About
10
Publications
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Citations
Introduction
Pawel Kekus, with a PhD from the University of Southampton, is a researcher in the Acoustics Division at Łukasiewicz Research Network - Institute of Aviation in Warsaw, Poland. His main areas of expertise are experimental aerodynamics, optimisation and aeroacoustics.
Current institution
Additional affiliations
July 2020 - present
Łukasiewicz Research Network - Institute of Aviation
Position
- Senior Researcher
Publications
Publications (10)
This article presents the results of an experimental investigation into the impact of rake, or inclination of the underfloor, on the aerodynamics of a bluff body equipped with an underbody diffuser. An extensive wind tunnel campaign, utilising a remotely-actuated model for faster data acquisition, showed that introducing rake results in a downforce...
A series of benchmark and off-the-shelf unmanned air vehicle rotors with diameters around 12 inches was tested in the newly-built anechoic chamber at the Łukasiewicz Research Network - Institute of Aviation, as well as in an open field. The aerodynamic performance of the rotors was assessed using thrust and torque meters embedded in a custom testin...
This research project was focused on two related topics—hardware-in-the-loop aero- dynamic optimisation, and aerodynamics of automotive underbody diffusers in the presence of rake, defined as an inclination of the underfloor with respect to the ground. Two experimental systems were used for automatic, closed-loop optimisation trials, and for mappin...
A wind tunnel-based morphing system was devised and utilised for aerodynamic data collection and real-time optimisation of an Ahmed body equipped with a diffuser. Three degrees of freedom were controlled, i.e. ride height, rake angle of the underfloor, and angle of the diffuser plane. Their impact on performance was investigated with a fixed ground...
Purpose
The purpose of this study is to determine the impact of two parallel boosters fixed to the ILR 33 AMBER 2 K core rocket stage on its aerodynamic characteristics in the subsonic and transonic regimes and for M = 2.3.
Design/methodology/approach
Wind tunnel tests of the rocket model were carried out in a trisonic wind tunnel using a six-comp...
The acoustic characteristics of a liquid-propellant rocket engine, utilising high-test peroxide and ethanol as the bipropellant, were studied using numerical simulations with constant-frequency ex-citations. The simulated geometry included a porous catalyst, a retainer, a combustion chamber and a converging-diverging nozzle. Realistic profiles of f...
The acoustic characteristics of a liquid-propellant rocket engine were studied using numerical simulations with constant-frequency excitations. The simulated geometry included a porous catalyst, a retainer, a combustion chamber and a converging-diverging nozzle. Realistic profiles of flow parameters were imposed onto the internal flow volume, which...
Database of aerodynamic measurements of an automotive underbody diffuser model, supporting the discussion in Chapter 6 and Appendix A of the accompanying thesis entitled "Aerodynamics and Experimental Optimisation of Automotive Underbody Diffusers in the Presence of Rake."
Laminar boundary layer vortex shedding is one of the main sources of airfoil self-noise. It occurs at moderate Reynolds numbers and angles of attack, where a relatively large region of laminar boundary layer is developed over an airfoil. The airfoil tonal noise, which is a result of laminar boundary layer instabilities, is critical in designing low...
