Dr Ashish Vashishtha

PhD MTech BTech

Assistant Lecturer

806 Killeshin Building

e: ashish.vashishtha@itcarlow.ie      t: 059 9175000

ORCID ID: 0000-0002-8385-3740     ResearchGate

Dr Ashish Vashishtha joined Dept. of Aerospace Mechanical and Electronic Engineering at IT Carlow as Assistant Lecturer in 2019. He earlier worked as postdoc at NUI Galway for emission estimation in gas-turbine combustor as well as at Indian Institute of Sciences, India in the area of experimental and numerical hypersonic flows and combustion detonation. He received his PhD from The University of Tokyo JAPAN in experimental and numerical unsteady hypersonic flows. He also had 4.75 years of industrial experience regarding numerical 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 research in supersonic flows and high-speed jets.

  • Research Interests
  • Publications
  • Research Supervision
  • Engagement and Collaboration

Research Interests

Dr Vashishtha has wide range of experience in industry and academia related to experimental and numerical fluid-thermodynamics applications, reactive flows etc. Currently, he is actively pursuing applied aspects of fluid and thermodynamics related to automotive, space and energy industries. His research interest can be summarized as follows:

  • High-Speed Flows: Experimental & Numerical
  • Flow Controls, Shock Waves, Unsteady Flow Analysis.
  • Reactive Flows, Combustion, Detonation, Emission Modelling, Hydrogen Energy
  • Instrumentation, 2-D and 3-D Unsteady Optical Flow Measurement Techniques, Data Driven Analysis Methods.
  • Additive Manufacturing, Cold Spray Systems

Publications

Peer Reviewed Journal Articles


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

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 (2021). DOI:10.1088/1757-899X/1024/1/012110

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., 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. 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

Dissertations:

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

Research Supervision

Ongoing
  • Peter Harmon: Drag Control using counter flow injection with light gases, 4th year UG Project.
  • Jack Duffin: Supersonic Jet impingement studies for application of cold spray, 4th year UG Project.
  • Xiazhen Xu: Design and dynamic simulations of multifunction transformative robot, 4th Year UG Project.
Completed
  • Cathal Fagan: Design Study of Vertical Axis Wind Turbine (VAWT) Level 8 Final Project
  • Erik Perse: Design Analysis of Air-dampener for Bio-medical application Level 8 Final Project
Areas of Interest for future supervisory role
  • Energy Systems, Fluid-Thermodynamics
  • High-speed Flows, Shockwaves (Experiments and Numerical)
  • Combustion / Detonation / Emissions from fuel blends (Experimental and Numerical)
  • Hydrogen based Energy Systems and Industrial Safety
  • Modelling related to Additive Manufacturing, Bio-medical instruments, micro and nano-fluid mechanics.

Engagement and Collaboration

  • Member, American Institute of Aeronautics and Astronautics (AIAA)
  • Member, The Combustion Institute, Irish Section.
  • Member, European Aeronautics Science Network (EASN) Association.
  • Member, Cold spray Club, run by School of Mines in Paris.

Invited Lecture:
Webinar on “Hypersonic Flows”, organized by Dept. of Aerospace Engineering, Laki Reddy Bali Reddy College of Engineering, Mylavaram, Krishna Distt, AP, INDIA, June 07, 2020.