Dr Ashish Vashishtha
PhD MTech BTech MRAeS
Dr Ashish Vashishtha is PI, supervisor and Lecturer at Department of Aerospace and Mechanical Engineering, SETU Carlow. He completed his PhD in 2016 Advanced Energy at The University of Tokyo, Japan with research in experimental and numerical unsteady hypersonic flows. With his postdoctoral experiences at University of Galway, Ireland & Indian Institute of Science Bangalore, India, he developed deep interest in green energy technologies, as well as hypersonic propulsion and detonation combustion. Prior to his PhD, he had 5 years of industrial experience in spray and combustion modelling in IC Engines. He completed his Bachelor and master’s degrees in Aerospace Engineering at Indian Institute of Technology Kanpur, India with experience in supersonic flows and high-speed jets.
- Research Interests
- Research Supervision
- Engagement and Collaboration
Dr Vashishtha has wide range of experience in industry and academia related to experimental and numerical fluid-thermodynamics applications, reactive flows. Currently, he is actively pursuing applied aspects of fluid and thermodynamics related to automotive, aerospace and energy, manufacturing industries. His research interest can be summarized as follows:
- High-Speed Flows: Flow Controls, Shock Waves, Unsteady Flow Analysis.
- Reactive Flows: Combustion, Emission Modelling, Fuel Flexibility, Alternative Fuels Technologies, Explosions and Gaseous Detonation modelling.
- Modelling and simulation for fluid and thermal energy systems.
- Instrumentation, 2-D and 3-D Unsteady Optical Flow Measurement Techniques, Data Driven Analysis Methods.
Sustainable Energy Authority of Ireland, (SEAI) RD&D Funding Programme 2021
(Funding: € 900k for 3 years with Consortium of UL, NUIG, SETU Carlow and TUD)
Title: SPOTBlade - Strategies for erosion and fouling Protection of Offshore Turbine Blades
Role: Team Member, Leading Work-package related to Modelling & Prediction at SETU Carlow
South East Technological University Carlow Campus, Capital Call 2022 (Funding: €35000)
Title: Laser Based Flow Visualization Method.
Role: Lead Applicant
Irish Research Council GOI-PG Funding 2021 (Funding: €55000 for 2 years)
Title: Design & Applications of Air-breathing Propulsion System for Very Low and Super Low Earth Orbit Satellites.
Role: Supervisor (Master's Student)
Irish Research Council GOI-PG Funding 2022 (Funding: €55000 for 2 years)
Title: Green Propellant for future small satellite launch vehicle.
Role: Supervisor (Master's Student)
SETU Carlow President Research Fellowship for PhD 2022 (Approved Funding: €82750 for 3 years)
Title: Characterizing the Supersonic Micro-Nozzle Designs for Cold-Spray Applications
Role: Supervisor (PhD.)
South-East Research Development Fund 2021 (Funding: €102000 for 4 years)
Title: Modelling and Development of Cold Spray for Additive Manufacturing (CSAM)
International Collaboration among SETU Carlow, SETU Waterford and IIT Madras, India.
Role: Supervisor (PhD)
Science Foundation Ireland (SFI) Defence Organisation Innovation Challenge, 2021 Funding: €263,301
Title: (AltFuel4DF) @altfuel4 Portable and Scalable Waste to Synthetic Biofuel Technology Demonstrator to Decarbonise Defence Force Transport
Role: Lead Applicant, Partners: University of Galway, Barna Recycling, Caribou Biofuels
Irish Research Council Ulysses Mobility Grant 2021 (Funding: €5000 for 1 years)
Title: Development of cold spray using micronozzles for milli to micro-scale metal deposition Collaboration among SETU Carlow, SETU Waterford and University of Technology at Belfort- Montbéliard, Belfort (UTBM), France.
