WARREN F.
PHILLIPS
Department of Mechanical & Aerospace Engineering
Academic Rank: Professor
Education: B.S.M.E,
M.S.M.E.,
Ph.D.,
Number
of Years at
Current Research Interests:
Dr. Phillips’ current research interests encompass thermo-fluid science and aerodynamics. Over the past three years Dr. Phillips has been working primarily on the development of a new turbulence model, which shows great promise for improving the predictive capability of computational fluid dynamics, particularly at low Reynolds numbers. The foundation for this turbulence model is a new eddy-viscosity model based on a turbulent-energy length scale that is independent of molecular viscosity. The development of this model comes from a more rigorous application of Boussinesq’s analogy between molecular and turbulent transport and from a more rigorous development of the turbulent kinetic energy transport equation. The analysis shows that turbulent transport should not be modeled as pure gradient diffusion, as it is in the current generation of Boussinesq-based turbulence models. To date only isothermal flows have been studied, but results to be published in 2010 show great promise. Over the next few years, Dr. Phillips plans to continue the development of this new turbulence model by refining closure coefficients through comparisons with experimental data and by extending the model to high-temperature non-isothermal flows with high heat-transfer rates.
Publications:
Dr. Phillips has published more than 60 technical journal papers, and has more than 50 technical papers presented at national and international conferences.
Books
Phillips, W. F., Mechanics of Flight, 2nd Edition, Wiley,
Phillips, W. F., “Aerodynamics of Wings,”
Chapter 10, Eshbach's Handbook of
Engineering Fundamentals, 5th Edition, Edited by Myer Kutz, Wiley, Hoboken,
NJ, ISBN 978-0-470-08578-3, (Jan. 2009).
Phillips, W. F., Mechanics of Flight, Wiley,
Recent Journal Publications
Phillips, W. F., Hunsaker, D. F., and Spall, R. E., “Smooth-Wall Boundary Conditions for Dissipation-Based Turbulence Models,” AIAA Journal, submitted for publication (Aug. 2009).
Phillips, W. F., “Limits of Continuum Aerodynamics,” Journal of Aircraft, accepted for publication (Aug. 2009).
Phillips, W. F., and Niewoehner, R. J., “Characteristic Length and Dynamic Time Scale Associated with Aircraft Pitching Motion,” Journal of Aircraft, Vol. 46, No. 2, pp. 572-582 (April 2009).
Phillips, W. F., Alley, N. R., and Niewoehner, R. J., “Effects of Nonlinearities on Subsonic Aerodynamic Center,” Journal of Aircraft, Vol. 45, No. 4, pp. 1244-1255 (Aug. 2008).
Phillips, W. F., Hunsaker, D. F., and Niewoehner, R. J., “Estimating the Subsonic Aerodynamic Center and Moment Components for Swept Wings,” Journal of Aircraft, Vol. 45, No. 3, pp. 1033-1043 (June 2008).
Phillips, W. F., and Alley, N. R., “Predicting Maximum Lift Coefficient for Twisted Wings Using Lifting-Line Theory,” Journal of Aircraft, Vol. 44, No. 3, pp. 898-910 (June 2007).
Alley, N. R., Phillips, W. F., and Spall, R. E., “Predicting Maximum Lift Coefficient for Twisted Wings Using Computational Fluid Dynamics,” Journal of Aircraft, Vol. 44, No. 3, pp. 911-917 (June 2007).
Phillips, W. F., Hansen, A. B., and Nelson, W. M., “Effects of Tail Dihedral on Static Stability,” Journal of Aircraft, Vol. 43, No. 6, pp. 1829-1837 (Dec. 2006).
Phillips, W. F., and Niewoehner, R. J., “Effect of Propeller Torque on Minimum-Control Airspeed,” Journal of Aircraft, Vol. 43, No. 5, pp. 1393-1398 (Oct. 2006).
Phillips, W. F., Fugal, S. R., and Spall, R. E., “Minimizing Induced Drag with Wing Twist, Computational-Fluid-Dynamics Validation,” Journal of Aircraft, Vol. 43, No. 2, pp. 437-444 (April 2006).
