Lt Col James L. Rutledge, Ph.D., P.E.

Associate Professor

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DSN: 785-3636 x4734
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BS, Mechanical Engineering, University of Texas at Austin, 2002; MS, Mechanical Engineering, University of Texas at Austin, 2004; PhD, Aeronautical Engineering, Air Force Institute of Technology, 2009.  As an Associate Professor and Senior Military Faculty at AFIT, Lt Col Rutledge’s research interests include experimental and computational investigations of gas turbine heat transfer, unsteady fluid mechanics, inverse heat transfer and aerothermodynamics.  Lt Col Rutledge is a fellow of ASME, senior member of AIAA and a member of Tau Beta Pi and the ASME K-14 Gas Turbine Heat Transfer Committee.  He is a licensed Professional Engineer in the State of Texas and has deployed to Afghanistan in support of Operation Enduring Freedom.

 

Professional Engineer, State of Texas

Awards

2021       Outstanding Science & Engineering Educator, United States Air Force

2021       Best Paper in Heat Transfer for ASME Turbo Expo 2020

2021       Dean’s Distinguished Teaching Professor

2020       AFIT Graduate School of Engineering and Management Research Award

2020       Named Fellow of ASME

2020       Outstanding Science & Engineering Educator, Air Force Materiel Command

2020       Best Paper in Heat Transfer for ASME Turbo Expo 2019

2019       Outstanding Scientist / Engineer – Senior Military, Air Education and Training Command

2018       AFIT Educator of the Year

2018       Best Paper in Heat Transfer for ASME Turbo Expo 2017

2018       AFIT Outstanding Military Faculty

2015       Outstanding Scientist / Engineer – Mid-Career Military, Air Education and Training Command

Publications

Patents:

Pickl, C.W., Rutledge, J.L., Polanka, M.D., Harkless, C., Crabtree, B., 12 May 2020, “Wind Tunnel Wake Generator,” U.S. Patent No. 10,648,882 B2.

Rutledge, J.L. and McCall, J.F., 19 April 2016, “A Method to Determine Time-Resolved Waveforms of Periodic Unsteady Heat Transfer Coefficient and Adiabatic Wall Temperature,” U.S. Patent No. 9,316,547 B1.

Archived Journal Publications:

33.  Wiese, C.J., Rutledge, J.L., 2021, “The Effects of Specific Heat and Viscosity on Film Cooling Behavior,” Journal of Turbomachinery, Vol. 143, No. 4.

32.  McNamara, L.J., Fischer, J.P., Rutledge, J.L., Polanka, M.D., 2021, “Scaling Considerations for Thermal and Pressure Sensitive Paint Methods Used to Determine Adiabatic Effectiveness,” Journal of Turbomachinery, Vol. 143, No. 1.

31.  Fischer, J.P., McNamara, L.J., Rutledge, J.L., Polanka, M.D., 2020, “Scaling Flat-Plate, Low-Temperature Adiabatic Effectiveness Results Using the Advective Capacity Ratio,” Journal of Turbomachinery, Vol. 142, No. 8.

30.  Bryant, C.E. and Rutledge, J.L., 2020, “A Computational Technique to Evaluate the Relative Influence of Internal and External Cooling on Overall Effectiveness,” Journal of Turbomachinery, Vol. 142, No. 5.

29.  Paxton, J.C., Reeder, M.F., Dean, E.F., Cahill, D.A., Rutledge, J.L., Petrosky, J.C., “Effect of Upstream Heating Examined Via the Wind-Tunnel Enhanced Experimental Irradiation Test System,” Journal of Radiation Effects, Research and Engineering, Vol. 38, No. 1.

28. Bohan, B.T., Polanka, M.D., Rutledge, J.L., 2019, “Sweeping Jets Issuing From the Face of a Backward-Facing Step,” Journal of Fluids Engineering, Vol. 141, No. 12.

