Noel T. Clemens

 

 

Journal Publications

1. Ganapathisubramani, B., Lakshminarasimhan, K. and Clemens, N. T., "Experimental Investigation of Fine Scales in the Far Field of a Turbulent Jet" to be published in the Journal of Fluid Mechanics, 2008.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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, to be published, 2007.

7. 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, to be published, 2007.

8. 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.

9. 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.

10. 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.

11. 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.

12. 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.

13. 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.

14. 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.

15. 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.

16. Hou, Y.X., Ünalmis, 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.

17. 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.

18. 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.

19. 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.

20. 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.

21. 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.

22. 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.

23. 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.

24. 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.

25. 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).

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

27. Ünalmis, 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.

28. 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.

29. 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.

30. 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.

31. 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.

32. 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.

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

34. 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.

35. 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.

36. 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.

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

38. 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.

39. 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.

40. 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.

41. 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.

42. 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.

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

44. 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.

45. 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.

46. 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.

 

 

Recent Conference Papers

 

1. Shin, J., Narayanaswamy, V., Raja, L.L. and Clemens, N.T., "Characteristics of a Plasma Actuator in Mach 3 Flow," paper AIAA-2007-788, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 8-11, 2007.

2. Gamba, M., Clemens, N.T. and Ezekoye, D.K., "Strongly Forced Turbulent Non-Premixed Jet Flames in Cross-Flow," paper AIAA-2007-1418, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 8-11, 2007.

3. Murphree, Z., Yuceil, B., Clemens, N.T. and Dolling, D.S., "Experimental Studies of Transitional Boundary Layer Shock Wave Interactions ," paper AIAA-2007-14139, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 8-11, 2007.

4.  Murphree, Z.R., Jagodzinski, J., Hood, Jr., E.S., Clemens, N.T. and Dolling, D.S. "Experimental Studies of Transitional Boundary Layer Shock Wave Interactions," AIAA-2006-326-768, 44th AIAA Aerospace Sciences Meeting and Exhibit. Reno, Nevada, January 2006.

5. Ganapathisubramani, B., Clemens, N.T. and Dolling, D.S., "Planar Imaging Measurements to Study the Effect of Spanwise Structure of Upstream Turbulent Boundary Layer on Shock Induced Separation," AIAA-2006-324, 44th AIAA Aerospace Sciences Meeting and Exhibit. Reno, Nevada January 2006.

6. Ganapathisubramani, B., Lakshminarasimhan, K. and Clemens, N. T., "Cinematographic Stereoscopic PIV of a Turbulent Jet: Assessment of Accuracy of 3D Derived Quantities,"  paper AIAA-2006-2806, 25th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, San Francisco, California, June 5-8, 2006.

7. Ryan, M., Clemens, N. and Varghese, P., "Spectroscopic Measurements during an Electrothermal Plasma-JA2 Solid Propellant Interaction," AIAA-2006-1464, 44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 9-12, 2006.

8. Shin, J., Narayanaswamy, V., Raja, L.L. and Clemens, N. "Generation of Plasma Induced Flow Actuation by DC Glow-like Discharge in a Supersonic Flow," AIAA-2006-169-953, 44th AIAA Aerospace Sciences Meeting and Exhibit. Reno, Nevada January 2006.

9. Gamba, M., Clemens, N., Ezekoye, O. and Boxx, I., "Experimental Study of Acoustically-Forced Jet Flames under Low- and Normal-Gravity Conditions," paper AIAA-2006-1135, 44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 9-12, 2006.

10. Barve, V., Clemens, N., Ezekoye, O. and Katta, V., "Soot Production Rates in Strongly Forced Methane-Air Laminar Diffusion Flames," AIAA-2006-3286 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, San Francisco, California, June 5-8, 2006.

11. P. Bueno, Ganapathisubramani, B., Clemens, N.T and Dolling, D.S., "Cinematographic Planar Imaging of a Mach 2 Shock Wave / Turbulent Boundary Layer Interaction," AIAA paper 2005-0441, 43rd Aerospace Sciences Meeting, January 2005.

12. K. Lakshminarasimhan, Clemens, N.T and Ezekoye, O.A., "Flow and Flame Characteristics of Strongly Pulsed Methane Jet Diffusion Flames," 4th Joint Meeting of the U.S. Sections of the Combustion Institute, Philadelphia, PA, 2005.

13. G.H. Wang, Clemens, N.T. and Varghese, P.L., "High-Repetition Rate, Two-Point Temperature Measurements in Nonpremixed Turbulent Jet Flames," Proceedings of the Spring 2004 Technical Meeting of the Central States Section of the Combustion Institute.

