Romanian Research and Development Institute for Gas Turbines

Accelerated Degradation of Polypropylene Mitigated by Cooperative Effect of n-SiO2 and Rosemary Extract

This study analyzes the stabilization effects of silica nanoparticles and rosemary extract on polypropylene during accelerated degradation caused by exposure to γ-rays. The accurate procedures involved in the mitigation of oxidative degradation (isothermal and nonisothermal chemi...

Mechanical and Thermomechanical Performance Evaluation of CFRP Sandwich Structures with Additively Manufactured Composite Cores

This study experimentally evaluates how various 3D-printed gyroid core materials influence the mechanical and thermo-mechanical performance of lightweight carbon-fiber-reinforced polymer (CFRP) sandwich structures. Three gyroid core configurations were considered: short-carbon-fi...

Computational Nozzle Design for Pulsed Detonation Thrusters for Vacuum Operations

This study presents the numerical design and optimization of a convergent–divergent nozzle integrated with a pulsed detonation combustor (PDC) operating under reduced outlet pressure conditions. The work builds upon an experimentally validated TRL 4 PDC with demonstrated vacuum o...

Influence of Bimodal Pore Architecture on Broadband Acoustic Absorption and Mass Reduction in AlSi Open-Cell Structures

Lightweight materials capable of simultaneously providing noise and mass reduction are increasingly required in aerospace applications. This paper investigates the acoustic performance of a novel hierarchical bimodal architecture in open-cell AlSi porous structures, integrating μ...

Static Ground Validation of an AI-Assisted Acoustic Target Detection and Azimuth Estimation Framework on a Flying-Wing VTOL UAV

Autonomous acoustic sensing systems are increasingly investigated for unmanned aerial vehicle (UAV)-based surveillance and environmental monitoring applications due to their passive operation and relatively low computational requirements. However, the integration of acoustic clas...