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<p>A survey of the literature on pressure , temperature and
foreign gas inlet distortions is made. For interpretation of
the influence of inlet distortion on engine stability , a break
is made with distortion methods which use temperature or pressure
distortion maps . The distortion in the form of temperature
contours is transformed to vorticity using appropriate
equations derived for both incompressible and compressible flow. Crocco's theorem has been expanded in scope to include
multispecie, nonuniform, perfect gas mixtures . The derivation
of the equations and specialization to cases of interest involved a thorough order of magnitude analysis . A numerical solution of Poisson's equation as formulated by Squire and
Winter to describe secondary flow arising from convected vorticity is presented. Deficient areas of knowledge relating to
the general temperature/foreign gas problem are outlined . A
conceptual mode l involving compressor stage transfer functions
and feedback mechanisms is introduced and discussed at several
points. Although not essential to understanding the vorticity
stall logic chain , this mode l is a useful conceptual tool and
may be worthy of additional study .
</p>
<br>Subjects: Aeronautics; compressor stall; aircraft inlet/temperature distortion; aircraft gas turbines; compressor inlet temperature distortion; steam ingestion; missile exhaust gas ingestion; rocket exhaust gas ingestion</div>
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Iverson, Michael Martin</div>
Internet Archive identifier