Phillips, W. F., Alley, N. R., and Goodrich, W. D., “Lifting-Line Analysis of Roll Control and Variable Twist,” Journal of Aircraft, Vol. 41, No. 5, pp. 1169-1176 (Oct. 2004).
Phillips, W. F., “Lifting-Line Analysis
for Twisted Wings and Washout-Optimized Wings,” Journal of Aircraft, Vol. 41, No. 1, pp. 128-136 (Feb. 2004).
Phillips, W. F., Anderson, E. A., and Kelly, Q. J., “Predicting the Contribution of Running Propellers to Aircraft Stability Derivatives,” Journal of Aircraft, Vol. 40, No. 6, pp. 1107-1114 (Dec. 2003).
Phillips, W. F., “Estimating the Low-Speed Sidewash Gradient on a Vertical Stabilizer,” Journal of Aircraft, Vol. 39, No. 6, pp. 1088-1090 (Nov. 2002).
Phillips, W. F., and Anderson, E. A., “An Analytical Approximation for the Mechanics of Airplane Spin,” Journal of Aircraft, Vol. 39, No. 6, pp. 1084-1088 (Nov. 2002).
Phillips, W. F., and Santana, B. W., “Aircraft Small-Disturbance Theory with Longitudinal-Lateral Coupling,” Journal of Aircraft, Vol. 39, No. 6, pp. 973-980 (Nov. 2002).
Phillips, W. F., Anderson, E. A., Jenkins, J. C., and Sunouchi, S., “Estimating the Low-Speed Downwash Angle on an Aft Tail,” Journal of Aircraft, Vol. 39, No. 4, pp. 600-608 (Aug. 2002).
Phillips, W. F., “An Analytical Solution for Wing Dihedral Effect,” Journal of Aircraft, Vol. 39, No. 3, pp. 514-516 (June 2002).
Phillips, W. F., “Propeller Momentum Theory with Slipstream Rotation,” Journal of Aircraft, Vol. 39, No. 1, pp. 184-187 (Jan. 2002).
Phillips, W. F., Hailey, C. E., and Gebert, G. A., “A Review of Attitude Representations Used for Aircraft Kinematics,” Journal of Aircraft, Vol. 38, No. 4, pp. 718-737 (July 2001). Also see Errata, Journal of Aircraft, Vol. 40, No. 1, pp. 223 (Jan. 2003).
Phillips, W. F., and Snyder, D. O., “Modern Adaptation of Prandtl’s Classic Lifting-Line Theory,” Journal of Aircraft, Vol. 37, No. 4, pp. 662-670 (July 2000).
Phillips, W. F., “Improved Closed-Form Approximation for Dutch Roll,” Journal of Aircraft, Vol. 37, No. 3, pp. 484-490 (May 2000).
Phillips, W. F., “Phugoid Approximation for Conventional Airplanes,” Journal of Aircraft, Vol. 37, No. 1, pp. 30-36 (Jan. 2000).
Recent Meeting Presentations
Phillips, W. F., Hunsaker, D. F., and Spall, R. E., “Smooth-Wall Boundary Conditions for Dissipation-Based Turbulence Models,” AIAA-2010-1103, Presented at the 48th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2010).
Phillips, W. F., Hunsaker, D. F., Alley, N. R., and Niewoehner, R. J., “Pitch Dynamics of Unmanned Aerial Vehicles,” AIAA-2009-0062, Presented at the 47th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2009).
Phillips, W. F., and Niewoehner, R. J., “Characteristic Length and Dynamic Time Scale Associated with Aircraft Pitching Motion,” AIAA-2009-0304, Presented at the 47th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2009).
Phillips, W. F., Alley, N. R., and
Niewoehner, R. J., “Effects of Nonlinearities on Subsonic Aerodynamic Center,” AIAA-2008-0204,
Presented at the 46th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2008).
Phillips, W. F., Hunsaker, D. F., and
Niewoehner, R. J., “Estimating the Subsonic Aerodynamic Center and Moment
Components for Swept Wings,” AIAA-2008-0192, Presented at the 46th AIAA
Aerospace Sciences Meeting and Exhibit (Jan. 2008).
