The oscillatory behaviour of a T-tail has been investigated at high subsonic Mach numbers on an aero-elastic model having tailplane settings of zero and three degrees. There is broadly satisfactory agreement between calculated and measured values of modal frequency and damping. The comparison has been based mainly on the flutter margin criterion of Zimmerman and Weissenburger, since the more co...

Mechanisms of cracking and delamination within thick thermal barrier systems in aero-engines subject to calcium-magnesium-alumino-silicate (CMAS) penetration S. Krämer a,∗, S. Faulhaber a, M. Chambers a, D.R. Clarke a, C.G. Levi a, J.W. Hutchinson b, A.G. Evans a a Materials Department, University of California, Santa Barbara, CA 93106-5050, United States b Division of Engineering and Applied S...

NiHMA-TONJiN.?Tlie patient, a male aged 55, by race a Tibetan, was admitted to hospital on February 9th, for the treatment of sarcoma of the upper jaw, both sides being involved. Previous History.?The patient could give no definite history as to the nature or onset of growth. except that it appeared about two years aero near the alveolar part inclining more to the right. The tumour grew very ra...

This paper approaches detection and tracking of an aero-modelling helicopter with a laser range-finder. The sensing device can complement vision for aerial vehicle control in operations such as landing or taking off from the ground. To this end, a conventional 2D laser scanner has been adapted for 3D operation by means of a motorized base. First experimental results are presented for a small-sc...

Purpose Relative to in-service aero-engines, the bypass ratio of future civil architectures may increase further. If traditional design rules are applied these new configurations and housing components scaled, then it is expected that overall weight, nacelle drag effects aircraft integration will increase. For this reason, next generation turbofan engines use compact nacelles maximise benefits ...

On-board modelling of gas turbine aero-engines over the life cycle is a promising solution for engine performance improvement and future aero-propulsion requirements. In this paper, an on-board approach named Hybrid Wiener model (HWM) proposed using post-flight monitoring data, which aims at estimating unmeasured safety-critical control parameters (i.e. thrust, surge margin, entry temperature) ...

In this paper, we compare using computational fluid dynamics the aero-thermal performance of two candidate casing manifolds for supplying an impingement-actuated active tip clearance control system aero-engine high-pressure turbine. The geometries are (a) single-entry: annular manifold fed at one circumferential location; (b) multiple-entry: a split into four sectors, with each sector supplied ...