RT Journal Article
ID 7393dc532c8879dc
A1 Voevodin, Aleksandr Vladimirovich
T1 ASSYMETRY AND NONUNIQUENESS OF THE SOLUTION OF THE PROBLEM OF SEPARATED FLOW OVER A SLENDER CONICAL WING-BODY COMBINATION
JF TsAGI Science Journal
JO TSAGI
YR 2009
FD 2010-07-23
VO 40
IS 6
SP 669
OP 682
K1 asymmetry
K1 non-uniqueness
K1 separated flow
K1 cone-delta wing
K1 low aspect ratio
K1 calculations with account of viscosity
AB Performed are the numerical investigations of the separated flow over a slender circular cone-delta wing combination within a wide range of key parameters, with the combination being situated symmetrically relative to the free stream. Two approaches are used to solve the problem. Within the framework of the slender body theory, nonunique symmetrical and asymmetrical solutions are obtained. The area of existence of various solutions is specified. The 3D-RANS CFD calculations of the small aspect ratio combination with the forebody in the form of a circular cone and with the delta wing, taking into account the viscosity, are carried out. It is shown that in this case, the problem has unique solutions, which are symmetrical at small angles of attack and asymmetrical at greater ones. At relative angles of attack, being less than 2, the lift coefficients, obtained by two approaches, are very close. This fact estimates the application area of the slender body theory. The flow patterns in the section of the combination conical part, illustrating the flow peculiarities, are given.
PB Begell House
LK https://www.dl.begellhouse.com/journals/58618e1439159b1f,4988c9316c5df344,7393dc532c8879dc.html