27. DeMarco, K.J., Bohan, B.T., Polanka, M.D., Rutledge, J.L., Akbari, P., 2019, “Analysis of an Additively Manufactured Cooled Ultra Compact Combustor Vane,” Journal of Thermal Science and Engineering Applications, Vol. 11, No. 5.

26. Bryant, C.E., Wiese, C.J., Rutledge, J.L., Polanka, M.D., 2019, “Experimental Evaluations of the Relative Contributions to Overall Effectiveness in Turbine Blade Leading Edge Cooling,” Journal of Turbomachinery, Vol. 141, No. 4, DOI: 10.1115/1.4041645.

25. Rutledge, J.L., Baker, W.P., 2018, “Unsteady Effects on the Experimental Determination of Overall Effectiveness,” Journal of Turbomachinery, Vol. 140, No. 12, 121005, DOI: 10.1115/1.4041233.

24. Wiese, C.J., Bryant, C.E., Rutledge, J.L., Polanka, M.D., 2018, “Influence of Scaling Parameters and Gas Properties on Overall Effectiveness on a Leading Edge Showerhead,” Journal of Turbomachinery, Vol 140, No. 11, 111007, DOI: 10.1115/1.4041292.

23. Greiner, N.J., Polanka, M.D., Rutledge, J.L., 2018, “Impact of Wall Boundary Condition on Scaling Film Cooling Performance from Near Ambient to Engine Temperatures,” International Journal of Thermal Sciences, Vol. 132, October 2018, pp. 378-386.

22.  Bills, J.D., Crowe, D.S., Rutledge, J.L., Coy, E.B., 2018, “Modeling Fuel Film Cooling on a Flat Plate,” Journal of Thermophysics and Heat Transfer, Vol. 32, No. 3, pp. 736-746, DOI: 10.2514/1.T5257.

21. Wiese, C.J., Rutledge, J.L., Polanka, M.D., 2018, “Experimental Evaluation of Thermal and Mass Transfer Techniques to Measure Adiabatic Effectiveness with Various Coolant to Freestream Property Ratios,” Journal of Turbomachinery, Vol. 140, No. 2, February, 021001, DOI: 10.1115/1.4038177.

20. Rutledge, J.L., Polanka, M.D., Greiner, N.J., 2017, "Computational Fluid Dynamics Evaluations of Film Cooling Flow Scaling Between Engine and Experimental Conditions," Journal of Turbomachinery, Vol. 139, No. 2, 021004, DOI: 10.1115/1.4034557.

19. Polanka, M.D., Rutledge, J.L., Bogard, D.G., and Anthony, R.J., 2017, “Determination of Cooling Parameters for a High Speed, True Scale, Metallic Turbine Vane”, Journal of Turbomachinery, Vol. 139, No. 1, 011001, DOI: 10.1115/1.4033974.

18. Shewhart, A.T., Lynch, A.J., Greiner, N.J., Polanka, M.D., Rutledge, J.L., 2016, “Mitigation of Heat Release from Film Cooling in Fuel-Rich Environments,” Journal of Propulsion and Power, Vol. 32, No. 6, pp. 1454-1461, DOI: 10.2514/1.B35903.

17. Greiner, N.J., Polanka, M.D., Rutledge, J.L., and Shewhart, A.T., 2016, “Effect of Variable Properties and Radiation on Convective Heat Transfer Measurements at Engine Conditions,” Journal of Heat Transfer, Vol. 138, No. 11, 112002, DOI: 10.1115/1.4033537.

16. Rutledge, J.L., Rathsack, T.C., Van Voorhis, M., Polanka, M.D., 2016, “Film Cooling Parameter Waveforms on a Film Cooled Turbine Blade Leading Edge With Oscillating Stagnation Line,” Journal of Turbomachinery, Vol. 138, No. 7, 071005, DOI: 10.1115/1.4032455.

15. Rutledge, J.L., Polanka, M.D., Bogard, D.G., 2016, “The Delta Phi Method of Evaluating Overall Film Cooling Performance,” Journal of Turbomachinery, Vol. 138, No. 7, 071006, DOI: 10.1115/1.4032456.