Role: Lead Applicant in Ireland
Doctoral: Ashish Vashishtha, “Bow-Shock Instability and its Control in front of Concave shaped Blunt Nose at Hypersonic Mach No. 7", under supervision of Prof. Kojiro Suzuki, Department of Advanced Energy, The University of Tokyo, Kashiwa, JAPAN (September, 2016), U-Tokyo Repository, Thesis Number: 12601 A No. 33230 DOI:doi.org/10.15083/00075323
Masters: Ashish Vashishtha, “Experimental Investigation of Drag Reduction using Breathing Blunt Nose in Supersonic Flow Regime”, under supervision of Prof. E. Rathakrishnan, Department of Aerospace Engineering, Indian Institute of Technology, Kanpur, INDIA (May, 2008). DOI: 10.13140/RG.2.2.10360.26882
Peer Reviewed Journal Articles
Vashishtha A., Panigrahy S., Campi D., Callaghan D., Nolan C. and Deiterding R. “Oblique Detonation Wave Transition with Hydrogen Peroxide and Ozone Sensitization in Hypersonic Flow", Energies 2022, 15, 4140. DOI: 10.3390/en15114140
Vashishtha A., Callaghan D. Nolan C. Deiterding R., “Numerical Investigation of Detonation Wave Propagation through Small Orifice Holes'', Transactions on Aerospace Research, 3(264), pp.17-33, 2021. DOI: 10.2478/tar-2021-0014
Samara, M., Vashishtha, A., Watanabe, Y., Suzuki, K.,”Flow-Field and Performance Study of Coaxial Supersonic Nozzles Operating in Hypersonic Environment", International Review of Aerospace Engineering (IREASE), Vol. 13, No. 1, pp. 25-39 (2020). DOI: 10.15866/irease.v13i1.18282
Vashishtha A., “Book Review: Applied Gas Dynamics", AIAA Journal, Vol. 58, No. 3, pp. 1421-1422 (2020/03) DOI: 10.2514/1.J059266
Vashishtha A., Watanabe Y., Suzuki K., “Bow-Shock Instability and its Control in front of Hemispherical Concave Shell at Hypersonic Mach Number 7", Transactions of The Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, Vol. 14, No. 30, pp 121-128 (2016). DOI: 10.2322/tastj.14.Pe_121
Vashishtha A., Watanabe Y. Suzuki K., “Study of Shock Shape in front of Concave, Convex and Flat Arc in Hypersonic Flow", JAXA Special Publications Vol. 14 No.10 (JAXA-SP-14-010), pp. 127-132 (2015). Link
Vashishtha A., Rathakrishnan E., “Breathing Blunt Nose Concept for Drag Reduction in Supersonic Flow", Journal of Aerospace Engineering IMECH E Part G, Vol. 223, No.1 pp.31-38 (2009). DOI:10.1243/09544100JAERO369
Sharma H., Vashishtha A., Rathakrishnan E., “Experimental Study of Overexpanded Co-flowing Jets", The Aeronautical Journal, Royal Aeronautical Society, Vol. 112, No. 1135 pp.537 - 546 (2008). DOI:10.1017/S0001924000002499
Sharma H., Vashishtha A., Rathakrishnan E., “Twin Vortex Flow Physics", Journal of Aerospace Engineering IMECH E Part G, Vol. 222, No.6, pp. 783-788 (2008) DOI: 10.1243/09544100JAERO322
Conference Proceedings and Papers
Deshmukh J., Sahoo D., Kumar D., and Vashishtha A., “Unsteady simulation of frontal cavity in supersonic flows”, Book Chapter, Aerospace and Associated Technology, Proceedings of the Joint Conference of ICTACEM 2021, APCATS 2021, AJSAE 2021 and AeSI 2021, Taylor & Francis, Ch 4, pp. 19-24, DOI: 10.1201/9781003324539-4
Sharma A.K., Vashishtha A., Callaghan D., Nolan C., Bakshi S., Kamaraj M., and Ramesh R., “Particle acceleration through coaxial co-ow nozzles for Cold Spray Applications", in Proceedings of ITSC 2022, Thermal Spray Conference and Exposition Paper No: itsc2022p0676, pp. 676-682; DOI: 10.31399/asm.cp.itsc2022p0676
Vashishtha A. and Khurana S., "Mach number Dependence of Flow Instability around a Spiked Body'', presented at 2nd International Conference on Recent Advances in Fluid and Thermal Sciences (iCraft 2020), March 19-21, 2021, in Print for AIP Conference Series. ArXiV Link
Samuel Y.A., Confrey T., Vashishtha A., Callaghan D., Kent N. and, Nolan C., "An Assessment of Radiation Models Utilized in CFD for Thermal and Fluid Analysis in Interior Building Spaces with Large Glazing'', presented at 2nd International Conference on Recent Advances in Fluid and Thermal Sciences (iCraft 2020), March 19-21, 2021, in Print for AIP Conference Series.
