Rolls-Royce Holdings

About: Rolls-Royce Holdings is a company organization based out in Derby, United Kingdom. It is known for research contribution in the topics: Turbine & Gas compressor. The organization has 4027 authors who have published 6305 publications receiving 80517 citations. The organization is also known as: Rolls-Royce Holdings plc.

Measurement of Heat Transfer Coefficient Distributions and Flow Field in a Model of a Turbine Blade Cooling Passage With Tangential Injection

Abstract: In certain regions of turbine aerofoils, cooling system designers need to cool the blades with convection systems that provide high heat transfer coefficients. The present research has investigated a circular cooling passage with tangential injection suitable for a blade leading edge. The heat transfer coefficients are measured using the conventional transient heat transfer, liquid crystal technique. The results are compared to the data from steady state experiments performed by Hedlund et al. [1]. The cooling system performance is compared in detail to average data from earlier tangential injection experiments and to local heat transfer coefficient expected from a normal impingement system. The vortex flow field was also studied by numerical prediction and near-wall velocity measurements. The investigation of the flow structure has led to understanding of flow mechanisms responsible for the high heat transfer coefficient. The vortex flow field was also investigated using computational fluid dynamics and with hot wire anemometry. The latter near wall measurements were combined with the law of the wall and Colburn analogy to validate the flow and heat transfer measurements.© 2006 ASME

The Role of Drainage Channels in the Performance of Wave-Plate Mist Eliminators

Abstract: Numerical simulation of the performance of an idealized wave-plate mist eliminator is used to assess the influence of drainage channels in the mist eliminator passages. The effect of the drainage channels on the primary gas flow and on the evolution of the liquid droplet distribution is calculated for a range of gas speeds, wave-plate spacing, channel sizes and inlet droplet size distributions. The ability of drainage channels to increase the droplet collection efficiency is confirmed and several features of the flow are predicted which have implications for the design of wave-plate mist eliminators.

Method of generating an inspection program and method of generating a visual display

Abstract: A computer-implemented method of generating an inspection program for a computer-controlled coordinate measuring probe comprises the steps of: (a) receiving nominal geometry data for a component, (b) receiving inspection requirement data specifying one or more selected shape characteristics of the component, (c) determining from the nominal geometry data and the inspection requirement data an inspection path for a computer-controlled coordinate measuring probe, the inspection path enabling the measuring probe to measure actual component coordinates associated with the selected shape characteristics, and (d) generating an inspection program for moving the computer-controlled coordinate measuring probe along the inspection path.