Aug 2021 – Current Syracuse University, USA
Doctorate in Engineering, Mechanical & Aerospace Engineering
Multiscale Research & Engineering Laboratory (MREL), Syracuse, NY - 13244
Aug 2018 – Dec 2020 Indian Institute of Technology Kanpur, India
Master of Science (By Research), Aerospace Engineering
Hypersonic Experimental Aerodynamics Laboratory (HEAL) Kanpur, Uttar Pradesh, India - 208016
Aug 2014 – Apr 2018 Visvesvaraya Technological University, India
Bachelor of Engineering, Mechanical Engineering
Jun 2011 – Apr 2013 Tilottama Campus, Nepal
12th – Maths, Physics, Chemistry, Biology, Butwal, Nepal
Jun 2010 – Apr 2011 Manakamana English High School, Nepal
10th – Maths, Science, Social Science, Accounting, Bhairahawa, Nepal
Advisor: Prof. Shalabh C. Maroo
Advisor: Prof. Mohammed Ibrahim Sugarno
Planar plug nozzles being a potential and integral part of the propulsion systems, the current investigation is focused on assessing the effect of incorporating sidewall on the flow field and pressure distribution. In view of this, experiments have been carried out at different Nozzle Pressure ratios (NPR) corresponds to the overexpanded nozzle operating conditions. Initial experiments have been conducted to obtain the steady pressure distribution along the centerline and sideline in the presence of the sidewall and without sidewall. In order to have a better understanding of the flow features, Schlieren and oil flow visualization is performed. Oil flow visualization, in conjunction with steady pressure distribution, has been analyzed successfully to identify the dominant flow feature and their locations. This exploration provides evidence of the presence of a recirculation bubble whose size varies depending on the NPR as well as the presence of the wall. Furthermore, Schlieren flow visualization reveals the flow as unsteady, thereby demanding detailed unsteady analysis for the flow field. Therefore, unsteady pressure measurements both along the centerline and sideline have also been done and further processed to obtain its frequency spectrum. Spectral analysis of the unsteady pressure signals revealed a clear difference between the attached and the separated flow. In addition, other flow features with a distinct temporal mode associated with and without lateral confinement are observed. The intensity of low-frequency unsteadiness is comparatively reduced in the absence of lateral confinement; however, on the contrary, the interaction region is fairly reduced under lateral confinement.
Advisor: Prof. Padmini B.V.
Erosion is a severe and most common problem in boiler tubes of power plant boiler, aircraft engine, and steam and jet turbines. Erosion wear causes the loss of material from the component gradually, reduces the performance and thus, finally leads to failure of component. Coating of the boiler steel (substrate) is one of the effective methods to reduce the erosion wear. The paper aims to use high pressure cold spray technology to coat the boiler steel. Cold spray is a promising technology for depositing protective coatings. In this current research work of boiler steel, two coating powders PG-AMP-1060 (NiCrMoNbFeTa) & PG-AMP-1080(NiCrCoTiAlW) was coated over T11 boiler steel substrate by cold spray coating technology. The T11 boiler steel, both coated and uncoated was subjected to jet erosion test at high temperature at an impact angle of 30° & 90° along with SEM, EDS and XRD characterization. Erosion rate is observed more for impact angle of 30° than 90°. It is observed that the coated specimen showed better wear resistance than uncoated ones.