Harmon P., Vashishtha A., Callaghan D., Nolan C. and Deiterding R., "Study of Direct gas Injection into Stagnation Zone of Blunt nose at Hypersonic Flow'', AIAA-2021-3529, AIAA Propulsion & Energy, Aug 9-11, 2021, Colorado, USA DOI:10.2514/6.2021-3529
Vashishtha A. and Khurana S., "Novel Mechanism of Instability Control using Tapered Spike in Hypersonic Flow'', AIAA-2021-2543, AIAA Aviation, August 02-06, 2021, Washington D.C., USA DOI:10.2514/6.2021-2543
Vashishtha A., and Khurana S., “Pulsating Flow Investigation for Spiked Blunt-Nose Body in Hypersonic Flow and its Control ", presented at AIAA SciTech 2021, AIAA-2021-0839 (2021).DOI:10.2514/6.2021-0839
Vashishtha A., Yousefian S., Goldin G., Frojd K., Jella S., Bourque G., Monaghan RDF, “CFD-CRN Study of NOx formation in a High-Pressure Combustor fired with Lean Premixed CH4 / H2 -Air Mixtures", GT2020-14819 in Proceedings of ASME Turbo Expo 2020 Virtual Conference (2021) DOI:10.1115/GT2020-14819.
Vashishtha A., Callaghan D., and Nolan C., “Drag Control by Hydrogen Injection in Shocked Stagnation Zone of Blunt Nose”, in IOP Conference Series: Materials Science and Engineering. 1024 012110. DOI: 10.1088/1757-899X/1024/1/012110
Vashishtha A. and Khurana S., “On Unsteady Flow Analysis of a Round Spike Blunt-Nose Afterbody in Mach 6 Flow", in in IOP Conference Series: Materials Science and Engineering 1024 012017 (2021). DOI:10.1088/1757-899X/1024/1/012017
Chaubdar P., AB Harichandan, Vashishtha A., Jagadeesh G., “Experimental and Numerical Studies of Shock-Interaction using Toroidal Ballute in Hypersonic Shock Tunnel", in proceedings of 6th National Symposium on Shock Waves, IIT Madras, INDIA, February 26-28, 2020. ResearchGate Link
Snehal U.M., Vashishtha A., Jagadeesh G., “Experimental Study of Shock Instabilities over Spiked body in presence of Frontal Concave Cavity at Hypersonics", in Proceedings of 32nd International Symposium on Shock Waves, NUS, Singapore July. 14-19, 2019. DOI:10.3850/978-981-11-2730-4_0400-cd
Vashishtha A., Srisha Rao M.V., “Numerical Study of Detonation Driven Miniature Shock Tubes using OpenFoam", in Proceedings of 5th National Symposium on Shock Waves, Feb. 25 - Feb. 28, 2018 at TBRL, Chandigarh, INDIA. ResearchGate Link
Vashishtha A., Watanabe Y., Suzuki K., “Study of Bow-Shock Instability in front of Hemispherical Shell at Hypersonic Mach Number 7", presented at 45th AIAA Fluid Dynamics Conference, AIAA-2015-2638. DOI: 10.2514/6.2015-2638
Vashishtha A., Rathinam B., Delahaye L., Ravet F., Justet F., “Study of Intake Ports Design for Ultra Low Cost (ULC) Gasoline Engine using STAR-CD", SAE Tech. Paper 2012-01-0407. DOI: 10.4271/2012-01-0407
