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    Novel mechanism of instability control using tapered spike in hypersonic flow 

    Vashishtha, Ashish; Khurana, Shashank (American Institute of Aeronautics and Astronautics, 2021-08-02)
    A forward facing spiked blunt nose in high-speed flows is associated with pulsating flow behavior of varying amplitudes depending on spike-nose and length, the forebody geometry and flow conditions. A tapered spike has ...
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    On unsteady flow analysis of a round spike blunt nose afterbody in mach 6 flow 

    Vashishtha, Ashish; Khurana, Shashank (IOP Publishing Ltd, 2021)
    An aerospike, in front of a blunt body, has largely been deemed as a key passive control device for effectively reducing the wave drag and aerodynamic heating associated with high-speed flows. In addition, it has been ...
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    Pulsating flow investigation for spiked blunt-nose body in hypersonic flow and its control 

    Vashishtha, Ashish; Khurana, Shashank (American Institute of Aeronautics and Astronautics, 2021-01)
    An aerospike, as a technique for drag reduction and heat transfer in high-speed flows, is associated with instabilities. To understand the pulsating flow behavior in front of forward facing spiked blunt nose, numerical ...
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    CFD-CRN Study of NOx formation in a high-pressure combustor fired with lean premixed CH4 / H2 - air mixtures 

    Vashishtha, Ashish; Yousefian, Sajjad; Goldin, Graham; Frojd, Karin; Jella, Sandeep; Bourque, Gilles; Monaghan, Rory F.D. (The American Society of Mechanical Engineers, 2021-01)
    The main motivation of this study is to investigate detailed NOx and CO formation in high-pressure dump combustor fired with lean premixed methane-air mixture using CFD-CRN hybrid approach. Further, this study is extended ...
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    Study of direct gas injection into stagnation zone of blunt nose at hypersonic flow 

    Harmon, Peter; Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (American Institute of Aeronautics and Astronautics, 2021-07-28)
    Direct gas injection in the shocked or compressed region has importance in many applications from drag control to ignition and pressure gain combustion. This numerical study is focused on direct light gas injection into ...
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    Oblique Detonation Wave Control with O3 and H2O2 Sensitization in Hypersonic Flow 

    Vashishtha, Ashish; Panigrahy, Snehasish; Campi, Dino; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (MDPI journals, 2022-06-04)
    This numerical study investigates the effects of adding a small amount of ignition promoters for controlling the wedge-induced oblique shock wave (OSW) to oblique detonation wave (ODW) transition in a premixed hydrogen–air ...
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    Flow-field and performance study of coaxial supersonic nozzles operating in hypersonic environment 

    Samara, Mohammad Saeed; Vashishtha, Ashish; Watanabe, Yasumasa; Suzuki, Kojiro (Praise Worthy Prize, 2020)
    The integration of multiple propulsion systems in a coaxial configuration is one of the challenges to realize hypersonic passenger transportation. This study is an attempt to understand the performance of two co-axial jets ...
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    Drag control by hydrogen injection in shocked stagnation zone of blunt nose 

    Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal (IOP Publishing, 2021)
    The main motivation of the current study is to propose a high-pressure hydrogen injection as an hybrid active flow control technique in order to manipulate the flow-field in front of a blunt nose during hypersonic flight. ...
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    Particle Acceleration Through Coaxial Co-Flow Nozzles for Cold Spray Applications 

    Kumar Sharma, Amit; Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Bakshi, Srinivasan; Kamaraj, M.; Raghavendra, Ramesh (ITSC 2022 Thermal Spray Conference and Exposition, 2022)
    The present study numerically investigates the effectiveness of co-flowing nozzle for cold spray application. A convergent - divergent axi-symmetric nozzles have been simulated with high-pressure nitrogen flow. The particle ...
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    Numerical investigation of detonation propagation through small orifice holes 

    Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (Sciendo, 2021)
    Seeking to better understand the physical phenomena underlying detonation wave propagation through small holes (especially the phenomenon of detonation re-initiation or its failure), we investigated the propagation of a ...

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    Vashishtha, Ashish (10)
    Callaghan, Dean (5)Nolan, Cathal (5)Deiterding, Ralf (3)Khurana, Shashank (3)Bakshi, Srinivasan (1)Bourque, Gilles (1)Campi, Dino (1)Frojd, Karin (1)Goldin, Graham (1)... View MoreSubjectengCORE - IT Carlow (8)Cold Spray (1)Department of Aerospace, Mechanical and Electronic Engineering (1)Detonation wave (1)drag control (1)emissions, H2-enriched, lean premixed, reactor network, NOx pathways (1)Fuel-sensitization (1)hydrogen (1)hypersonic (1)Hypersonic flow (1)... View MoreDate Issued2021 (7)2022 (2)2020 (1)Has File(s)Yes (10)

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