Abstract: A model consisting of n five-degree-of-freedom subsystems has been developed to characterize some of the mechanical response features of a bladed disk system, including four modes of each blade, ...

Abstract: An experimental study of the fluctuating velocity field and the fluctuating static wall pressure in an annular turbulent air flow system with a radius ratio of 4.314 has been conducted. The ...

Abstract: This paper examines the application of matrix transformations from the experimentally obtained receptance matrix to the dynamic stiffness matrix to determine changes of blade stiffness and/or mass ...

Abstract: Combustion tests of crude Paraho shale oil (0.7 percent sulfur and 2 percent nitrogen) were conducted in a 45 MW boiler equipped with six frontface mounted burners each rated at 85 million ...

Abstract: Holography has been developed by Rolls-Royce as a technique for routine use in the evaluation of fan designs for aeroengines. It is used to investigate both aerodynamic and mechanical behavior ...

Abstract: A resonant beam tuned damping device, comprising a flexible beam joined by way of visco-elastic links at the ends, to a vibrating structure, is described. This device has the advantage of ...

Abstract: Ten aviation turbine fuels (five Jet-A fuels, three JP-5, one JP-8, and one JPTS) were stressed at 185 and 225°C in a single-pass heat exchanger. On the basis of several criteria applied ...

Abstract: The effects of cavity diameter, jet-exit distance, and flow rate on the performance of a jet-driven cylindrical cavity oscillator are investigated experimentally in this study. The cavity oscillator ...

Abstract: This paper reports the results of a preliminary investigation of the feasibility of reducing vibratory response levels in jet engine turbine blades by means of tuned damping devices incorporating ...