Yedlapalli S., Vashishtha A., and Rathakrishnan E., “Base Pressure Control by using Ribs in Subsonic and Sonic Suddenly Expanded Flows", published in Proceedings of 2nd International Conference on Recent Advances in Experimental Fluid Mechanics (RAEFM), March 2008, KLCE, Vijaywada (A.P.). ResearchGate Link
Sharma H., Vashishtha A., Lovaraju P., Rathakrishnan E., “Characteristics of sonic and supersonic co-flowing jets", published in Proceedings of 2nd International Conference on Recent Advances in Experimental Fluid Mechanics (RAEFM), March 2008, KLCE, Vijaywada (A.P.). ResearchGate Link
Sharma H., Vashishtha A., Lovaraju P., Rathakrishnan E., “Effect of co-axial jet on the supersonic core of a Mach 2 jet", published in Proceedings of 34th National Conference on Fluid Mechanics and Fluid Power, FMFP 2007, BIT Mesra (Jharkhand). ResearchGate Link
Jain S., K. Sumeet, Sandeep MGR, Vashishtha A., Lovaraju P. and Rathakrishnan E., “Experimental Studies on High-Speed co-owing Jets", published in Proceedings of 34th National Conference on Fluid Mechanics and Fluid Power, FMFP 2007, BIT Mesra (Jharkhand). ResearchGate Link
Sharma H., Vashishtha A. and Rathakrishnan E., “Twin Vortex Flow Physics", published in Proceedings of 9th International Symposium on Fluid Control Measurement and Visualization, FLUCOME 2007, Tallahase, Florida, USA. ISBN: 978-1-61567-624-8
Other Conference Presentations
Murray D., Vashishtha A., Lenihan D., Callaghan D., and Nolan C., “Initiation of Sympathetic Detonation between two Separated PETN charges”, presented at International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS 2022) Naples, Italy 19th - 24th June 2022.
Vashishtha A., Raoelison R.N., Deng S., Callaghan D., Nolan C. and Ramesh R., “Powder deposition by Sub-millimeter Cold-spray Micro-Nozzles", presented at 10th RIPT Les Rencontres Internationales de laProjection Thermique, 1st - 3rd June 2022.
Vashishtha A. Ahmed M., Neves A.C., Casey B., Mitchell K., Connolly D., Shanley A., Monaghan R.F.D., “Numerical Investigation of Heavy-Duty Diesel Engine powered by Syngas from Waste Gasification”, presented at Low Carbon Combustion Meeting April 05-06, 2022, Cambridge, UK.
Vashishtha A., Callaghan D., Nolan C., and Khurana S., “Effects of Freestream Disturbances in front of
Spiked Blunt Nose at Hypersonic Flow", presented at Aerospace Europe Nov 23-26,2021 Warsaw, Poland.
Vashishtha A., Callaghan D., and Nolan C., “Numerical study of an Aerospike Nozzle in Retro-propulsion", presented at Aerospace Europe, Nov 23-26, 2021, Warsaw, Poland.
