

      19. Hsu, A.,Narayanaswamy, V., Clemens, N. T. and Frank, J.H., "Mixture Fraction Imaging in Turbulent Non-premixed Flames with Two-photon LIF of Krypton," Proceedings of the Combustion Institute, Vol. 33, pp. 759-766, 2011.

      20. Srikant, S., Wagner, J.L., Valdivia, A., Akella, M.R., and Clemens, N.T., "Unstart Detection in a Simplied-Geometry Hypersonic Inlet-Isolator Flow," Journal of Propulsion and Power, Vol 26, No. 5, pp. 1059-1071, 2010.

      21. Wagner, J., Yuceil, K.B., Clemens, N.T., "Velocimetry Measurements of Unstart of an Inlet/Isolator Model in a Mach 5 Flow," AIAA Journal, Vol. 48, no. 9, pp. 1875-1888, 2010.

      22. Meier, W., Boxx, I., Arndt, C., Gamba, M. and Clemens, N.T., "Investigation of Auto-ignition of a Pulsed Methane Jet in Vitiated Air Using High-Speed Imaging Techniques," Journal of Engineering for Gas Turbines and Power, Vol. 133, Issue 2, pp. 021504 - 021509, 2011.

      23. Narayanaswamy, V., Raja, L.L. and Clemens, N.T., "Characterization of a high-frequency pulsed plasma jet actuator,"AIAA Journal, Vol. 48, No. 2, pp. 297-305, February 2010.

      24. Ganapathisubramani, B., Clemens, N.T. and Dolling, D.S., "Low-Frequency Dynamics of Shock-Wave/Boundary-Layer Interactions," Journal of Fluid Mechanics, Vol. 636, pp. 397-425, 2009.

      25. Barve, V.V.,Clemens, N.T. and Ezekoye, O.E., "Soot Reduction in Strongly Forced Lifted CH4-Air Laminar Flames," Combustion Theory and Modelling, Vol. 13, Issue 4, pp. 671--703, 2009.

      26. Wagner, J., Yuceil, K.B., Valdivia, A., Clemens, N.T. and Dolling, D.S., "Experimental Investigation of Unstart in an Inlet/Isolator Model in Mach 5 Flow," AIAA Journal, Vol. 47, No. 6, pp. 1528-1542, 2009.

      27. Shin, J., Clemens, N.T., and Raja, L.L., "Schlieren Imaging of Flow Actuation Produced by Direct-Current Surface Glow Discharge in Supersonic Flows," IEEE Transactions on Plasma Science, Vol. 36, No. 4, August 2008.

      28. Ganapathisubramani, B., Lakshminarasimhan, K. and Clemens, N. T., "Experimental Investigation of Fine Scales in the Far Field of a Turbulent Jet" Journal of Fluid Mechanics, Vol. 598, pp. 141-175, 2008.

      29. Wang, G.-H., Clemens, N.T., Varghese, P.L. and Barlow, R.S., "Turbulent Time Scales in a Nonpremixed Turbulent Jet Flame by Using High-Repetition Rate Thermometry," Combustion and Flame, Vol. 152, pp. 317-335, 2008.

      30. Ganapathisubramani, B., Clemens, N. T. and Dolling, D.S., "Effects of Upstream Boundary Layer on the Unsteadiness of Shock Induced Separation," Journal of Fluid Mechanics, Vol. 585, pp. 369-394, 2007.

      31. Shin, J., Narayanaswamy, V., Raja, L.L., Clemens, N.T., "Characterization of a Direct-Current Glow Discharge Plasma Actuator in Low-Pressure Supersonic Flow," AIAA Journal, Vol. 45, No. 7, pp. 1596-1605, 2007.

      32. Ganapathisubramani, B., Lakshminarasimhan, K. and Clemens, N. T., "Determination of Complete Velocity Gradient Tensor by using Cinematographic Stereoscopic PIV in a Turbulent Jet," Experiments in Fluids, Vol. 42, No. 6, pp. 923-939, 2007.

      33. Lakshminarasimhan, K., Clemens,  N.T.  and Ezekoye, O. A., "Mixing Characteristics in Strongly-Forced Nonpremixed Methane Jet Flames," Proceedings of the Combustion Institute, Vol. 31, Issue 1, Pages 1617-1624, 2007.

      34. Wang, G.H., Barlow, R.S. and Clemens, N.T., "Quantification of Resolution and Noise Effects on Thermal Dissipation Measurements in Turbulent Non-premixed Jet Flames," Proceedings of the Combustion Institute, Vol. 31, Issue 1, Pages 1525-1532, 2007.

      35. Wang, G.-H., Clemens, N.T., Barlow, R.S. and Varghese, P.V., "A System Model for Assessing Scalar Dissipation Measurement Accuracy in Turbulent Flows," Measurement Science and Technology, Vol. 18, pp. 1287-1303, 2007.

