A5102981735- Computational Fluid Dynamics and Aerodynamics
- Plasma and Flow Control in Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Plasma Diagnostics and Applications
- Laser-induced spectroscopy and plasma
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Vibration Analysis
- Vacuum and Plasma Arcs
- Gas Dynamics and Kinetic Theory
- Advanced X-ray Imaging Techniques
- Wireless Body Area Networks
- Laser-Plasma Interactions and Diagnostics
- Mass Spectrometry Techniques and Applications
- Aerodynamics and Fluid Dynamics Research
- Laser Design and Applications
- Advanced Electron Microscopy Techniques and Applications
- Laser Material Processing Techniques
- Electron and X-Ray Spectroscopy Techniques
- Ultra-Wideband Communications Technology
- Optical Systems and Laser Technology
- Photoacoustic and Ultrasonic Imaging
- Semiconductor Lasers and Optical Devices
- Turbomachinery Performance and Optimization
- Antenna Design and Analysis
- Atomic and Molecular Physics
Northwestern Polytechnical University
2021-2024
National University of Sciences and Technology
2019-2022
Czech Academy of Sciences, Institute of Physics
2019
Czech Technical University in Prague
2013-2015
The choice of the correct density profile is crucial in laser wakefield acceleration. In this work, both subsonic and supersonic gas targets are characterized by means fluid-dynamic simulations experimental interferometric measurements. studied different configurations, profiles most suitable for acceleration discussed.
Typical challenges of supersonic flight include wave drag, acoustic signature, and aerodynamic heating due to the formation shock waves ahead vehicle. Efforts in form sleek designs, better propulsion systems, implementation passive active techniques are generally adopted achieve a weaker system. Shock reduction can improve range, reduce fuel consumption, provide thermal protection forebody region. This paper briefly reviews techniques, including passive, active, hybrid flow control. Airfoil...
A closed-loop parameter optimization system around a cylinder is built by integrating the plasma actuation and genetic algorithms in this research, employing numerical simulations experimental methods. The study aims to minimize total drag on optimizing reduced frequency. pair of surface dielectric barrier discharge actuators, powered alternating-current high-voltage sources, symmetrically positioned at ±90° azimuth angles two sides circular cylinder, Reynolds (Re) number 1.5×104 based...
In this research paper, investigations of counter flow (opposing) jet on the aerodynamic performance, and flight stability characteristics an airfoil with blunt leading-edge in supersonic regime are performed. Unsteady Reynolds-Averaged Navier-Stokes ( U R A N S ) based solver is used to model field. The effect angle attack α ), free-stream Mach number M ∞ pressure ratio P performance without compared. results indicate that opposing reduces drag from 30 % 70 , improves maximum lift-to-drag...
Time-integrated spectra and time-resolved (20 ns resolution) of nitrogen discharge plasma radiation were recorded analyzed. Plasma was created by a 70 kA, 29 rise-time current pulse flowing through 5 mm inner diameter, 224 long capillary filled with to initial pressure ∼0.1 ÷ 1 kPa. Spectra captured in the wavelength range 8.3 14 nm. This spectral region contains Balmer series lines including potentially lasing NVII 2 – 3 transition<sup>1</sup>. Spectral identified using NIST database...
The study presents a numerical investigation of aerodynamic drag reduction by implementing counterflow plasma jet, emanating from the stagnation point an surface in supersonic regime with constant pressure ratio <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mfenced open="(" close=")" separators="|"> <mrow> <mtext>PR </mtext> <mo>=</mo> <mn>3</mn> </mrow> </mfenced> </math> , and compares findings conventional opposing jet. computational is carried out solving three-dimensional...
The wavelength diffraction limit, described by the Rayleigh criterion, can be overcome if short radiations are employed, thus it is possible to resolve smaller features use of radiation in extreme ultraviolet (EUV) and soft X-ray (SXR) spectral ranges. In particular way, from "water window" range, which extends between K-absorption edges carbon oxygen (280÷540 eV), could used order obtain high-contrast biological imaging. Laser-plasma double stream gas puff target source suitable for SXR...
During adiabatic expansion of Z-pinching plasma column can arise conditions suitable for amplified spontaneous emission (ASE) pumped by 3-body recombination. MHD and kinetic simulations had shown <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> , that capillary discharge with current amplitude I > 60 kA slope dI/dt 2 × 10 xmlns:xlink="http://www.w3.org/1999/xlink">12</sup> As xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> produce...
View Video Presentation: https://doi.org/10.2514/6.2023-4086.vid In the actual assembly process of civil aircraft nacelle inlet, small size installation steps between inlet lip skin and inner wall panel will have a certain impact on aerodynamic performance inlet. Reynolds-Averaged Navier-Stokes modelling is used to simulate influence fan plane under climbing cruising states, respectively. The results demonstrate that when step height exceeds 1.5 mm angle attack, total pressure recovery...