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Conference Papers

A. Yildirim, Gray, J. S., Mader, C. A., and Martins, J. R. R. A., “Aeropropulsive Design Optimization of a Boundary Layer Ingestion System”, in AIAA AVIATION Forum, Dallas, TX, 2019.

Yildirim2019a-Aeropropulsive Design Optimization of a Boundary Layer Ingestion System.pdf (28.31 MB)

J. S. Gray, Kenway, G. K. W., Mader, C. A., and Martins, J. R. R. A., “Aeropropulsive Design Optimization of a Turboelectric Boundary Layer Ingestion Propulsion System”, in Proceedings of the AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2018.

starc_abl_2018.pdf (14.26 MB)

J. S. Gray, Mader, C. A., Kenway, G. K. W., and Martins, J. R. R. A., “Approach to Modeling Boundary Layer Ingestion using a Fully Coupled Propulsion-RANS Model”, in 55th AIAA Aerospace Sciences Meeting (SciTech), 2017.

J. S. Gray, Hearn, T. A., Moore, K. T., Hwang, J. T., Martins, J. R. R. A., and Ning, A., “Automatic Evaluation of Multidisciplinary Derivatives Using a Graph-Based Problem Formulation in OpenMDAO”, in Proceedings of the 15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Atlanta, GA, 2014.

Gray-MAO-2014.pdf (4.08 MB)

J. P. Jasa, Chauhan, S. S., Gray, J. S., and Martins, J. R. R. A., “How Certain Physical Considerations Impact Aerostructural Wing Optimization”, in AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2019.

jasa_aviation_2019.pdf (402.31 KB)

S. Roy, Moore, K. T., Hwang, J. T., Gray, J. S., Crossley, W. A., and Martins, J. R. R. A., “A Mixed Integer Efficient Global Optimization Algorithm for the Simultaneous Aircraft Allocation-Mission-Design Problem”, in Proceeding of the 58th AIAA Structures, Structural Dynamics, and Materials Conference, 2017.

J. Y. Kao, Hwang, J. T., Martins, J. R. R. A., Gray, J. S., and Moore, K. T., “A modular adjoint approach to aircraft mission analysis and optimization”, in 56th AIAA SDM Conference, Kissimmee, FL, 2015.

Kao2015a.pdf (611.01 KB)

J. P. Jasa, Gray, J. S., Seidel, J. A., Mader, C. A., and Martins, J. R. R. A., “Multipoint Optimization of a Variable Cycle Engine Using Gradient-based Optimization”, in 57th AIAA Aerospace Sciences Meeting, AIAA SciTech Forum, San Diego, CA, 2019.

jasa_scitech_2019_submitted.pdf (1012.9 KB)

S. Roy, Crossley, W. A., Moore, K. T., Gray, J. S., and Martins, J. R. R. A., “Next generation aircraft design considering airline operations and economics”, in AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2018.

E. Hendricks, Falck, R. D., and Gray, J. S., “Simultaneous Propulsion System and Trajectory Optimization”, in 18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2017.

J. S. Gray, Chin, J. C., Hearn, T. A., Hendricks, E., Lavelle, T. M., and Martins, J. R. R. A., “Thermodynamics for Gas Turbine Cycles with Analytic Derivatives in OpenMDAO”, in 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016.

gray_pycycle_thermodynamics.pdf (688.53 KB)

R. D. Falck, Chin, J. C., Schnulo, S. L., Burt, J. M., and Gray, J. S., “Trajectory Optimization of Electric Aircraft Subject to Subsystem Thermal Constraints”, in 18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2017.

Journal Articles

J. S. Gray, Chin, J. C., Hearn, T. A., Hendricks, E., Lavelle, T. M., and Martins, J. R. R. A., “Chemical-Equilibrium Analysis with Adjoint Derivatives for Propulsion Cycle Analysis”, Journal of Propulsion and Power, vol. Vol.33, pp. 1041-1052, 2017.

J. S. Gray and Martins, J. R. R. A., “Coupled Aeropropulsive Design Optimization of a Boundary Layer Ingestion Propulsor”, The Aeronautical Journal, vol. 123, no. 1259, pp. 121–137, 2019.

Gray2019-Coupled Aeropropulsive Design Optimization of a Boundary Layer.pdf (2.38 MB)

J. S. Gray, Mader, C. A., Kenway, G. K. W., and Martins, J. R. R. A., “Modeling Boundary Layer Ingestion Using a Coupled Aeropropulsive Analysis”, Journal of Aircraft, vol. Vol.55, pp. 1191-1199, 2018.

Gray2018-Modeling boundary layer ingestion using a coupled aeropropulsive analysis-Preprint.pdf (2.07 MB)

J. S. Gray, Hwang, J. T., Martins, J. R. R. A., Moore, K. T., and Naylor, B. A., “OpenMDAO: An open-source framework for multidisciplinary design, analysis, and optimization”, Structural and Multidisciplinary Optimization, vol. 59, no. 4, p. 1075--1104, 2019.

OpenMDAO_preprint.pdf (2.75 MB)

PhD Thesis

J. S. Gray, “Design Optimization of a Boundary Layer Ingestion Propulsor Using a Coupled Aeropropulsive Model”, University of Michigan, 2018.

gray_phd_thesis_2018.pdf (23.42 MB)