      36. Miller, D.A., Gamba, M., Sauer, D., Purvis, T.P., Clemens, N.T. and Williams, R.O., "Evaluation of the USP Dissolution Test Method A for Enteric-Coated Articles by Planar Laser Induced Fluorescence," International Journal of Pharmaceutics, Vol. 330, pp. 61-72, 2007.

      37. Lakshminarasimhan, K., Clemens, N.T.  and Ezekoye, O. A., "Characteristics of Strongly-Forced Turbulent Nonpremixed Jet Flames," Experiments in Fluids, Vol. 41, pp. 523-542, 2006.

      38. Ganapathisubramani, B. and Clemens, N. T., "A Note on the Effect of Laser Pulse Duration on Particle Image Velocimetry," AIAA Journal, Vol. 44, No. 6, pp. 1368-1370, June 2006.

      39. Barve, V.V., Ezekoye, O.A., Clemens, N.T. and Katta, V.R., "Numerical Study of the Evolution of Strongly Forced Axisymmetric Laminar Cold-Flow Jets," AIAA Journal, Vol. 44, No.8, pp. 1742-1752, August 2006.

      40. Ganapathisubramani, B., Clemens, N. T. and Dolling, D.S., "Large-Scale Motions in a Supersonic Turbulent Boundary Layer," Journal of Fluid Mechanics, Vol. 556, pp. 271-282, 2006.

      41. Kothnur, P.S. and Clemens, N.T., "Effects of Unsteady Strain Rate on Scalar Dissipation Structures in Turbulent Planar Jets," Physics of Fluids, Vol. 17, Issue 12, article 125104, 2006.

      42. Wang, G, Clemens, N.T.  and Varghese, P.L.,  "Two-Point, High-Repetition Rate Rayleigh Thermometry in Flames: Techniques to Correct for Apparent Dissipation Induced by Noise," Applied Optics, Vol. 44, Issue 31, pp. 6741-6751, 2005.

      43. Hou, Y.X., Unalmis, O.H., Bueno, P.C., Clemens,  N. T.  and Dolling, D. S., "Role of Upstream Boundary Layer Velocity Fluctuations on Unsteadiness of Mach 5 Blunt-Fin Interactions,"  AIAA Journal, Vol. 42, No. 12, pp. 2615-2619, 2004.

      44. Wang, G., Clemens, N.T. and Varghese, P.L., "High-Repetition Rate Measurements of Temperature and Thermal Dissipation in a Nonpremixed Turbulent Jet Flame," Proceedings of the Combustion Institute, Vol. 30, pp. 691-699, 2005.

      45. Unalmis, O. H., Clemens, N. T. and Dolling, D. S., "Cavity Oscillation Mechanisms in High-Speed Flows," AIAA Journal, Vol. 40, No. 10, pp. 2035-2041, 2004.

      46. Idicheria, C.A., Boxx, I.G. and Clemens, N.T., "Characteristics of Turbulent Nonpremixed Jet Flames under Normal- and Low-Gravity Conditions,"  Combustion and Flame, Vol. 138, pp. 384-400, 2004.

      47. Wang, G.H. and Clemens, N.T., "Effects of Imaging System Blur on Measurements of Flow Scalars and Scalar-Gradients," Experiments in Fluids, Vol. 37, pp. 194-205, 2004.

      48. Su, L.K. and Clemens, N.T., "The Structure of Fine-Scale Scalar Mixing in Gas-Phase Planar Turbulent Jets," Journal of Fluid Mechanics, Vol. 488, pp. 1-29, 2003.

      49. Beresh, S.J., Clemens, N.T. and Dolling, D.S., "The Relationship between Upstream Turbulent Boundary Layer Velocity Fluctuations and Separation Shock Unsteadiness," AIAA Journal, Vol. 40, No. 12, pp. 2412-2422, 2002.

      50. Kothnur, P.S., Tsurikov, M.S., Clemens, N.T., Donbar, J.M. and Carter, C.D., "Planar Imaging of CH, OH and Velocity in Turbulent Non-Premixed Jet Flames," Proceedings of the Combustion Institute, Vol. 29, pp. 1921-1927, 2002.

      51. Kim, J. U., Clemens, N.T. and Varghese, P.L., "Experimental Study of the Transient Underexpanded Jet Generated by an Electrothermal Capillary Plasma," AIAA Journal of Propulsion and Power, Vol. 18, No. 6, pp. 1153-1160, 2002.

      52. Kim, J.U., Clemens, N.T. and Varghese, P.L., "Characterization of a High-Density Plasma Produced by Electrothermal Capillary Discharge," Applied Physics Letters, Vol. 80, pp. 368-370, 2002 and Vol. 80, p. 2806, 2002 (Erratum-Gives correct author list).

