2 research outputs found
Estimating Water and Solid Impurities in Jet Fuel from ISO Codes
An original mathematical approach
to estimate the quantity of impurity particles in jet fuel from a
vector of ISO numbers is proposed. The main goal of this study is
to design a model that relates the proportion of free water (in parts
per million by volume, ppmv) and the content of solid contaminant
(mg/L) to the corresponding ISO numbers, traditionally used in jet
fuel industry. This model is also applied to obtain the combination
of ISO numbers corresponding to the alarm values standardized in ppmv
and mg/L units. The new method provides estimations for the free water
and solid impurities (simulated by the addition of Arizona dust in
laboratory) separately, using sequences of ISO numbers corresponding
to the sizes of 4, 6, 14, and 30 μm. It is based on the assumption
that the granulometric distribution of water (and that of the solid
contaminant) is always fixed, i.e., adding more or less percentage
of water (or solid contaminant), the number of particles of a given
size will vary proportionally. Using this assumption and starting
with an ISO code vector (or a set of them obtained by subsequent measurements),
a new procedure is proposed to split it into two vectors, corresponding
to the ISO codes of water and Arizona dust, respectively. Finally,
the contents of free water and solid contaminant are calculated from
those two ISO code vectors and validated using design of experiment
techniques. This procedure allows us to translate the standardized
alarms measured using free water (ppmv) and solid contaminants (mg/L)
into ISO numbers