The structural health of airframes is often monitored by analysis of the frequency of occurrence matrix (FOOM) produced after each flight. Each cell in the matrix records a stress event of a particular severity. These matrices are used to determine how much of the aircraft’s life has been used up in each flight. Unfortunately, the sensors that produce this data are subject to degradation themse...

A = area of the rough wall Aj = jth equal subarea of the rough region, A=NA B = empirical constant for the mean velocity profile on a rough wall; Eq. (29) CA = A-weighting factor CF = overall skin friction coefficient, 1 L R L 0 cf dx1 c = speed of sound in free field cf = local skin friction coefficient, w= 1 2 0U 2 cf0 = local skin friction coefficient at a distance xle from the leading edge ...

Three-dimensional throughflow models represent a turbomachinery cascade via force distribution without the need for detailed geometric modelling in numerical solution, saving consistent computational resources. In this paper, we present application of body method on an axial transonic fan implemented into in-house tool axisymmetric simulations. By systematic comparison local and integral quanti...

Feedback of information has consistently shown positive results in human inspection, provided it is given in a timely and appropriate manner. Feedback serves as the basis of most training schemes; traditionally this has been performance feedback. Other forms of feedback which provide strategy information rather than performance information may have a role in improving inspection. This study com...