      53. Clemens, N. T., "Flow Imaging," In Encyclopedia of Imaging Science and Technology, John Wiley and Sons, New York, 2002. (Get the pdf file here pdficon )

      54. Unalmis, O.H., Clemens, N.T. and Dolling, D.S., "Experimental Study of Shear-Layer/Acoustics Coupling in Mach 5 Cavity Flow" AIAA Journal, Vol. 39, No. 2, pp.242-252, 2001.

      55. Kim, J.U., Kim, K., Wilson, D.E., Peterson, D.R.  and Clemens, N.T., "Neutralization of Explosives by Plasma Jet Impingement: Feasibility Study," IEEE Transactions on Plasma Science, Vol. 28, No.1, pp. 312, 2000.

      56. Su, L.K. and Clemens, N.T.,  "Planar Measurements of the Full Three-Dimensional Scalar Dissipation Rate in Gas-Phase Turbulent Flows" Experiments in Fluids, Vol. 27, pp. 507-521, 1999.

      57. Rehm, J.E. and Clemens, N.T.,  "An Improved Method for Enhancing Resolution of Conventional Double-Exposure Single-Frame Particle Image Velocimetry," Experiments in Fluids, Vol. 26, pp. 497-504, 1999.

      58. Rehm, J.E. and Clemens, N.T., "The Large-Scale Turbulent Structure of Planar Jet Diffusion Flames" Combustion & Flame, Vol. 116, pp. 615-626, 1999.

      59. Kohel, J., Su, L.K., Clemens, N.T.  and Varghese, P.L., "Emission Spectroscopic Measurements and Analysis of a Pulsed Plasma Jet" IEEE Transactions on Magnetics, Vol. 35, p. 201, 1999.

      60. Clemens, N.T.  and Smith, M.F., "Observations of Supersonic Flat Plate Wake Transition" AIAA Journal, Vol. 36, pp. 1328-1330, 1998.

      61. Lachney, E.R. and Clemens, N.T., "PLIF Imaging of Mean Temperature and Pressure in a Supersonic Bluff Wake," Experiments in Fluids, Vol. 24, No. 4, pp. 354 - 363, 1998.

      62. Rehm, J.E. and Clemens, N.T., "The Relationship Between Vorticity/Strain and Reaction Zone Structure in Turbulent Non-Premixed Jet Flames" Twenty Seventh Symposium on Combustion, pp. 1113-1120, 1998.

      63. Clemens, N.T., Paul, P.H. and Mungal, M.G., "The Structure of OH Fields in High Reynolds Number Turbulent Jet Diffusion Flames" Combustion Science and Technology, Vol 129, pp. 165-184, 1997.

      64. Rehm, J.E. and Clemens, N.T., "Hydrogen/Helium Planar Turbulent Diffusion Flames," Physics of Fluids, Vol. 9, No. 9, p. S3, September 1997.

      65. Clemens, N.T., Petullo, S.P. and Dolling, D.S., "Large-Scale Structure Evolution in Supersonic Interacting Shear Layers" AIAA Journal, Vol. 34, pp. 2062-2070, 1996.

      66. Clemens, N.T. and Paul, P.H.,  "The Effects of Heat Release on the Near Field Flow Structure of Hydrogen Jet Diffusion Flames" Combustion & Flame, Vol. 102, No. 3, pp. 271-284, 1995.

      67. Clemens, N.T.  and M. G. Mungal, "Large-Scale Structure and Entrainment in the Supersonic Shear Layer" Journal of Fluid Mechanics, Vol. 284, pp. 171-216, 1995.

      68. Clemens, N.T. and P. H. Paul, "Scalar Measurements in Supersonic Axisymmetric Mixing Layers" Physics of Fluids, vol. 7, No. 5, pp. 1071-1081, 1995.

      69. Paul, P.H. and Clemens, N.T., "Sub-Resolution Flowfield Mixing Measurements Using Electronic Quenching of NO A2S+" Optics Letters, vol. 18, pp. 161-163, 1993.

      70. Clemens, N.T. and Paul, P.H., "Mach Waves Radiating from a Supersonic Jet," Physics of Fluids A., Vol. 5, pg. S7, 1993.

      71. Clemens, N.T. and Mungal, M.G., "Two- and Three-Dimensional Effects in the Supersonic Mixing Layer" AIAA Journal, vol. 30, No. 4, pp. 973-981, 1992.

      72. Clemens, N.T. and Mungal, M.G., "A Planar Mie Scattering Technique for Visualizing Supersonic Mixing Flows" Experiments in Fluids, vol. 22, pp. 175-185, 1991.

      73. Clemens, N.T. and Mungal, M.G., "Effects of Side-Wall Disturbances on the Supersonic Mixing Layer," Journal of Propulsion and Power, vol. 8, No. 1, pp. 249-251, 1991.

 

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