Reference number : GC-2017-Q1-03438, amendment number : , agreement type : G, recipient legal name : Ng, Hoi Dick (Concordia University)|Ng, Hoi Dick (Université Concordia), recipient country : CA, recipient province : nan, recipient city : Quebec|Québec, recipient postal code : nan, program name english : Discovery Grants Program - Individual, program name french : Programme de subventions à la découverte - individuelles, program purpose english : Under favorable conditions, a detonative combustion can occur in a reactive system causing a significant increase in temperature and pressure of the surrounding medium. A detonation is a supersonic, self-sustained, combustion-driven wave, and an intriguing dynamical event observed in nature. The destructive nature of this phenomenon implies a good knowledge of detonation dynamics is required for the safe management of many industrial settings. A proper, controlled detonative combustion can also provide innovative applications particularly for aerospace systems and miniature mechanical devices which require a powerful driving source. 
 
A five year research program is proposed to advance the understanding of detonation dynamics and its potential technological applications. This will be accomplished through modeling of fundamental detonation problems of direct initiation and limit phenomena in a hierarchical approach, from basic physically-based analytical modeling to high-fidelity, unsteady simulations. An integrated model with multiple mechanisms of losses, boundary layer effects and flow instabilities for the velocity deficits and limits will be developed. Unsteady simulations will be used to study the dynamics of near-limit detonations; to numerically determine the initiation energy; and analyze the cellular evolution of diverging detonations. Real gas effects and complex chemistry including different equations of state and non-equilibrium effects will be assessed to improve the current model description of detonations. In addition to the measurement of explosion hazards for blended alternative fuel mixtures and dispersed reactive media, experiments will be conducted to explore how a detonation is affected by sudden changes in chemical and thermodynamic states of the reacting flow, revealing underlying dynamical processes within its structure. Finally, two distinct applications of the detonation phenomenon will be explored. The first application deals with the oblique detonation wave (ODW) concept for supersonic propulsion systems. The aim is to understand the ODW formation structure and instability through realistic flow simulations for developing workable ODW engines. The second topic is on the development of a combustion-type, controlled release, needle-free, liquid jet injection technology for drug delivery. The idea is to design a needle-free injector that will harness the pressure generation from different modes of combustion process. 
 
The ultimate goal of this research is to advance the fundamental understanding of how a detonation is formed, the effects influencing its propagation, and implementing its use in a controlled manner for engineering applications. This research program will have a broad impact in energy, defense, aerospace and biomedical industries and produce a group of HQPs with expertise in explosion safety and detonation physics., program purpose french : Under favorable conditions, a detonative combustion can occur in a reactive system causing a significant increase in temperature and pressure of the surrounding medium. A detonation is a supersonic, self-sustained, combustion-driven wave, and an intriguing dynamical event observed in nature. The destructive nature of this phenomenon implies a good knowledge of detonation dynamics is required for the safe management of many industrial settings. A proper, controlled detonative combustion can also provide innovative applications particularly for aerospace systems and miniature mechanical devices which require a powerful driving source. 
 
A five year research program is proposed to advance the understanding of detonation dynamics and its potential technological applications. This will be accomplished through modeling of fundamental detonation problems of direct initiation and limit phenomena in a hierarchical approach, from basic physically-based analytical modeling to high-fidelity, unsteady simulations. An integrated model with multiple mechanisms of losses, boundary layer effects and flow instabilities for the velocity deficits and limits will be developed. Unsteady simulations will be used to study the dynamics of near-limit detonations; to numerically determine the initiation energy; and analyze the cellular evolution of diverging detonations. Real gas effects and complex chemistry including different equations of state and non-equilibrium effects will be assessed to improve the current model description of detonations. In addition to the measurement of explosion hazards for blended alternative fuel mixtures and dispersed reactive media, experiments will be conducted to explore how a detonation is affected by sudden changes in chemical and thermodynamic states of the reacting flow, revealing underlying dynamical processes within its structure. Finally, two distinct applications of the detonation phenomenon will be explored. The first application deals with the oblique detonation wave (ODW) concept for supersonic propulsion systems. The aim is to understand the ODW formation structure and instability through realistic flow simulations for developing workable ODW engines. The second topic is on the development of a combustion-type, controlled release, needle-free, liquid jet injection technology for drug delivery. The idea is to design a needle-free injector that will harness the pressure generation from different modes of combustion process. 
 
The ultimate goal of this research is to advance the fundamental understanding of how a detonation is formed, the effects influencing its propagation, and implementing its use in a controlled manner for engineering applications. This research program will have a broad impact in energy, defense, aerospace and biomedical industries and produce a group of HQPs with expertise in explosion safety and detonation physics., agreement title english : Detonation Dynamics in Chemically Reactive Systems: Modelling, Experiments and Technological Applications, agreement title french : Detonation Dynamics in Chemically Reactive Systems: Modelling, Experiments and Technological Applications, agreement number : RGPIN, agreement value : 275000.0, agreement start date : 2017-05-10, agreement end date : nan, description english : nan, description french : nan, expected results english : nan, expected results french : nan, additional information english : Grant or Award spanning more than one fiscal year. (2017-2018 to 2022-2023), additional information french : Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier. (2017-2018 à 2022-2023), owner organization : nserc-crsng, owner organization title : Natural Sciences and Engineering Research Council of Canada | Conseil de recherches en sciences naturelles et en génie du Canada