Dr.-Ing. Joshua Gray

Research Interests

My current research deals with the effect of nanosecond repetitively-pulsed plasma discharges on flame propagation and the deflagration-to-detonation transition (DDT). My interests also include other mechanisms for the onset of DDT, such as shock-obstacle interaction and shock focusing as well as related topics, such as the acceleration of propagating turbulent flames. Previous work has spanned from the investigation of turbulent, premixed, swirl-stabilized flames to pulse detonation combustor applications.

Selected Publications

Enhancement of the transition to detonation of a turbulent hydrogen-air flame by nanosecond repetitively pulsed pla...
J.A.T. Gray, D.A. Lacoste
Combustion and Flame (accepted for publication), (2018)
Detonation initiation in pipes with a single obstacle for mixtures of hydrogen and oxygen-enriched air
S. Bengoechea, J.A.T. Gray, J. Reiss, J.P. Moeck, C.O. Paschereit, J. Sesterhenn
Combustion and Flame, Volume 198, 290-304, (2018)
A compact shock-focusing geometry for detonation initiation: Experiments and adjoint-based variational data assimil...
J.A.T. Gray, M. Lemke, J. Reiss, C.O. Paschereit, J. Sesterhenn, J.P. Moeck‏
Combustion and Flame, Volume 183, 144-156, (2017)
Thermodynamic Evaluation of Pulse Detonation Combustion for Gas Turbine Power Cycles‏
J.A.T. Gray, J. Vinkeloe, J. Moeck, C.O. Paschereit, P. Stathopoulos, P. Berndt
ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, (2016)
Non-reacting investigations of a pseudo-orifice for the purpose of enhanced deflagration to detonation transition
J.A.T. Gray, J.P. Moeck und C.O. Paschereit
In Roy, G.D. and Frolov, S.M. ed. International Conference on Pulsating and Cont..., (2014)
An Experimental Study of Different Obstacle Types for Flame Acceleration and DDT
J. A. T. Gray, C. O. Paschereit, J. P. Moeck
In King, R. ed. Active Flow and Combustion Control 2014, S. 265279. Springer, (2015)
Numerical Study on the Reduction of NOx Emissions From Pulse Detonation Combustion
N. Djordjevic, N. Hanraths, J. A. T. Gray, P. Berndt, J. P. Moeck
J. Eng. Gas Turbines Power 140(4), 041504 , (2018)

Education

Doctorate (defended), Engineering Science, Technische Universität Berlin, 2017
M.Sc., Engineering Science, Technische Universität Berlin, 2011
B.S., Aerospace Engineering, Georgia Institute of Technology, Atlanta, United States, 2007

Professional Profile

2017-Present: Postdoctoral Fellow, KAUST, Thuwal, Saudi Arabia
2011-2017: Doctoral Researcher, Technische Universität Berlin, Berlin, Germany
2009-2011: Student Research Assistant, Technische Universität Berlin, Berlin, Germany
2002-2007: Undergraduate Research Assistant, Georgia Institute of Technology, Atlanta, United States

KAUST Affiliations

Clean Combustion Research Center (CCRC)
Mechanical Engineering Division

Research Interests Keywords

Plasma-assisted combustion Detonation DDT