Phillips, W. F., and Alley, N. R., “Predicting
Maximum Lift Coefficient for Twisted Wings Using Lifting-Line Theory,” AIAA-2007-1267,
Presented at the 45th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2007).
Alley, N. R., Phillips, W. F., and Spall,
R. E., “Predicting Maximum Lift Coefficient for Twisted Wings Using
Computational Fluid Dynamics,” AIAA-2007-0898, Presented at the 45th
AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2007).
Alley, N. R., Phillips, W. F., and Spall,
R. E., “Minimizing Induced Drag with Blowing Variation Along the Span of a
Circulation-Controlled Wing,” AIAA-2007-0711, Presented at the 45th AIAA
Aerospace Sciences Meeting and Exhibit (Jan. 2007).
Phillips, W. F., Fugal, S. R., and Spall,
R. E., “Minimizing Induced Drag with Geometric and Aerodynamic Twist, CFD
Validation,” AIAA-2005-1034, Presented at the 43rd AIAA Aerospace
Sciences Meeting and Exhibit (Jan. 2005).
Spall, R. E., Phillips, W. F., and Alley,
N. R., “An Assessment of Five Turbulence Models in Predicting Turbulent
Separation,” ASME-HT-FED2004-56813, Presented
at the ASME Heat Transfer/Fluids Engineering Summer Conference (July 2004).
Phillips, W. F., Alley, N. R., and Goodrich, W. D., “Lifting-Line Analysis of Roll Control and Variable Twist,” AIAA-2003-4061, Presented at the 21st AIAA Applied Aerodynamics Conference (June 2003).
Phillips, W. F., “Lifting-Line Analysis for the Effects of Washout on Performance and Stability,” AIAA-2003-393, Presented at the 41st AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2003).
Phillips, W. F., Anderson, E. A., Jenkins, J. C., and Sunouchi, S., “Estimating the Low-Speed Downwash Angle on an Aft Tail,” AIAA-2002-0830, Presented at the 40th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2002).
Phillips, W. F., and Anderson, E. A., “Predicting the Contribution of Running Propellers to Aircraft Stability Derivatives,” AIAA-2002-0390, Presented at the 40th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2002).
Phillips, W. F., Hailey, C. E., and Gebert, G. A., “The Effects of Orthogonality Error in Aircraft Flight Simulation,” AIAA-2001-0108, Presented at the 39th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2001).
Phillips, W. F., Hailey, C. E., and Gebert, G. A., “A Review of Attitude Kinematics for Aircraft Flight Simulation,” AIAA-2000-4302, Presented at the AIAA Simulation and Modeling Conference (Aug. 2000).
Phillips, W. F., and Snyder, D. O., “Application of Lifting-Line Theory to Systems of Lifting Surfaces,” AIAA-2000-0653, Presented at the 38th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2000).
Phillips, W. F., “An Accurate Closed-Form Approximation for Dutch Roll,” AIAA-2000-0449, Presented at the 38th AIAA Aerospace Sciences Meeting and Exhibit (Jan. 2000).
Patents:
Phillips, W. F., “Apparatus and method for
reducing induced drag on aircraft and other vehicles,” United States Patent Number 6,970,773, (Filed
Phillips, W. F., “Device and method for
control of flexible link robot manipulators,” United States Patent Number 5,049,797, (Filed July 2, 1990; Issued September 17, 1991).
Honors and Awards:
National
Professional Societies
AIAA Certificate of Merit for the Outstanding Atmospheric Flight Mechanics Paper, 2003.
AIAA
AIAA Certificate of Merit for the Outstanding Paper, 2000 Modeling & Simulation Technologies Conference.
AIAA
ASEE Outstanding Engineering Educator,
Intermountain Region, 1979.
Robins Award 2001,
Robins Award 2000,
Advisor of the Year 1999, Department of Mechanical and Aerospace Engineering.
Teacher of the Year 1998, Department of Mechanical and Aerospace Engineering.
Advisor of the Year 1997, Department of Mechanical and Aerospace Engineering.
Outstanding Research Award,
Outstanding Teacher Award,
Joseph Bursley Award for the Outstanding Mechanical
Engineering Student, Class of 1966.
Scientific and Professional
Societies:
Senior Member, American Institute of Aeronautics
and Astronautics