14. Misak, H.E., Rutledge, J.L., Swenson, E.D., Mall, S., 2016, “Thermal Transport Properties of Dry Spun Carbon Nanotube Sheets,” Journal of Nanomaterials, DOI: 10.1155/2016/9174085.

13. Alban, C.J., Palazotto, A.N., Rutledge, J.L., 2016, “Thermal Considerations With Respect to Sliding Contact at High Speed,” Journal of Thermophysics and Heat Transfer, Vol. 30, No. 1, pp. 54-61, DOI: 10.2514/1.T4548.

12. Shewhart, A.T., Polanka, M.D., Robertson, J.J., Greiner, N.J., Rutledge, J.L., 2015, “Minimization of Heat Load Due to Secondary Reactions in Fuel Rich Environments,” Journal of Engineering for Gas Turbines and Power, Vol. 137, 121504, DOI: 10.1115/1.4030520.

11. Rutledge, J.L., Francis, S.A., Reeder, M.F., Petrosky, J.C., Babis, B.W., Tryon, T.A., 2015, “Improved Method of Investigating Thermal Radiation Effects on Military Aircraft Skins,” Journal of Radiation Effects, Research and Engineering, Vol. 33, No. 1-E, May 2015, pp. 112-124.

10. Rutledge, J.L. and Polanka, M.D., 2015, “Efficiency of an Ideal Brayton Cycle with a Constant-Volume Interturbine Burner,” Journal of Propulsion and Power, Vol. 31, No. 3, pp. 970-975, DOI: 10.2514/1.B35446.

9. Greiner, N.J., Polanka, M.D., Rutledge, J.L., 2015, “Scaling of Film Cooling Performance From Ambient to Engine Temperatures,” Journal of Turbomachinery, Vol. 137, 071007.

8. Rutledge, J.L. and Polanka, M.D., 2015, “Waveforms of Time-Resolved Film Cooling Parameters on a Leading Edge Model,” Journal of Propulsion and Power, Vol. 31, No. 1, January-February, pp.253-264, DOI: 10.2514/1.B35180.

7. Rutledge, J.L. and Polanka, M.D., 2014, “Computational Fluid Dynamics Evaluations of Unconventional Film Cooling Scaling Parameters on a Simulated Turbine Blade Leading Edge,” Journal of Turbomachinery, Vol. 136, 101006.

6. Greiner, N.J., Polanka, M.D., Rutledge, J.L., Robertson, J.J., 2014, “Effect of Variable Properties Within a Boundary Layer With Large Freestream-to-Wall Temperature Differences,” Journal of Engineering for Gas Turbines and Power, Vol. 136, 052604.

5. Rutledge, J.L and Polanka, M.D., 2013, “Achieving a Specific Non-Uniform Heat Flux with an Electrical Heat Flux Plate,” Journal of Heat Transfer, Vol. 135, 084502.

4. Rutledge, J.L. and McCall, J.F., 2013, “Determination of Time Resolved Heat Transfer Coefficient and Adiabatic Effectiveness Waveforms with Unsteady Film,” Journal of Turbomachinery, Vol. 135, 021021.

3. Rutledge, J.L., King, P.I., Rivir, R., 2012, “Influence of Film Cooling Unsteadiness on Turbine Blade Leading Edge Heat Flux,” Journal of Engineering for Gas Turbines and Power, Vol. 134, 071901.

2. Rutledge, J.L., King, P.I., Rivir, R., 2010, “Time Averaged Net Heat Flux Reduction for Unsteady Film Cooling,” Journal of Engineering for Gas Turbines and Power, Vol. 132, 121601.

1. Rutledge, J., Robertson, D., Bogard, D., 2006, “Degradation of Film Cooling Performance on a Turbine Vane Suction Side due to Surface Roughness,” Journal of Turbomachinery, Vol. 128, pp. 547-554.

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