Browsing Aerospace, Mechanical & Electronic Engineering ITC by Subject "engCORE - SETU Carlow"

Now showing items 1-8 of 8

    • A concept of aerospike nozzle for cold spray additive manufacturing: towards a potential solution for preventing the issue of clogging 

      Raoelison, Rija Nirina; Msolli, Sabeur; Deng, Sihao; Vashishtha, Ashish; Callaghan, Dean; Zaim-Mounajed, Wassim; Zhang, Teng; Padayodi, Essolé; Sagot, Jean-Claude; Raghavendra, Ramesh (ASM International, 2023-05-22)
      The clogging, a frequent gas passage deformation phenomenon because of powder accumulation on inner nozzle wall, is a major issue in long duration Cold Spray (CS) operations and a major challenge for Cold spray technology ...

    • Detached eddy simulation of unsteady flow over a frontal cavity 

      Salunke, Samruddhi; Shinde, Suryapratap; Singh, Ishika; Sahoo, Devabrata; Vashishtha, Ashish (American Institute of Aeronautics and Astronautics, 2023)
      Frontal cavity consists of complex unsteadiness which causes bow shock instabilities when the body is moving at supersonic or hypersonic speed through a fluid. These complex unsteady flow fields are an important practical ...

    • Effects of freestream disturbances in front of spiked blunt nose at hypersonic flow 

      Vashishtha, Ashish; Khurana, Shashank; Callaghan, Dean; Nolan, Cathal (Council of European Aerospace Societies, 2021)
      The effects of high frequency slow and fast acoustic wave freestream disturbances are modelled in front of pulsating bow shock formed at spiked blunt nose in hypersonic flow. These disturbances are introduced as time-dependent ...

    • Investigation of a modified circular nozzle for cold spray applications 

      Sharma, Amit Kumar; Vashishtha, Ashish; Callaghan, Dean; Bakshi, Srinivasan Rao; Kamaraj, M.; Raghavendra, Ramesh (ASM International, 2023-05-22)
      The current work numerically evaluates the efficacy of a coflowing nozzle for cold spray applications with the aim to mitigate nozzle clogging by reducing the length of its divergent section. The high-pressure nitrogen ...

    • Mach number dependence of flow instability around a spiked body 

      Vashishtha, Ashish; Khurana, Shashank (AIP Publishing, 2023-05-05)
      A forward-facing aerospike have been identified as a passive flow control device for enhancing the aerodynamic efficiency and reducing the heat transfer in high-speed flows. In addition, it has been reported that the ...

    • Numerical study of an aerospike nozzle in retropropulsion 

      Vashishtha, Ashish; Khurana, Shashank; Callaghan, Dean; Nolan, Cathal (Council of European Aerospace Societies, 2021)
      The primary motivation of this numerical study is to explore the feasibility of drag enhancement using aerospike nozzle for retropropulsion in hypersonic flow. An external expansion contoured aerospike nozzle with design ...

    • Numerical study of oblique detonation wave control for fuel blends 

      Kore, Rushikesh; Vashishtha, Ashish (2023)
      The current study is motivated to develop control strategies for oblique detonation wave formation on a finite length wedge in a premixed methane-air mixture. The effectiveness of hydrogen blends (0 - 100%) to methaneair ...

    • Unsteady DSMC Simulation of blunt nose with spike at hypersonic rarefield flows 

      Ravuri, Nishita; Scully, Stephen; Vashishtha, Ashish (2023-03-29)
      To design an efficient ram-air intake for an air-breathing propulsion system for VLEO (Very-Low) / SLEO (Super Low) Earth Orbit satellites requires consideration of the unsteady effects in the hypersonic low-density or ...