TITLE:
Aerodynamic Optimization of the Expansion Section in a Hypersonic Quiet Nozzle Based on Favorable Pressure Effect
AUTHORS:
Jian Gong, Dapeng Yao, Xunhua Liu
KEYWORDS:
Quiet Nozzle, Maximum Expansion Angle, Favorable Pressure Effect
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.6,
May
19,
2014
ABSTRACT: Maximum expansion angle is the primary parameter
for the design of expansion section of hypersonic quiet nozzle. According to
the quantity of maximum expansion angle, expansion section could be classified
as fast expansion and slow expansion. In order to diminish the effect of instability
of Görtler vortex, gradually, slow expansion was employed for quiet nozzle design.
Based on the favorable pressure effect, the maximum expansion angle is
optimized in this paper, and a considerable selective session of maximum
expansion angle is obtained. The trend that slow expansion is employed instead
of fast expansion is explained, and a new method is established for aerodynamic
optimization of expansion section contour in a quiet nozzle.