Математическое моделирование отрывного дозвукового обтекания…
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Mathematical modeling of separated subsonic flow
around axially symmetrical bodies with base pressure
© V.N. Timofeev
Bauman Moscow State Technical University, Moscow, 105005, Russia
The article describes mathematical modeling of the process of the flow separation on ax-
ially symmetrical bodies conducted on the base of the concept of viscous–inviscid inter-
action. Moderate subsonic speeds of the flow of gas were examined. The numerical mod-
eling of the flow process around bodies was carried out by the method of discrete
vortices. Hoerner's formula was used for a more complete account of the base pressure
influence. We studied flow conditions with flow separation line close to the contour of the
rear section. Cylindrical bodies with the head part of the ogival form and without the
rear part were examined. The dependences of the length of the tailed section of equiva-
lent body on Reynolds number and length of the body, streamlined with the gas flow,
were proposed according to the results of mathematical modeling. The dependences rep-
resented in the work make it possible to build the locked and relatively simple procedure
of calculation of the separated subsonic flow around bodies taking into account the influ-
ence of base pressure.
Keywords:
subsonic separated flow, mathematical modeling, method of discrete vortices,
base pressure
.
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