Rolls-royce Corporation

Stephen Samuel Wiseall

David Cameron Wright

Sree Vamsi Tammineni

Craig Brian Chapman

Pathmeswaran Raju

Mani Seethapathy

Anthony B Phipps

James William Cheang Meas

Craig Chapman

Raju Pathmeswaran

James Meas

Determining magnitude of a field variable of an energy wave through domain of interest, including steps of: defining plurality of master-particles spaced within domain, master-particles being representative of field variables of energy wave at location of respective master-particle, and defining supporting domain &#x3a9;for each master-particle; computing field variables including position, magnitude and direction of propagation of each master-particle at predetermined time; defining plurality of virtual-particles within domain representative of magnitude of field variable of wave at location of respective virtual-particle; calculating magnitude uof field variable of each virtual-particle at time of interest by applying formula: where N is total number of master-particles, uis magnitude of respective master-particle, f(q1) is an envelope function relating magnitude of virtual-particle to distance from master-particle in direction of propagation of master-particle, and g(q2) is a smoothing function.

Method of determining the magnitude of a field variable of an energy wave

A method including the steps of: defining an original parent polygon representative domain of interest, an origin corresponding to a wavesource position within the parent, a wavesource wavefront geometry, and a maximum wavefront extent; determining one or more valid parent polygon sides; defining cutting lines from the vertices of each valid parent side to the extent; reflecting the parent about the respective valid side defining a child polygon; discarding portions of each child polygon lying beyond a cutting line from the respective parent side; redefining each child as a parent, and repeating the second to fifth steps for each parent filling the area within the extent; projecting onto the polygons within the extent, a wavefront having the wavefront geometry spaced from the origin by a specified distance; and reflecting the child polygons along the respective sides of their respective parents projecting the child polygons and wavefront onto the original parent.

Method of determining wave propagation in a medium

The ultrasonic inspectability of a supplied part out of which a final component is to be machined is determined by following a set of inspection rules for ultrasonic inspection of the supplied part. The rules determine which parts of the polygon cannot be inspected by a scan at a given ultrasound beam angle (typical beam angles are 0&#xb0;, +20&#xb0; and &#x2212;20&#xb0; relative to the perpendicular direction to the edge) along a given edge of the polygon.

Determination of ultrasonic inspectability

A laser velocimetry technique for the measurement of the three dimensional components of velocity of a particle in a fluid flow has been described. It is based on the use of a measurement region consisting of two optical probe volumes. The two optical probe volumes are physically separate and each consists of an optical fringe pattern formed by the interference of two coherent beams of the same wavelength. Two of the components of velocity are determined experimentally from the doppler signals arising from the frequency change of light scattered from a particle suspended in the fluid flow as it passes through probe volumes. The third component of velocity is derived from measuring the time of flight of a particle in the fluid flow as it passes from the center of one probe volume to another probe volume.

Laser velocimetry technique for measuring the three dimensional velocity

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Derby, United Kingdom

Stephen Samuel Wiseall