Amit Kumar Sharma, PhD. Candidate (2021 - 2025) Modelling & Development of Cold Spray for Additive Manufacturing (CSAM) with non-conventional Nozzles
Research Area: Gas dynamics, Materials, Coldspray Manufacturing
Collaborators: Dr Dean Callaghan (SETU Carlow), Dr Ramesh Raghavendra (SEAM, SETU Waterford), Prof. M. Kamaraj (IIT Madras, INDIA), Prof. S Bakshi (IIT Madras, INDIA)
Funding: South-East Research Development (SERD) Scholarship Funds 2021
Dylan Edirisinghe, PhD. Candidate (2022 - 2026)
Title: Mitigation Strategies for wind turbine erosion based on climate data and uncertainty quantification methods
Research Area: Rain droplet Erosion Modelling, Uncertainty Quantification
Collaborators: Dr Edmond Tobin, Dr Lilibeth Zambrano and Dr Dave Culliton (SETU Carlow)
Funding: Project SPOTBlade, SEAI RD&D Funding Programme 2021
Upcoming, PhD. Candidate (2022 - 2026)
Title: Characterizing the Supersonic Micro-Nozzle Designs for Cold-Spray Applications
Research Area: Micro-fabrication, Coldspray Manufacturing
Collaborators: Dr Andrew Murphy (SETU Carlow), Dr Ramesh Raghavendra (SEAM, SETU Waterford), Dr R. N. Raoelison (UTBM, France)
Funding: SETU President Research Funds 2022
Nishita Ravuri, Research Masters (2022-24)
Title: Design & Applications of Air-breathing Propulsion System for Very Low and Super Low Earth Orbit Satellites
Research Area: Space Propulsion, Satellite Design, Rarefied Gas Dynamics
Collaborators: Dr Stephen Scully (SETU Carlow)
Funding: IRC GOI – Postgraduate Scholarship 2021
Rushikesh Kore, Research Masters (2022-24)
Title: Green Propellant for future small satellite launch vehicle
Research Area: Rocket Propulsion, Green Propellants, Chemistry Modelling
Funding: IRC GOI – Postgraduate Scholarship 2021
Dinesh Kumar Bajaj: Co-Supervisor (2022-26)
Title: Design and Investigation of solid-fueled Dual Combustor Scramjet Operations.
Research Area: Solid-fuel, supersonic combustion, Hypersonic Transport
Collaborators: Dr Devabrata Sahoo (MIT SOE, Pune, INDIA, Main Supervisor)
Two 4th year UG students: Supervisor (2021-22)
Research Areas: Hydrogen Blending, Micro-nozzle Cold Spray
- One M. Eng. Student from Defence Forces: Academic Co-Supervisor (2021) Master of Engineering in Communications and Information Services Research Area: Communication Systems in CIS Corps
- Three M. Eng. Students from Defence Forces: Academic Co-Supervisor (2021) Master of Engineering in Ordnance, Munitions and Explosives Engineering Research Area: Modelling, Simulations and Experiments for Explosive Disposal
Four 4th year UG students: Supervisor (2021-22)
Research Areas: Micro-nozzle Cold Spray, Simulation of Cold-spray Nozzle, Simulation of Oblique Detonation Wave, Mini Shock-tube development
Three 4th year UG students: Supervisor (2020-2021)
Research Areas: Hypersonic Aerodynamics, Cold Spray Manufacturing, Robotic Simulations.
Three 4th year UG students: Supervisor (2019-2020)
Research Areas: Simulations of Droplet dispersion, Design of VA Wind Turbine, Medical Devices
Areas of Interest for future supervisory role
- Energy Systems, Fluid-Thermodynamics
- High-speed Flows, Shockwaves (Experiments and Numerical)
- Combustion / Detonation (Experimental and Numerical)
- Fuel-Flexibility, Fuel Blending, Alternative Fuels: Hydrogen, Ammonia, Biofuels
- Cold Spray Applications: Material, Coating, Bio-medical Applications
Engagement and Collaboration
Senior Member, American Institute of Aeronautics and Astronautics (AIAA)
Member, Royal Aeronautical Society (MRAeS)
Member, Interstellar Research Group (IRG)
Member, International Shock Wave Institute
Member, The Combustion Institute, Irish Section.
Member, European Aeronautics Science Network (EASN) Association.
Member, Cold spray Club, run by School of Mined in Paris.
Member, COST Action CA20127 - Waste biorefinery technologies for accelerating sustainable energy processes
Representing SETU Carlow at SEE Space Network among SETU & MTU.
Working Group Member, Technological University (TUSEI) for Research Impact, 2020-2021
Member Health and Safety Committee at Faculty of Engineering, SETU Carlow