A5107996491- Rocket and propulsion systems research
- Energetic Materials and Combustion
- Combustion and Detonation Processes
- Computational Fluid Dynamics and Aerodynamics
- Aerodynamics and Fluid Dynamics Research
- Fluid Dynamics and Turbulent Flows
- Cardiovascular and Diving-Related Complications
- Intracranial Aneurysms: Treatment and Complications
- Spaceflight effects on biology
- Aerospace Engineering and Control Systems
- Aerodynamics and Acoustics in Jet Flows
- Plasma and Flow Control in Aerodynamics
- Spacecraft and Cryogenic Technologies
- Astro and Planetary Science
- Gas Dynamics and Kinetic Theory
- Advanced Aircraft Design and Technologies
- Nanopore and Nanochannel Transport Studies
- Hemoglobin structure and function
- Space Satellite Systems and Control
- Cyclone Separators and Fluid Dynamics
- Icing and De-icing Technologies
- Radiative Heat Transfer Studies
- Electromagnetic Launch and Propulsion Technology
- Traumatic Brain Injury and Neurovascular Disturbances
- Turbomachinery Performance and Optimization
Amity University
2025
Argonne National Laboratory
2023-2024
Indian Institute of Science Bangalore
2018-2023
Indian Space Research Organisation
2003-2023
Amity University
2023
Queen's University
2021-2023
Vikram Sarabhai Space Centre
1996-2022
GITAM University
2020
All India Institute of Medical Sciences
2020
Indian Institute of Technology Kanpur
2017
Abstract The possibilities of the application Data Science Methods in predicting certain macroscopic properties have been examined energetic compounds. Artificial neural networks, one most promising methods Science, has used for detonation velocity based on a trained set comprising large data containing 104 points extracted from over 65 explosive compounds and compositions with diverse characteristics properties. utility method demonstrated through validation 37 again constituting to 74...
The aviation industry’s global nature necessitates a sophisticated aircraft technical surveillance/ audit application for international regulatory bodies. Auditors face significant challenges in overseeing commercial due to its complex components, including design, manufacturing, maintenance, and operations. varied fleet sizes types operated by different airline operators further complicate the process[1]. While regulators receive comprehensive training, deploying specialized each location...
A closed-form analytical model is developed for estimating the 3D boundary-layer-displacement thickness of an internal flow system at Sanal choking condition adiabatic flows obeying physics compressible viscous fluids. At this unique boundary-layer blockage induced fluid-throat and wall-friction persuaded occur a single sonic-fluid-throat location. The beauty novelty that without missing we could predict exact both 2D cases from known values inlet Mach number, index gas port diameter system....
The first law of thermodynamics reveals that all fluids are compressible, and the second entails to have positive viscosity. These established laws reaffirm possibilities occurrence Sanal flow choking in yocto yotta scale systems beyond [Kumar et al., “Discovery nanoscale cardiovascular system: Exact prediction 3D boundary-layer-blockage factor nanotubes,” Sci. Rep. 11, 15429 (2021); “Sanal choking: A paradigm shift computational fluid dynamics code verification diagnosing detonation...
Theoretical studies have been carried out to examine internal flow choking in the inert simulators of a dual-thrust motor. Using two-dimensional k-omega turbulence model, detailed parametric aerodynamic and existence fluid throat at transition region during startup transient motors. This code solves standard equations with shear corrections using coupled second-order-implicit unsteady formulation. In numerical study, fully implicit finite volume scheme compressible, Reynolds-averaged,...
The theoretical discoveries of the Sanal flow choking [V. R. Kumar et al., “Sanal choking: A paradigm shift in computational fluid dynamics code verification and diagnosing detonation hemorrhage real-world fluid-flow systems,” Global Challenges 4, 2000012 (2020)] streamtube “Deflagration to transition chemical rockets with sudden expansion/divergence regions,” AIAA Paper No. 2020-3520, 2020] achieved significant contemplation all branches science engineering for resolving various unanswered...
Diagnostic investigations of aneurysm, hemorrhagic stroke, and other asymptomatic cardiovascular diseases neurological disorders due to the flow choking (biofluid/boundary layer blockage persuaded choking) phenomenon in circulatory system humans animals on Earth human spaceflight are active research topics topical interest {Kumar et al., “boundary leads stroke earth spaceflight,” Paper presented at Basic Cardiovascular Sciences Conference, 23–25 August 2021 (American Stroke Association,...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
The basic idea behind a solid rocket motor (SRM) is simple but its design complex technological problem requiring expertise in diverse subdisciplines to address all of the physics involved. optimization high-performance rockets more when mission demands dual thrust. motivation for present study emanates from desire explain phenomena or mechanism(s) responsible high ignition peak pressure (pressure peak), pressure-rise rate, instabilities, and oscillations often observed during static tests...
Abstract Evidences are escalating on the diverse neurological-disorders and asymptomatic cardiovascular-diseases associated with COVID-19 pandemic due to Sanal-flow-choking. Herein, we established proof of concept nanoscale Sanal-flow-choking in real-world fluid-flow systems using a closed-form-analytical-model. This mathematical-model is capable predicting exactly 3D-boundary-layer-blockage factor diabatic-fluid-flow (flow involves transfer heat) at condition. As pressure diabatic nanofluid...
Detailed theoretical and experimental studies on flame spread over nonuniform ports of solid propellant rockets have been carried out. An idealized two-dimensional laboratory motor was used for the study with aid cinematography. A detailed numerical simulation has also out help a Navier-Stokes solver. Experimental results showing phenomenon secondary ignition reported earlier reviewed here inclusion additional three-dimensional geometry closer to dual-thrust motor. In this paper more...
The accurate thermoviscoelastic characterization of a solid propellant is critical for optimum design grains high-performance motors space applications. A more realistic experimental method reported the propellants at multiaxial stress conditions using grain-pressurization test called tubular test. An idealized cylindrical grain with hydroxyl-terminated-polybutadiene-based used. From measured outer radial expansion specimen, creep compliance and relaxation modulus are computed based on...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
A detailed experimental study on flame spread over non-uniform ports of solid propellant rockets has been carried out. An idealised. 2-dimensional laboratory motor was used for the with aid cinephotography. Freshly prepared rectangular HTPB backward facing step as specimenfor this study. It shown conclusively that under certain conditions location. height and port which govern velocity gases at by partially ignited surface. secondary ignition may occur far downstream step. This is very...
Abstract The space debris management and alleviation in the microgravity environment is a dynamic research theme of contemporary interest. Herein, we provide theoretical proof concept lucrative energy conversion system that capable changing into useful powders International Space Station (ISS) for various bids. A specially designed broom adapted to collect sizes. An optical sorting method proposed segregation ISS by creating an artificial gravitational field. It could be done using...
In this study we consider the flow over airfoils with leading-edge roughness, designed to mimic ice depositions that may occur on an aircraft in flight. The focus of investigation is effect angle attack mean-flow three-dimensionality. our previous work (Kumar et al., Journal Turbulence, Vol. 22, No. 11, 2021, pp. 735–760), found stationary spanwise inhomogeneities form alternating regions fast- and slow-moving fluid, which were termed “flow channels.” present investigate further phenomenon....
One of the major limitations existing unmanned aerial vehicles is limited flight endurance. In this study, we designed an innovative uninterrupted electromagnetic propulsion device for high-endurance missions a quadcopter drone lucrative exploration earth and other planets with atmospheres. As airborne platform, could achieve scientific objectives better than state-of-the-art revolving spacecraft walking robots, without any terrain limitation. We developed mixed reality simulation based on...