14. P. Bueno, Hou, Y.X., Clemens, N.T and Dolling, D.S., "Wide-Field PIV Study of the Effect of Pulsed Jet Injection Upstream of a Mach 2 Shock Wave/Turbulent Boundary Layer Interaction," AIAA paper 2004-0707, 42nd Aerospace Sciences Meeting, January 2004.

15. C.A. Idicheria, Boxx, I.G. and Clemens, N. T., "The Turbulent Structure and Entrainment of Nonpremixed Jet Flames in Normal- and Low-Gravity Conditions," Proceedings of the Spring 2004 Technical Meeting of the Central States Section of the Combustion Institute.

16. Boxx, I.G. and Clemens, N.T., "Kilohertz PIV/PLMS of low-gravity turbulent flames in a drop tower," 12th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 2004.

17. Ryan, M., Clemens, N.T and Varghese, P.L., "Measurements of Electrothermal-Plasma Ignition of Solid Propellants," AIAA paper 2004-0388, 42nd Aerospace Sciences Meeting, January 2004

18. F. Bisetti, Clemens, N.T. and Ezekoye, O.A., "Flame Length and Exit Plane Mixing in Resonantly Excited Jet Diffusion Flames," paper TED-AJ03-408, The 6th ASME-JSME Thermal Engineering Joint Conference, March 2003.

19. Bueno, P., Hou, Y.X., Clemens, N.T and Dolling, D.S., "A PIV Study on the Effect of Pulsed-Jet Injection Upstream of a Mach 2 Shock Wave/Turbulent Boundary Layer Interaction," Presented at the 20th International Congress on Instrumentation in Aerospace Simulation Facilities, Göttingen, Germany, August 2003.

20. C.A. Idicheria, Boxx, I.G. and Clemens, N. T., "Characteristics of Turbulent Nonpremixed Jet Flames in Different Gravity Levels," Proceedings of the Third Joint Meeting of the U.S. Sections of The Combustion Institute, March 2003.

21. Y.X. Hou, Clemens, N.T. and Dolling, D.S., "Wide-Field PIV Study of Shock-Induced Turbulent Boundary Layer Separation," AIAA paper 2003-0441, 41st Aerospace Sciences Meeting, January 2003.

22. I.G. Boxx, C. A. Idicheria and N. T. Clemens, "A Quantitative Exploration of the Large-scale Flow Structure of Turbulent Nonpremixed Flames under Standard- and Micro-Gravity Conditions," AIAA 2003-1151, 41st Aerospace Sciences Meeting and Exhibit, January 2003.

23. Y.X. Hou, Clemens, N.T. and Dolling, D.S., "Development of a Multi-Camera PIV Imaging System for Studies of Shock/Boundary Layer Interactions," AIAA paper 2002-3232, 22nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, June 2002.

24. M. S. Tsurikov & Clemens, N. T., "The Structure of Dissipative Scales in Axisymmetric Turbulent Gas-Phase Jets," AIAA paper 2002-0164, 40th Aerospace Sciences Meeting, January 2002.

25. P.C. Bueno, Ünalmis, O.H., Clemens, N.T. and Dolling, D.S., "The Effects of Upstream Mass Injection on a Mach 2 Cavity Flow," AIAA paper 2002-0663, 40th Aerospace Sciences Meeting, January 2002.

26. P. S. Kothnur, Tsurikov, M.S., Clemens, N. T., Donbar, J.M. and Carter, C.D., "Planar Imaging of CH / OH and Velocity in Turbulent Nonpremixed Jet Flames," AIAA-2002-0167, 40th Aerospace Sciences Meeting, January 2002.

27. M. S. Tsurikov and N. T. Clemens, "Scalar / velocity imaging of the fine scales in gas-phase turbulent jets," AIAA 2001-0147, 39th Aerospace Sciences Mtg., Reno, NV, 2001.

28. P. S. Kothnur and N. T. Clemens, "Experimental Investigation of the Relationship between Strain and Scalar Dissipation in Gas-Phase Turbulent Jets," AIAA 2001-1023, 39th Aerospace Sciences Mtg., Reno, NV, 2001.

29. C. A. Idicheria, I.G. Boxx and N. T. Clemens, "Large-scale flow structure in turbulent nonpremixed flames under normal- and low-gravity conditions," AIAA 2001-0628, 39th Aerospace Sciences Mtg., Reno, NV, 2001.

30. O.H. Ünalmis, Y.X. Hou, P.C. Bueno, N. T. Clemens and D.S. Dolling, "PIV investigation of role of boundary layer velocity fluctuations in unsteady shock-induced separation," AIAA 2000-2450, 21st Aerodynamic Measurement Technology and Ground Testing Conference, Denver, CO, 2000.

 

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