The role of recombination during a common-envelope event has been long debated. Many studies have argued that much hydrogen energy, which is radiated in relatively cool and optically-thin layers, might not thermalise the envelope. On other hand, helium contains 30% total occurs deeper stellar We investigate distinct roles played by interaction experienced 12 solar mass red supergiant donor. per...

Modern aeroengine designs strive for peak specific fuel and thermal efficiency. To achieve these goals, engines have more highly loaded compressor stages, thinner aerofoils, blended titanium integrated disks (blisks) to reduce weight. These configurations promote the occurrence of aeroelastic phenomena such as flutter. Two important parameters known influence flutter stability are reduced frequ...

The paper presents a generalized composite noncertainty-equivalence adaptive control system for the of prototypical aeroelastic wing section using single trailing-edge surface. plunge–pitch (two-degree-of-freedom) dynamics this include torsional pitch-axis nonlinearity. open-loop exhibits limit cycle oscillations beyond critical free-stream velocity. It is assumed that parameters model are not ...

Plunge milling is a machining process recognized to be efficient for roughing deep workpieces. This due the distribution of cutting forces on tool. Important axial and reduced radial lead more rigidity, eventually productivity. It commonly used in case hard cut materials, like titanium alloys. However, plunge can exhibit problem at end plunging phase, which increase forces. Within this paper, s...