A Mach-scaled model rotor with active twist capability is in preparation for a wind tunnel test in the large lowspeed facility (LLF) of the German-Dutch wind tunnel (DNW) with international participation by DLR, US Army, NASA, ONERA, KARI, Konkuk University, JAXA, Glasgow University and DNW. To get the maximum benefit from the test and the most val...
Plasma-assisted combustion (PAC) is an exciting way of improving the stabilisation of supersonic combustion and fuel-oxidant mixing in a scramjet, especially during transient modes. However, coupling hydrodynamic and electric physic makes the numerical approach difficult. The article aims to model the operation of a Plasma Injector Module (PIM) dev...
The noise radiated from a Darrieus vertical axis wind turbine (VAWT) is propagated in different idealized urban scenes using a 2.5D ray-based engineering method. Noise measurements and simulated Lattice Boltzmann Method (LBM) results from a Darrieus VAWT are employed as a noise source to perform ray tracing around various idealized benchmark urban ...
Published in Frontiers in Aerospace Engineering
Propulsion systems based on the constant-pressure combustion process have reached maturity in terms of performance, which is close to its theoretical limit. Technological breakthroughs are needed to develop more efficient transportation systems that meet today’s demands for reduced environmental impact and increased performance. The Rotating Detona...
Published in Frontiers in Aerospace Engineering
The efficiency of a Rotating Detonation Combustor (RDC) strongly depends on the transitory injection process of fresh reactants in the combustion chamber: poor propellant mixing induces losses of combustion efficiency and consequently low detonation speed and unstable detonation propagation. Moreover, dilution of fresh reactants with burnt gases du...
This study focuses on a water injection system, typical of those used to inject water in the motor jet plume of rocket engines to reduce noise, and particularly on the destabilization of the liquid jet that leads to a spray system. For that purpose, a large-eddy simulation is conducted for an experimental water jet of the literature. It is a sprink...
Although drones have benne widely studied in the field on flight control, their aerodynamic behavior is yet to be completely understood. Recently, some studies using RANS and LES models have been realized and they tend to rely on scanned geometries of commercial propellers. In this paper a better understanding of how a drone propeller behaves in ho...
Lors d’un amerrissage d’avion, la structure est fortement sollicitée et les chargements subis peuvent mener à sa rupture, partielle ou totale. Les structures sont donc dimensionnées afin de minimiser ces risques et celui de blessures des occupants. Les progrès récents des capacités de calcul ont conduit à une utilisation accrue des simulations numé...
The efficiency of a Rotating Detonation Engine (RDE) strongly depends on the transitory injection process of fresh reactants in the combustion chamber: poor propellant mixing induces losses of combustion efficiency and consequently low detonation speed and unstable detonation propagation. Moreover, dilution of fresh reactants with burnt gases durin...
The injector of a Rotating Detonation Engine (RDE) is a key element providing stability and efficiency of its operation. On the one hand, it is widely accepted that experimental investigations of the injection and mixing processes in a RDE are difficult to perform. This is due to the short time period between consecutive detonation passages, the co...
